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Apply backports from rust-lang/llvm#47, #48, #53, #54

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This commit is contained in:
Josh Stone 2016-10-17 21:19:09 -07:00
parent 307be8a531
commit 44886631c9
6 changed files with 1359 additions and 4 deletions
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19
llvm.spec
View file

@ -7,7 +7,7 @@
Name: llvm
Version: 3.9.0
Release: 2%{?dist}
Release: 3%{?dist}
Summary: The Low Level Virtual Machine
License: NCSA
@ -23,7 +23,13 @@ Patch1: 0001-This-code-block-breaks-the-docs-build-http-lab.llvm..patch
Patch2: 0001-fix-docs-2.patch
Patch3: 0001-fix-docs-3.patch
Patch4: 0001-docs-fix-cmake-code-block-warning.patch
Patch5: 0001-Backport-rL281650.patch
# backports cribbed from https://github.com/rust-lang/llvm/
Patch47: rust-lang-llvm-pr47.patch
Patch48: rust-lang-llvm-pr48.patch
Patch51: rust-lang-llvm-pr51.patch
Patch53: rust-lang-llvm-pr53.patch
Patch54: rust-lang-llvm-pr54.patch
BuildRequires: cmake
BuildRequires: zlib-devel
@ -80,7 +86,11 @@ Static libraries for the LLVM compiler infrastructure.
%patch2 -p1 -b .docs2
%patch3 -p1 -b .docs3
%patch4 -p1 -b .docs4
%patch5 -p1 -b .rust1
%patch47 -p1 -b .rust47
%patch48 -p1 -b .rust48
%patch51 -p1 -b .rust51
%patch53 -p1 -b .rust53
%patch54 -p1 -b .rust54
%build
mkdir -p _build
@ -196,6 +206,9 @@ make check-all || :
%{_libdir}/*.a
%changelog
* Mon Oct 17 2016 Josh Stone <jistone@redhat.com> - 3.9.0-3
- Apply backports from rust-lang/llvm#47, #48, #53, #54
* Sat Oct 15 2016 Josh Stone <jistone@redhat.com> - 3.9.0-2
- Apply an InstCombine backport via rust-lang/llvm#51

272
rust-lang-llvm-pr47.patch Normal file
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@ -0,0 +1,272 @@
From ae32815f9281a5a8d48014e180901fcdb658285a Mon Sep 17 00:00:00 2001
From: David Majnemer <david.majnemer@gmail.com>
Date: Sun, 7 Aug 2016 07:58:00 +0000
Subject: [rust-lang/llvm#47 1/4] [InstCombine] Infer inbounds on geps of
allocas
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277950 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/Transforms/InstCombine/InstructionCombining.cpp | 19 +++++++++++++++++++
test/Transforms/InstCombine/getelementptr.ll | 6 +++---
2 files changed, 22 insertions(+), 3 deletions(-)
diff --git a/lib/Transforms/InstCombine/InstructionCombining.cpp b/lib/Transforms/InstCombine/InstructionCombining.cpp
index 377ccb9c37f7..31b5ad6ae8af 100644
--- a/lib/Transforms/InstCombine/InstructionCombining.cpp
+++ b/lib/Transforms/InstCombine/InstructionCombining.cpp
@@ -1898,6 +1898,25 @@ Instruction *InstCombiner::visitGetElementPtrInst(GetElementPtrInst &GEP) {
}
}
+ if (!GEP.isInBounds()) {
+ unsigned PtrWidth =
+ DL.getPointerSizeInBits(PtrOp->getType()->getPointerAddressSpace());
+ APInt BasePtrOffset(PtrWidth, 0);
+ Value *UnderlyingPtrOp =
+ PtrOp->stripAndAccumulateInBoundsConstantOffsets(DL,
+ BasePtrOffset);
+ if (auto *AI = dyn_cast<AllocaInst>(UnderlyingPtrOp)) {
+ if (GEP.accumulateConstantOffset(DL, BasePtrOffset) &&
+ BasePtrOffset.isNonNegative()) {
+ APInt AllocSize(PtrWidth, DL.getTypeAllocSize(AI->getAllocatedType()));
+ if (BasePtrOffset.ule(AllocSize)) {
+ return GetElementPtrInst::CreateInBounds(
+ PtrOp, makeArrayRef(Ops).slice(1), GEP.getName());
+ }
+ }
+ }
+ }
+
return nullptr;
}
diff --git a/test/Transforms/InstCombine/getelementptr.ll b/test/Transforms/InstCombine/getelementptr.ll
index 7446734e210c..14abd84fd18e 100644
--- a/test/Transforms/InstCombine/getelementptr.ll
+++ b/test/Transforms/InstCombine/getelementptr.ll
@@ -366,7 +366,7 @@ define i32 @test21() {
%rval = load i32, i32* %pbobel
ret i32 %rval
; CHECK-LABEL: @test21(
-; CHECK: getelementptr %intstruct, %intstruct* %pbob1, i64 0, i32 0
+; CHECK: getelementptr inbounds %intstruct, %intstruct* %pbob1, i64 0, i32 0
}
@@ -540,8 +540,8 @@ define i8* @test32(i8* %v) {
%G = load i8*, i8** %F
ret i8* %G
; CHECK-LABEL: @test32(
-; CHECK: %D = getelementptr [4 x i8*], [4 x i8*]* %A, i64 0, i64 1
-; CHECK: %F = getelementptr [4 x i8*], [4 x i8*]* %A, i64 0, i64 2
+; CHECK: %D = getelementptr inbounds [4 x i8*], [4 x i8*]* %A, i64 0, i64 1
+; CHECK: %F = getelementptr inbounds [4 x i8*], [4 x i8*]* %A, i64 0, i64 2
}
; PR3290
--
2.7.4
From d31c987130ff1bf9cea9a287195ecceda91c37d1 Mon Sep 17 00:00:00 2001
From: David Majnemer <david.majnemer@gmail.com>
Date: Sun, 7 Aug 2016 07:58:10 +0000
Subject: [rust-lang/llvm#47 2/4] [InstSimplify] Try hard to simplify pointer
comparisons
Simplify ptrtoint comparisons involving operands with different source
types.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277951 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/Analysis/InstructionSimplify.cpp | 10 ++++++++++
test/Transforms/InstSimplify/compare.ll | 13 +++++++++++++
2 files changed, 23 insertions(+)
diff --git a/lib/Analysis/InstructionSimplify.cpp b/lib/Analysis/InstructionSimplify.cpp
index 7c6edbfca270..8b70d89d62cb 100644
--- a/lib/Analysis/InstructionSimplify.cpp
+++ b/lib/Analysis/InstructionSimplify.cpp
@@ -3092,6 +3092,16 @@ static Value *SimplifyICmpInst(unsigned Predicate, Value *LHS, Value *RHS,
if (LHS->getType()->isPointerTy())
if (auto *C = computePointerICmp(Q.DL, Q.TLI, Q.DT, Pred, Q.CxtI, LHS, RHS))
return C;
+ if (auto *CLHS = dyn_cast<PtrToIntOperator>(LHS))
+ if (auto *CRHS = dyn_cast<PtrToIntOperator>(RHS))
+ if (Q.DL.getTypeSizeInBits(CLHS->getPointerOperandType()) ==
+ Q.DL.getTypeSizeInBits(CLHS->getType()) &&
+ Q.DL.getTypeSizeInBits(CRHS->getPointerOperandType()) ==
+ Q.DL.getTypeSizeInBits(CRHS->getType()))
+ if (auto *C = computePointerICmp(Q.DL, Q.TLI, Q.DT, Pred, Q.CxtI,
+ CLHS->getPointerOperand(),
+ CRHS->getPointerOperand()))
+ return C;
if (GetElementPtrInst *GLHS = dyn_cast<GetElementPtrInst>(LHS)) {
if (GEPOperator *GRHS = dyn_cast<GEPOperator>(RHS)) {
diff --git a/test/Transforms/InstSimplify/compare.ll b/test/Transforms/InstSimplify/compare.ll
index 9d6fd74ae56f..3e7316ec6b48 100644
--- a/test/Transforms/InstSimplify/compare.ll
+++ b/test/Transforms/InstSimplify/compare.ll
@@ -205,6 +205,19 @@ define i1 @gep16(i8* %ptr, i32 %a) {
; CHECK-NEXT: ret i1 false
}
+define i1 @gep17() {
+; CHECK-LABEL: @gep17(
+ %alloca = alloca i32, align 4
+ %bc = bitcast i32* %alloca to [4 x i8]*
+ %gep1 = getelementptr inbounds i32, i32* %alloca, i32 1
+ %pti1 = ptrtoint i32* %gep1 to i32
+ %gep2 = getelementptr inbounds [4 x i8], [4 x i8]* %bc, i32 0, i32 1
+ %pti2 = ptrtoint i8* %gep2 to i32
+ %cmp = icmp ugt i32 %pti1, %pti2
+ ret i1 %cmp
+; CHECK-NEXT: ret i1 true
+}
+
define i1 @zext(i32 %x) {
; CHECK-LABEL: @zext(
%e1 = zext i32 %x to i64
--
2.7.4
From bd3e05cb1f5293635edff14fcf23cfc73985c977 Mon Sep 17 00:00:00 2001
From: David Majnemer <david.majnemer@gmail.com>
Date: Sun, 7 Aug 2016 07:58:12 +0000
Subject: [rust-lang/llvm#47 3/4] [InstSimplify] Fold gep (gep V, C), (sub 0,
V) to C
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277952 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/Analysis/InstructionSimplify.cpp | 20 ++++++++++++++++++++
test/Transforms/InstSimplify/compare.ll | 13 +++++++++++++
2 files changed, 33 insertions(+)
diff --git a/lib/Analysis/InstructionSimplify.cpp b/lib/Analysis/InstructionSimplify.cpp
index 8b70d89d62cb..9d2a47957125 100644
--- a/lib/Analysis/InstructionSimplify.cpp
+++ b/lib/Analysis/InstructionSimplify.cpp
@@ -3597,6 +3597,26 @@ static Value *SimplifyGEPInst(Type *SrcTy, ArrayRef<Value *> Ops,
}
}
+ // gep (gep V, C), (sub 0, V) -> C
+ if (Q.DL.getTypeAllocSize(LastType) == 1 &&
+ all_of(Ops.slice(1).drop_back(1),
+ [](Value *Idx) { return match(Idx, m_Zero()); })) {
+ unsigned PtrWidth =
+ Q.DL.getPointerSizeInBits(Ops[0]->getType()->getPointerAddressSpace());
+ if (Q.DL.getTypeSizeInBits(Ops.back()->getType()) == PtrWidth) {
+ APInt BasePtrOffset(PtrWidth, 0);
+ Value *StrippedBasePtr =
+ Ops[0]->stripAndAccumulateInBoundsConstantOffsets(Q.DL,
+ BasePtrOffset);
+
+ if (match(Ops.back(),
+ m_Sub(m_Zero(), m_PtrToInt(m_Specific(StrippedBasePtr))))) {
+ auto *CI = ConstantInt::get(GEPTy->getContext(), BasePtrOffset);
+ return ConstantExpr::getIntToPtr(CI, GEPTy);
+ }
+ }
+ }
+
// Check to see if this is constant foldable.
for (unsigned i = 0, e = Ops.size(); i != e; ++i)
if (!isa<Constant>(Ops[i]))
diff --git a/test/Transforms/InstSimplify/compare.ll b/test/Transforms/InstSimplify/compare.ll
index 3e7316ec6b48..addb63c57222 100644
--- a/test/Transforms/InstSimplify/compare.ll
+++ b/test/Transforms/InstSimplify/compare.ll
@@ -218,6 +218,19 @@ define i1 @gep17() {
; CHECK-NEXT: ret i1 true
}
+define i32 @gep18() {
+; CHECK-LABEL: @gep18(
+ %alloca = alloca i32, align 4 ; alloca + 0
+ %gep = getelementptr inbounds i32, i32* %alloca, i32 1 ; alloca + 4
+ %bc = bitcast i32* %gep to [4 x i8]* ; alloca + 4
+ %pti = ptrtoint i32* %alloca to i32 ; alloca
+ %sub = sub i32 0, %pti ; -alloca
+ %add = getelementptr [4 x i8], [4 x i8]* %bc, i32 0, i32 %sub ; alloca + 4 - alloca == 4
+ %add_to_int = ptrtoint i8* %add to i32 ; 4
+ ret i32 %add_to_int ; 4
+; CHECK-NEXT: ret i32 4
+}
+
define i1 @zext(i32 %x) {
; CHECK-LABEL: @zext(
%e1 = zext i32 %x to i64
--
2.7.4
From c3eb3c7608f439231d0c1340af6b720f113b4bf4 Mon Sep 17 00:00:00 2001
From: David Majnemer <david.majnemer@gmail.com>
Date: Tue, 16 Aug 2016 06:13:46 +0000
Subject: [rust-lang/llvm#47 4/4] [InstSimplify] Fold gep (gep V, C), (xor V,
-1) to C-1
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@278779 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/Analysis/InstructionSimplify.cpp | 8 +++++++-
test/Transforms/InstSimplify/compare.ll | 13 -------------
2 files changed, 7 insertions(+), 14 deletions(-)
diff --git a/lib/Analysis/InstructionSimplify.cpp b/lib/Analysis/InstructionSimplify.cpp
index 9d2a47957125..f7a435d1ad46 100644
--- a/lib/Analysis/InstructionSimplify.cpp
+++ b/lib/Analysis/InstructionSimplify.cpp
@@ -3597,7 +3597,6 @@ static Value *SimplifyGEPInst(Type *SrcTy, ArrayRef<Value *> Ops,
}
}
- // gep (gep V, C), (sub 0, V) -> C
if (Q.DL.getTypeAllocSize(LastType) == 1 &&
all_of(Ops.slice(1).drop_back(1),
[](Value *Idx) { return match(Idx, m_Zero()); })) {
@@ -3609,11 +3608,18 @@ static Value *SimplifyGEPInst(Type *SrcTy, ArrayRef<Value *> Ops,
Ops[0]->stripAndAccumulateInBoundsConstantOffsets(Q.DL,
BasePtrOffset);
+ // gep (gep V, C), (sub 0, V) -> C
if (match(Ops.back(),
m_Sub(m_Zero(), m_PtrToInt(m_Specific(StrippedBasePtr))))) {
auto *CI = ConstantInt::get(GEPTy->getContext(), BasePtrOffset);
return ConstantExpr::getIntToPtr(CI, GEPTy);
}
+ // gep (gep V, C), (xor V, -1) -> C-1
+ if (match(Ops.back(),
+ m_Xor(m_PtrToInt(m_Specific(StrippedBasePtr)), m_AllOnes()))) {
+ auto *CI = ConstantInt::get(GEPTy->getContext(), BasePtrOffset - 1);
+ return ConstantExpr::getIntToPtr(CI, GEPTy);
+ }
}
}
diff --git a/test/Transforms/InstSimplify/compare.ll b/test/Transforms/InstSimplify/compare.ll
index addb63c57222..3e7316ec6b48 100644
--- a/test/Transforms/InstSimplify/compare.ll
+++ b/test/Transforms/InstSimplify/compare.ll
@@ -218,19 +218,6 @@ define i1 @gep17() {
; CHECK-NEXT: ret i1 true
}
-define i32 @gep18() {
-; CHECK-LABEL: @gep18(
- %alloca = alloca i32, align 4 ; alloca + 0
- %gep = getelementptr inbounds i32, i32* %alloca, i32 1 ; alloca + 4
- %bc = bitcast i32* %gep to [4 x i8]* ; alloca + 4
- %pti = ptrtoint i32* %alloca to i32 ; alloca
- %sub = sub i32 0, %pti ; -alloca
- %add = getelementptr [4 x i8], [4 x i8]* %bc, i32 0, i32 %sub ; alloca + 4 - alloca == 4
- %add_to_int = ptrtoint i8* %add to i32 ; 4
- ret i32 %add_to_int ; 4
-; CHECK-NEXT: ret i32 4
-}
-
define i1 @zext(i32 %x) {
; CHECK-LABEL: @zext(
%e1 = zext i32 %x to i64
--
2.7.4

84
rust-lang-llvm-pr48.patch Normal file
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@ -0,0 +1,84 @@
From eee68eafa7e8e4ce996b49f5551636639a6c331a Mon Sep 17 00:00:00 2001
From: David Majnemer <david.majnemer@gmail.com>
Date: Mon, 29 Aug 2016 17:14:08 +0000
Subject: [rust-lang/llvm#48] [SimplifyCFG] Hoisting invalidates metadata
We forgot to remove optimization metadata when performing hosting during
FoldTwoEntryPHINode.
This fixes PR29163.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@279980 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/Transforms/Utils/SimplifyCFG.cpp | 10 ++++++++--
test/Transforms/SimplifyCFG/PR29163.ll | 31 +++++++++++++++++++++++++++++++
2 files changed, 39 insertions(+), 2 deletions(-)
create mode 100644 test/Transforms/SimplifyCFG/PR29163.ll
diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp
index 0504646c304e..c197317ac771 100644
--- a/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -2024,14 +2024,20 @@ static bool FoldTwoEntryPHINode(PHINode *PN, const TargetTransformInfo &TTI,
// Move all 'aggressive' instructions, which are defined in the
// conditional parts of the if's up to the dominating block.
- if (IfBlock1)
+ if (IfBlock1) {
+ for (auto &I : *IfBlock1)
+ I.dropUnknownNonDebugMetadata();
DomBlock->getInstList().splice(InsertPt->getIterator(),
IfBlock1->getInstList(), IfBlock1->begin(),
IfBlock1->getTerminator()->getIterator());
- if (IfBlock2)
+ }
+ if (IfBlock2) {
+ for (auto &I : *IfBlock2)
+ I.dropUnknownNonDebugMetadata();
DomBlock->getInstList().splice(InsertPt->getIterator(),
IfBlock2->getInstList(), IfBlock2->begin(),
IfBlock2->getTerminator()->getIterator());
+ }
while (PHINode *PN = dyn_cast<PHINode>(BB->begin())) {
// Change the PHI node into a select instruction.
diff --git a/test/Transforms/SimplifyCFG/PR29163.ll b/test/Transforms/SimplifyCFG/PR29163.ll
new file mode 100644
index 000000000000..65f9090dd135
--- /dev/null
+++ b/test/Transforms/SimplifyCFG/PR29163.ll
@@ -0,0 +1,31 @@
+; RUN: opt -S -simplifycfg < %s | FileCheck %s
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+@GV = external constant i64*
+
+define i64* @test1(i1 %cond, i8* %P) {
+entry:
+ br i1 %cond, label %if, label %then
+
+then:
+ %bc = bitcast i8* %P to i64*
+ br label %join
+
+if:
+ %load = load i64*, i64** @GV, align 8, !dereferenceable !0
+ br label %join
+
+join:
+ %phi = phi i64* [ %bc, %then ], [ %load, %if ]
+ ret i64* %phi
+}
+
+; CHECK-LABEL: define i64* @test1(
+; CHECK: %[[bc:.*]] = bitcast i8* %P to i64*
+; CHECK: %[[load:.*]] = load i64*, i64** @GV, align 8{{$}}
+; CHECK: %[[phi:.*]] = select i1 %cond, i64* %[[load]], i64* %[[bc]]
+; CHECK: ret i64* %[[phi]]
+
+
+!0 = !{i64 8}
--
2.7.4

2
0001-Backport-rL281650.patch → rust-lang-llvm-pr51.patch
View file

@ -1,7 +1,7 @@
From 7801978ec1f3637fcda1b564048ebc732bf586af Mon Sep 17 00:00:00 2001
From: Simonas Kazlauskas <git@kazlauskas.me>
Date: Fri, 16 Sep 2016 00:32:20 +0300
Subject: [PATCH] Backport rL281650
Subject: [rust-lang/llvm#51] Backport rL281650
---
lib/Transforms/InstCombine/InstCombineCompares.cpp | 2 +-

883
rust-lang-llvm-pr53.patch Normal file
View file

@ -0,0 +1,883 @@
From 0d4331af6e01235479e44f9775b3fde9e19200a3 Mon Sep 17 00:00:00 2001
From: Keith Walker <kwalker@arm.com>
Date: Tue, 27 Sep 2016 16:46:07 +0000
Subject: [rust-lang/llvm#53 1/2] Propagate DBG_VALUE entries when there are
unvisited predecessors
Variables are sometimes missing their debug location information in
blocks in which the variables should be available. This would occur
when one or more predecessor blocks had not yet been visited by the
routine which propagated the information from predecessor blocks.
This is addressed by only considering predecessor blocks which have
already been visited.
The solution to this problem was suggested by Daniel Berlin on the
LLVM developer mailing list.
Differential Revision: https://reviews.llvm.org/D24927
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282506 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/CodeGen/LiveDebugValues.cpp | 34 ++--
test/CodeGen/ARM/dbg-range-extension.mir | 282 +++++++++++++++++++++++++++++++
2 files changed, 306 insertions(+), 10 deletions(-)
create mode 100644 test/CodeGen/ARM/dbg-range-extension.mir
diff --git a/lib/CodeGen/LiveDebugValues.cpp b/lib/CodeGen/LiveDebugValues.cpp
index 4ff88d528108..4cadd5855ed5 100644
--- a/lib/CodeGen/LiveDebugValues.cpp
+++ b/lib/CodeGen/LiveDebugValues.cpp
@@ -201,7 +201,8 @@ private:
VarLocInMBB &OutLocs, VarLocMap &VarLocIDs);
bool join(MachineBasicBlock &MBB, VarLocInMBB &OutLocs, VarLocInMBB &InLocs,
- const VarLocMap &VarLocIDs);
+ const VarLocMap &VarLocIDs,
+ SmallPtrSet<const MachineBasicBlock *, 16> &Visited);
bool ExtendRanges(MachineFunction &MF);
@@ -368,7 +369,8 @@ bool LiveDebugValues::transfer(MachineInstr &MI, OpenRangesSet &OpenRanges,
/// inserting a new DBG_VALUE instruction at the start of the @MBB - if the same
/// source variable in all the predecessors of @MBB reside in the same location.
bool LiveDebugValues::join(MachineBasicBlock &MBB, VarLocInMBB &OutLocs,
- VarLocInMBB &InLocs, const VarLocMap &VarLocIDs) {
+ VarLocInMBB &InLocs, const VarLocMap &VarLocIDs,
+ SmallPtrSet<const MachineBasicBlock *, 16> &Visited) {
DEBUG(dbgs() << "join MBB: " << MBB.getName() << "\n");
bool Changed = false;
@@ -376,21 +378,32 @@ bool LiveDebugValues::join(MachineBasicBlock &MBB, VarLocInMBB &OutLocs,
// For all predecessors of this MBB, find the set of VarLocs that
// can be joined.
+ int NumVisited = 0;
for (auto p : MBB.predecessors()) {
+ // Ignore unvisited predecessor blocks. As we are processing
+ // the blocks in reverse post-order any unvisited block can
+ // be considered to not remove any incoming values.
+ if (!Visited.count(p))
+ continue;
auto OL = OutLocs.find(p);
// Join is null in case of empty OutLocs from any of the pred.
if (OL == OutLocs.end())
return false;
- // Just copy over the Out locs to incoming locs for the first predecessor.
- if (p == *MBB.pred_begin()) {
+ // Just copy over the Out locs to incoming locs for the first visited
+ // predecessor, and for all other predecessors join the Out locs.
+ if (!NumVisited)
InLocsT = OL->second;
- continue;
- }
- // Join with this predecessor.
- InLocsT &= OL->second;
+ else
+ InLocsT &= OL->second;
+ NumVisited++;
}
+ // As we are processing blocks in reverse post-order we
+ // should have processed at least one predecessor, unless it
+ // is the entry block which has no predecessor.
+ assert((NumVisited || MBB.pred_empty()) &&
+ "Should have processed at least one predecessor");
if (InLocsT.empty())
return false;
@@ -463,6 +476,7 @@ bool LiveDebugValues::ExtendRanges(MachineFunction &MF) {
// To solve it, we perform join() and transfer() using the two worklist method
// until the ranges converge.
// Ranges have converged when both worklists are empty.
+ SmallPtrSet<const MachineBasicBlock *, 16> Visited;
while (!Worklist.empty() || !Pending.empty()) {
// We track what is on the pending worklist to avoid inserting the same
// thing twice. We could avoid this with a custom priority queue, but this
@@ -471,8 +485,8 @@ bool LiveDebugValues::ExtendRanges(MachineFunction &MF) {
while (!Worklist.empty()) {
MachineBasicBlock *MBB = OrderToBB[Worklist.top()];
Worklist.pop();
- MBBJoined = join(*MBB, OutLocs, InLocs, VarLocIDs);
-
+ MBBJoined = join(*MBB, OutLocs, InLocs, VarLocIDs, Visited);
+ Visited.insert(MBB);
if (MBBJoined) {
MBBJoined = false;
Changed = true;
diff --git a/test/CodeGen/ARM/dbg-range-extension.mir b/test/CodeGen/ARM/dbg-range-extension.mir
new file mode 100644
index 000000000000..b18f56197948
--- /dev/null
+++ b/test/CodeGen/ARM/dbg-range-extension.mir
@@ -0,0 +1,282 @@
+# RUN: llc -mtriple=arm-eabi -run-pass=livedebugvalues %s -o - | FileCheck %s
+#
+# Check that the debug information for variables are propagated into the correct blocks.
+#
+# Generated from the C source:
+#
+# int func2(int, int);
+# void func(int a) {
+# int b = func2(10, 11);
+# if (a) {
+# int c = func2(12, 13);
+# for(int i = 1; i < a; i++) {
+# func2(i, i+b);
+# }
+# func2(b,c);
+# }
+# func2(b,a);
+# }
+
+# CHECK: [[VAR_A:![0-9]+]] = !DILocalVariable(name: "a",
+# CHECK: [[VAR_B:![0-9]+]] = !DILocalVariable(name: "b",
+# CHECK: [[VAR_C:![0-9]+]] = !DILocalVariable(name: "c",
+# CHECK: [[VAR_I:![0-9]+]] = !DILocalVariable(name: "i",
+
+# CHECK: bb.0.entry
+# CHECK: DBG_VALUE debug-use %r0, debug-use _, [[VAR_A]]
+# CHECK: DBG_VALUE debug-use [[REG_A:%r[0-9]+]], debug-use _, [[VAR_A]]
+# CHECK: DBG_VALUE debug-use [[REG_B:%r[0-9]+]], debug-use _, [[VAR_B]]
+
+# CHECK: bb.1.if.then
+# CHECK: DBG_VALUE debug-use [[REG_B]], debug-use _, [[VAR_B]]
+# CHECK: DBG_VALUE debug-use [[REG_A]], debug-use _, [[VAR_A]]
+# CHECK: DBG_VALUE debug-use [[REG_C:%r[0-9]+]], debug-use _, [[VAR_C]]
+# CHECK: DBG_VALUE 1, 0, [[VAR_I]]
+
+# CHECK: bb.2.for.body
+# CHECK: DBG_VALUE debug-use [[REG_I:%r[0-9]+]], debug-use _, [[VAR_I]]
+# CHECK: DBG_VALUE debug-use [[REG_C]], debug-use _, [[VAR_C]]
+# CHECK: DBG_VALUE debug-use [[REG_B]], debug-use _, [[VAR_B]]
+# CHECK: DBG_VALUE debug-use [[REG_A]], debug-use _, [[VAR_A]]
+# CHECK: DBG_VALUE debug-use [[REG_I]], debug-use _, [[VAR_I]]
+
+# CHECK: bb.3.for.cond
+# CHECK: DBG_VALUE debug-use [[REG_C]], debug-use _, [[VAR_C]]
+# CHECK: DBG_VALUE debug-use [[REG_B]], debug-use _, [[VAR_B]]
+# CHECK: DBG_VALUE debug-use [[REG_A]], debug-use _, [[VAR_A]]
+# CHECK: DBG_VALUE debug-use [[REG_I]], debug-use _, [[VAR_I]]
+
+# CHECK: bb.4.for.cond.cleanup
+# CHECK: DBG_VALUE debug-use [[REG_I]], debug-use _, [[VAR_I]]
+# CHECK: DBG_VALUE debug-use [[REG_C]], debug-use _, [[VAR_C]]
+# CHECK: DBG_VALUE debug-use [[REG_B]], debug-use _, [[VAR_B]]
+# CHECK: DBG_VALUE debug-use [[REG_A]], debug-use _, [[VAR_A]]
+
+# CHECK: bb.5.if.end
+# CHECK: DBG_VALUE debug-use [[REG_B]], debug-use _, [[VAR_B]]
+# CHECK: DBG_VALUE debug-use [[REG_A]], debug-use _, [[VAR_A]]
+--- |
+ ; ModuleID = '/data/kwalker/work/OpenSource-llvm/llvm/test/CodeGen/ARM/dbg-range-extension.ll'
+ source_filename = "/data/kwalker/work/OpenSource-llvm/llvm/test/CodeGen/ARM/dbg-range-extension.ll"
+ target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
+ target triple = "arm---eabi"
+
+ ; Function Attrs: minsize nounwind optsize
+ define void @func(i32 %a) local_unnamed_addr #0 !dbg !8 {
+ entry:
+ tail call void @llvm.dbg.value(metadata i32 %a, i64 0, metadata !13, metadata !20), !dbg !21
+ %call = tail call i32 @func2(i32 10, i32 11) #0, !dbg !22
+ tail call void @llvm.dbg.value(metadata i32 %call, i64 0, metadata !14, metadata !20), !dbg !23
+ %tobool = icmp eq i32 %a, 0, !dbg !24
+ br i1 %tobool, label %if.end, label %if.then, !dbg !25
+
+ if.then: ; preds = %entry
+ %call1 = tail call i32 @func2(i32 12, i32 13) #0, !dbg !26
+ tail call void @llvm.dbg.value(metadata i32 %call1, i64 0, metadata !15, metadata !20), !dbg !27
+ tail call void @llvm.dbg.value(metadata i32 1, i64 0, metadata !18, metadata !20), !dbg !28
+ br label %for.cond, !dbg !29
+
+ for.cond: ; preds = %for.body, %if.then
+ %i.0 = phi i32 [ 1, %if.then ], [ %inc, %for.body ]
+ tail call void @llvm.dbg.value(metadata i32 %i.0, i64 0, metadata !18, metadata !20), !dbg !28
+ %cmp = icmp slt i32 %i.0, %a, !dbg !30
+ br i1 %cmp, label %for.body, label %for.cond.cleanup, !dbg !33
+
+ for.cond.cleanup: ; preds = %for.cond
+ %call3 = tail call i32 @func2(i32 %call, i32 %call1) #0, !dbg !34
+ br label %if.end, !dbg !35
+
+ for.body: ; preds = %for.cond
+ %0 = add i32 %call, %i.0, !dbg !36
+ %call2 = tail call i32 @func2(i32 %i.0, i32 %0) #0, !dbg !36
+ %inc = add nuw nsw i32 %i.0, 1, !dbg !38
+ tail call void @llvm.dbg.value(metadata i32 %inc, i64 0, metadata !18, metadata !20), !dbg !28
+ br label %for.cond, !dbg !40, !llvm.loop !41
+
+ if.end: ; preds = %for.cond.cleanup, %entry
+ %call4 = tail call i32 @func2(i32 %call, i32 %a) #0, !dbg !43
+ ret void, !dbg !44
+ }
+
+ ; Function Attrs: minsize optsize
+ declare i32 @func2(i32, i32) local_unnamed_addr #1
+
+ ; Function Attrs: nounwind readnone
+ declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
+
+ ; Function Attrs: nounwind
+ declare void @llvm.stackprotector(i8*, i8**) #3
+
+ attributes #0 = { minsize nounwind optsize }
+ attributes #1 = { minsize optsize }
+ attributes #2 = { nounwind readnone }
+ attributes #3 = { nounwind }
+
+ !llvm.dbg.cu = !{!0}
+ !llvm.module.flags = !{!3, !4, !5, !6}
+ !llvm.ident = !{!7}
+
+ !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
+ !1 = !DIFile(filename: "loop.c", directory: "/tmp")
+ !2 = !{}
+ !3 = !{i32 2, !"Dwarf Version", i32 4}
+ !4 = !{i32 2, !"Debug Info Version", i32 3}
+ !5 = !{i32 1, !"wchar_size", i32 4}
+ !6 = !{i32 1, !"min_enum_size", i32 4}
+ !7 = !{!"clang version 4.0.0 (http://llvm.org/git/clang.git b8f10df3679b36f51e1de7c4351b82d297825089) (http://llvm.org/git/llvm.git c2a5d16d1e3b8c49f5bbb1ff87a76ac4f88edb89)"}
+ !8 = distinct !DISubprogram(name: "func", scope: !1, file: !1, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !12)
+ !9 = !DISubroutineType(types: !10)
+ !10 = !{null, !11}
+ !11 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+ !12 = !{!13, !14, !15, !18}
+ !13 = !DILocalVariable(name: "a", arg: 1, scope: !8, file: !1, line: 2, type: !11)
+ !14 = !DILocalVariable(name: "b", scope: !8, file: !1, line: 3, type: !11)
+ !15 = !DILocalVariable(name: "c", scope: !16, file: !1, line: 5, type: !11)
+ !16 = distinct !DILexicalBlock(scope: !17, file: !1, line: 4, column: 9)
+ !17 = distinct !DILexicalBlock(scope: !8, file: !1, line: 4, column: 6)
+ !18 = !DILocalVariable(name: "i", scope: !19, file: !1, line: 6, type: !11)
+ !19 = distinct !DILexicalBlock(scope: !16, file: !1, line: 6, column: 3)
+ !20 = !DIExpression()
+ !21 = !DILocation(line: 2, column: 15, scope: !8)
+ !22 = !DILocation(line: 3, column: 17, scope: !8)
+ !23 = !DILocation(line: 3, column: 13, scope: !8)
+ !24 = !DILocation(line: 4, column: 6, scope: !17)
+ !25 = !DILocation(line: 4, column: 6, scope: !8)
+ !26 = !DILocation(line: 5, column: 11, scope: !16)
+ !27 = !DILocation(line: 5, column: 7, scope: !16)
+ !28 = !DILocation(line: 6, column: 11, scope: !19)
+ !29 = !DILocation(line: 6, column: 7, scope: !19)
+ !30 = !DILocation(line: 6, column: 20, scope: !31)
+ !31 = !DILexicalBlockFile(scope: !32, file: !1, discriminator: 1)
+ !32 = distinct !DILexicalBlock(scope: !19, file: !1, line: 6, column: 3)
+ !33 = !DILocation(line: 6, column: 3, scope: !31)
+ !34 = !DILocation(line: 9, column: 3, scope: !16)
+ !35 = !DILocation(line: 10, column: 2, scope: !16)
+ !36 = !DILocation(line: 7, column: 4, scope: !37)
+ !37 = distinct !DILexicalBlock(scope: !32, file: !1, line: 6, column: 30)
+ !38 = !DILocation(line: 6, column: 26, scope: !39)
+ !39 = !DILexicalBlockFile(scope: !32, file: !1, discriminator: 3)
+ !40 = !DILocation(line: 6, column: 3, scope: !39)
+ !41 = distinct !{!41, !42}
+ !42 = !DILocation(line: 6, column: 3, scope: !16)
+ !43 = !DILocation(line: 11, column: 2, scope: !8)
+ !44 = !DILocation(line: 12, column: 1, scope: !8)
+
+...
+---
+name: func
+alignment: 2
+exposesReturnsTwice: false
+legalized: false
+regBankSelected: false
+selected: false
+tracksRegLiveness: false
+liveins:
+ - { reg: '%r0' }
+calleeSavedRegisters: [ '%lr', '%d8', '%d9', '%d10', '%d11', '%d12', '%d13',
+ '%d14', '%d15', '%q4', '%q5', '%q6', '%q7', '%r4',
+ '%r5', '%r6', '%r7', '%r8', '%r9', '%r10', '%r11',
+ '%s16', '%s17', '%s18', '%s19', '%s20', '%s21',
+ '%s22', '%s23', '%s24', '%s25', '%s26', '%s27',
+ '%s28', '%s29', '%s30', '%s31', '%d8_d10', '%d9_d11',
+ '%d10_d12', '%d11_d13', '%d12_d14', '%d13_d15',
+ '%q4_q5', '%q5_q6', '%q6_q7', '%q4_q5_q6_q7', '%r4_r5',
+ '%r6_r7', '%r8_r9', '%r10_r11', '%d8_d9_d10', '%d9_d10_d11',
+ '%d10_d11_d12', '%d11_d12_d13', '%d12_d13_d14',
+ '%d13_d14_d15', '%d8_d10_d12', '%d9_d11_d13', '%d10_d12_d14',
+ '%d11_d13_d15', '%d8_d10_d12_d14', '%d9_d11_d13_d15',
+ '%d9_d10', '%d11_d12', '%d13_d14', '%d9_d10_d11_d12',
+ '%d11_d12_d13_d14' ]
+frameInfo:
+ isFrameAddressTaken: false
+ isReturnAddressTaken: false
+ hasStackMap: false
+ hasPatchPoint: false
+ stackSize: 24
+ offsetAdjustment: 0
+ maxAlignment: 4
+ adjustsStack: true
+ hasCalls: true
+ maxCallFrameSize: 0
+ hasOpaqueSPAdjustment: false
+ hasVAStart: false
+ hasMustTailInVarArgFunc: false
+stack:
+ - { id: 0, type: spill-slot, offset: -4, size: 4, alignment: 4, callee-saved-register: '%lr' }
+ - { id: 1, type: spill-slot, offset: -8, size: 4, alignment: 4, callee-saved-register: '%r11' }
+ - { id: 2, type: spill-slot, offset: -12, size: 4, alignment: 4, callee-saved-register: '%r7' }
+ - { id: 3, type: spill-slot, offset: -16, size: 4, alignment: 4, callee-saved-register: '%r6' }
+ - { id: 4, type: spill-slot, offset: -20, size: 4, alignment: 4, callee-saved-register: '%r5' }
+ - { id: 5, type: spill-slot, offset: -24, size: 4, alignment: 4, callee-saved-register: '%r4' }
+body: |
+ bb.0.entry:
+ successors: %bb.5.if.end, %bb.1.if.then
+ liveins: %r0, %r4, %r5, %r6, %r7, %r11, %lr
+
+ %sp = frame-setup STMDB_UPD %sp, 14, _, killed %r4, killed %r5, killed %r6, killed %r7, killed %r11, killed %lr
+ frame-setup CFI_INSTRUCTION def_cfa_offset 24
+ frame-setup CFI_INSTRUCTION offset %lr, -4
+ frame-setup CFI_INSTRUCTION offset %r11, -8
+ frame-setup CFI_INSTRUCTION offset %r7, -12
+ frame-setup CFI_INSTRUCTION offset %r6, -16
+ frame-setup CFI_INSTRUCTION offset %r5, -20
+ frame-setup CFI_INSTRUCTION offset %r4, -24
+ DBG_VALUE debug-use %r0, debug-use _, !13, !20, debug-location !21
+ %r4 = MOVr killed %r0, 14, _, _
+ DBG_VALUE debug-use %r4, debug-use _, !13, !20, debug-location !21
+ %r0 = MOVi 10, 14, _, _, debug-location !22
+ %r1 = MOVi 11, 14, _, _, debug-location !22
+ BL @func2, csr_aapcs, implicit-def dead %lr, implicit %sp, implicit killed %r0, implicit killed %r1, implicit-def %sp, implicit-def %r0, debug-location !22
+ %r5 = MOVr killed %r0, 14, _, _, debug-location !22
+ DBG_VALUE debug-use %r5, debug-use _, !14, !20, debug-location !23
+ CMPri %r4, 0, 14, _, implicit-def %cpsr, debug-location !25
+ Bcc %bb.5.if.end, 0, killed %cpsr
+
+ bb.1.if.then:
+ successors: %bb.3.for.cond
+ liveins: %r4, %r5
+
+ %r0 = MOVi 12, 14, _, _, debug-location !26
+ %r1 = MOVi 13, 14, _, _, debug-location !26
+ BL @func2, csr_aapcs, implicit-def dead %lr, implicit %sp, implicit killed %r0, implicit killed %r1, implicit-def %sp, implicit-def %r0, debug-location !26
+ %r6 = MOVr killed %r0, 14, _, _, debug-location !26
+ DBG_VALUE debug-use %r6, debug-use _, !15, !20, debug-location !27
+ %r7 = MOVi 1, 14, _, _
+ DBG_VALUE 1, 0, !18, !20, debug-location !28
+ B %bb.3.for.cond
+
+ bb.2.for.body:
+ successors: %bb.3.for.cond
+ liveins: %r4, %r5, %r6, %r7
+
+ %r1 = ADDrr %r5, %r7, 14, _, _, debug-location !36
+ %r0 = MOVr %r7, 14, _, _, debug-location !36
+ BL @func2, csr_aapcs, implicit-def dead %lr, implicit %sp, implicit killed %r0, implicit killed %r1, implicit-def %sp, implicit-def dead %r0, debug-location !36
+ %r7 = ADDri killed %r7, 1, 14, _, _, debug-location !38
+ DBG_VALUE debug-use %r7, debug-use _, !18, !20, debug-location !28
+
+ bb.3.for.cond:
+ successors: %bb.2.for.body, %bb.4.for.cond.cleanup
+ liveins: %r4, %r5, %r6, %r7
+
+ DBG_VALUE debug-use %r7, debug-use _, !18, !20, debug-location !28
+ CMPrr %r7, %r4, 14, _, implicit-def %cpsr, debug-location !33
+ Bcc %bb.2.for.body, 11, killed %cpsr, debug-location !33
+
+ bb.4.for.cond.cleanup:
+ successors: %bb.5.if.end
+ liveins: %r4, %r5, %r6
+
+ %r0 = MOVr %r5, 14, _, _, debug-location !34
+ %r1 = MOVr killed %r6, 14, _, _, debug-location !34
+ BL @func2, csr_aapcs, implicit-def dead %lr, implicit %sp, implicit killed %r0, implicit killed %r1, implicit-def %sp, implicit-def dead %r0, debug-location !34
+
+ bb.5.if.end:
+ liveins: %r4, %r5
+
+ %r0 = MOVr killed %r5, 14, _, _, debug-location !43
+ %r1 = MOVr killed %r4, 14, _, _, debug-location !43
+ %sp = LDMIA_UPD %sp, 14, _, def %r4, def %r5, def %r6, def %r7, def %r11, def %lr, debug-location !43
+ TAILJMPd @func2, implicit %sp, implicit %sp, implicit killed %r0, implicit killed %r1, debug-location !43
+
+...
--
2.7.4
From 8a0fc26559123bb6eab3ceae93d5a2c94943614b Mon Sep 17 00:00:00 2001
From: Adrian Prantl <aprantl@apple.com>
Date: Wed, 28 Sep 2016 17:51:14 +0000
Subject: [rust-lang/llvm#53 2/2] Teach LiveDebugValues about lexical scopes.
This addresses PR26055 LiveDebugValues is very slow.
Contrary to the old LiveDebugVariables pass LiveDebugValues currently
doesn't look at the lexical scopes before inserting a DBG_VALUE
intrinsic. This means that we often propagate DBG_VALUEs much further
down than necessary. This is especially noticeable in large C++
functions with many inlined method calls that all use the same
"this"-pointer.
For example, in the following code it makes no sense to propagate the
inlined variable a from the first inlined call to f() into any of the
subsequent basic blocks, because the variable will always be out of
scope:
void sink(int a);
void __attribute((always_inline)) f(int a) { sink(a); }
void foo(int i) {
f(i);
if (i)
f(i);
f(i);
}
This patch reuses the LexicalScopes infrastructure we have for
LiveDebugVariables to take this into account.
The effect on compile time and memory consumption is quite noticeable:
I tested a benchmark that is a large C++ source with an enormous
amount of inlined "this"-pointers that would previously eat >24GiB
(most of them for DBG_VALUE intrinsics) and whose compile time was
dominated by LiveDebugValues. With this patch applied the memory
consumption is 1GiB and 1.7% of the time is spent in LiveDebugValues.
https://reviews.llvm.org/D24994
Thanks to Daniel Berlin and Keith Walker for reviewing!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282611 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/CodeGen/LiveDebugValues.cpp | 51 ++++-
test/CodeGen/ARM/dbg-range-extension.mir | 1 -
test/DebugInfo/COFF/register-variables.ll | 8 +-
test/DebugInfo/MIR/X86/livedebugvalues-limit.mir | 228 +++++++++++++++++++++++
test/DebugInfo/X86/fission-ranges.ll | 6 +-
5 files changed, 278 insertions(+), 16 deletions(-)
create mode 100644 test/DebugInfo/MIR/X86/livedebugvalues-limit.mir
diff --git a/lib/CodeGen/LiveDebugValues.cpp b/lib/CodeGen/LiveDebugValues.cpp
index 4cadd5855ed5..969944eb24a2 100644
--- a/lib/CodeGen/LiveDebugValues.cpp
+++ b/lib/CodeGen/LiveDebugValues.cpp
@@ -23,6 +23,7 @@
#include "llvm/ADT/SparseBitVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/UniqueVector.h"
+#include "llvm/CodeGen/LexicalScopes.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
@@ -60,6 +61,26 @@ class LiveDebugValues : public MachineFunctionPass {
private:
const TargetRegisterInfo *TRI;
const TargetInstrInfo *TII;
+ LexicalScopes LS;
+
+ /// Keeps track of lexical scopes associated with a user value's source
+ /// location.
+ class UserValueScopes {
+ DebugLoc DL;
+ LexicalScopes &LS;
+ SmallPtrSet<const MachineBasicBlock *, 4> LBlocks;
+
+ public:
+ UserValueScopes(DebugLoc D, LexicalScopes &L) : DL(std::move(D)), LS(L) {}
+
+ /// Return true if current scope dominates at least one machine
+ /// instruction in a given machine basic block.
+ bool dominates(MachineBasicBlock *MBB) {
+ if (LBlocks.empty())
+ LS.getMachineBasicBlocks(DL, LBlocks);
+ return LBlocks.count(MBB) != 0 || LS.dominates(DL, MBB);
+ }
+ };
/// Based on std::pair so it can be used as an index into a DenseMap.
typedef std::pair<const DILocalVariable *, const DILocation *>
@@ -83,7 +104,7 @@ private:
struct VarLoc {
const DebugVariable Var;
const MachineInstr &MI; ///< Only used for cloning a new DBG_VALUE.
-
+ mutable UserValueScopes UVS;
enum { InvalidKind = 0, RegisterKind } Kind;
/// The value location. Stored separately to avoid repeatedly
@@ -96,9 +117,9 @@ private:
uint64_t Hash;
} Loc;
- VarLoc(const MachineInstr &MI)
+ VarLoc(const MachineInstr &MI, LexicalScopes &LS)
: Var(MI.getDebugVariable(), MI.getDebugLoc()->getInlinedAt()), MI(MI),
- Kind(InvalidKind) {
+ UVS(MI.getDebugLoc(), LS), Kind(InvalidKind) {
static_assert((sizeof(Loc) == sizeof(uint64_t)),
"hash does not cover all members of Loc");
assert(MI.isDebugValue() && "not a DBG_VALUE");
@@ -125,6 +146,10 @@ private:
return 0;
}
+ /// Determine whether the lexical scope of this value's debug location
+ /// dominates MBB.
+ bool dominates(MachineBasicBlock &MBB) const { return UVS.dominates(&MBB); }
+
void dump() const { MI.dump(); }
bool operator==(const VarLoc &Other) const {
@@ -229,6 +254,7 @@ public:
/// Calculate the liveness information for the given machine function.
bool runOnMachineFunction(MachineFunction &MF) override;
};
+
} // namespace
//===----------------------------------------------------------------------===//
@@ -295,7 +321,7 @@ void LiveDebugValues::transferDebugValue(const MachineInstr &MI,
// Add the VarLoc to OpenRanges from this DBG_VALUE.
// TODO: Currently handles DBG_VALUE which has only reg as location.
if (isDbgValueDescribedByReg(MI)) {
- VarLoc VL(MI);
+ VarLoc VL(MI, LS);
unsigned ID = VarLocIDs.insert(VL);
OpenRanges.insert(ID, VL.Var);
}
@@ -399,6 +425,13 @@ bool LiveDebugValues::join(MachineBasicBlock &MBB, VarLocInMBB &OutLocs,
NumVisited++;
}
+ // Filter out DBG_VALUES that are out of scope.
+ VarLocSet KillSet;
+ for (auto ID : InLocsT)
+ if (!VarLocIDs[ID].dominates(MBB))
+ KillSet.set(ID);
+ InLocsT.intersectWithComplement(KillSet);
+
// As we are processing blocks in reverse post-order we
// should have processed at least one predecessor, unless it
// is the entry block which has no predecessor.
@@ -519,12 +552,14 @@ bool LiveDebugValues::ExtendRanges(MachineFunction &MF) {
}
bool LiveDebugValues::runOnMachineFunction(MachineFunction &MF) {
+ if (!MF.getFunction()->getSubprogram())
+ // LiveDebugValues will already have removed all DBG_VALUEs.
+ return false;
+
TRI = MF.getSubtarget().getRegisterInfo();
TII = MF.getSubtarget().getInstrInfo();
+ LS.initialize(MF);
- bool Changed = false;
-
- Changed |= ExtendRanges(MF);
-
+ bool Changed = ExtendRanges(MF);
return Changed;
}
diff --git a/test/CodeGen/ARM/dbg-range-extension.mir b/test/CodeGen/ARM/dbg-range-extension.mir
index b18f56197948..466f69396948 100644
--- a/test/CodeGen/ARM/dbg-range-extension.mir
+++ b/test/CodeGen/ARM/dbg-range-extension.mir
@@ -47,7 +47,6 @@
# CHECK: DBG_VALUE debug-use [[REG_I]], debug-use _, [[VAR_I]]
# CHECK: bb.4.for.cond.cleanup
-# CHECK: DBG_VALUE debug-use [[REG_I]], debug-use _, [[VAR_I]]
# CHECK: DBG_VALUE debug-use [[REG_C]], debug-use _, [[VAR_C]]
# CHECK: DBG_VALUE debug-use [[REG_B]], debug-use _, [[VAR_B]]
# CHECK: DBG_VALUE debug-use [[REG_A]], debug-use _, [[VAR_A]]
diff --git a/test/DebugInfo/COFF/register-variables.ll b/test/DebugInfo/COFF/register-variables.ll
index 9bb782853a3d..08246fef9603 100644
--- a/test/DebugInfo/COFF/register-variables.ll
+++ b/test/DebugInfo/COFF/register-variables.ll
@@ -37,8 +37,8 @@
; ASM: #DEBUG_VALUE: c <- %EAX
; ASM: testl %esi, %esi
; ASM: je .LBB0_2
+; ASM: [[after_je:\.Ltmp.*]]:
; ASM: # BB#1: # %if.then
-; ASM-DAG: #DEBUG_VALUE: c <- %EAX
; ASM-DAG: #DEBUG_VALUE: inlineinc:a <- %EAX
; ASM-DAG: #DEBUG_VALUE: a <- %EAX
; ASM-DAG: #DEBUG_VALUE: f:p <- %ESI
@@ -65,7 +65,7 @@
; ASM: .cv_def_range [[after_getint]] [[after_inc_eax]], "A\021\021\000\000\000"
; ASM: .short 4414 # Record kind: S_LOCAL
; ASM: .asciz "c"
-; ASM: .cv_def_range [[after_getint]] [[after_inc_eax]], "A\021\021\000\000\000"
+; ASM: .cv_def_range [[after_getint]] [[after_je]], "A\021\021\000\000\000"
; ASM: .short 4414 # Record kind: S_LOCAL
; ASM: .asciz "b"
; ASM: .cv_def_range [[after_inc_eax]] [[after_if]], "A\021\021\000\000\000"
@@ -132,7 +132,7 @@
; OBJ: LocalVariableAddrRange {
; OBJ: OffsetStart: .text+0xC
; OBJ: ISectStart: 0x0
-; OBJ: Range: 0x6
+; OBJ: Range: 0x4
; OBJ: }
; OBJ: }
; OBJ: Local {
@@ -143,7 +143,7 @@
; OBJ: }
; OBJ: DefRangeRegister {
; OBJ: Register: 17
-; OBJ: LocalVariableAddrRange {
+; OBJ: MayHaveNoName: 0
; OBJ: OffsetStart: .text+0x12
; OBJ: ISectStart: 0x0
; OBJ: Range: 0x6
diff --git a/test/DebugInfo/MIR/X86/livedebugvalues-limit.mir b/test/DebugInfo/MIR/X86/livedebugvalues-limit.mir
new file mode 100644
index 000000000000..4c87543636d5
--- /dev/null
+++ b/test/DebugInfo/MIR/X86/livedebugvalues-limit.mir
@@ -0,0 +1,228 @@
+--- |
+ ; RUN: llc -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck %s
+ ; Created from:
+ ; void sink(int a);
+ ; void __attribute((always_inline)) f(int a) { sink(a); }
+ ; void foo(int i) {
+ ; f(i);
+ ; if (i)
+ ; f(i);
+ ; f(i);
+ ; }
+ ;
+ ; This test verifies that LiveDebugValues doesn't propagate DBG_VALUEs into
+ ; basic blocks that are beyond the scope of the source variable.
+ ;
+ ; CHECK: bb.1.if.then:
+ ; CHECK: DBG_VALUE debug-use %ebx, debug-use _, !19, !13, debug-location !20
+ ; CHECK-NOT: DBG_VALUE debug-use %ebx, debug-use _, !12, !13, debug-location !21
+ ; CHECK: DBG_VALUE debug-use %ebx, debug-use _, !12, !13, debug-location !27
+ ; CHECK: bb.2.if.end:
+ ; CHECK: DBG_VALUE debug-use %ebx, debug-use _, !19, !13, debug-location !20
+ ; CHECK-NOT: DBG_VALUE debug-use %ebx, debug-use _, !12, !13, debug-location !21
+ ; CHECK: DBG_VALUE debug-use %ebx, debug-use _, !12, !13, debug-location !31
+ ;
+ ; ModuleID = 'livedebugvalues-limit.ll'
+ source_filename = "livedebugvalues-limit.c"
+ target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+ target triple = "x86_64-apple-macosx"
+
+ ; Function Attrs: alwaysinline nounwind ssp uwtable
+ define void @f(i32 %a) local_unnamed_addr #0 !dbg !7 {
+ entry:
+ tail call void @llvm.dbg.value(metadata i32 %a, i64 0, metadata !12, metadata !13), !dbg !14
+ tail call void @sink(i32 %a) #4, !dbg !15
+ ret void, !dbg !16
+ }
+
+ declare void @sink(i32) local_unnamed_addr
+
+ ; Function Attrs: nounwind ssp uwtable
+ define void @foo(i32 %i) local_unnamed_addr #2 !dbg !17 {
+ entry:
+ tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !19, metadata !13), !dbg !20
+ tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !12, metadata !13) #4, !dbg !21
+ tail call void @sink(i32 %i) #4, !dbg !23
+ %tobool = icmp eq i32 %i, 0, !dbg !24
+ br i1 %tobool, label %if.end, label %if.then, !dbg !26
+
+ if.then: ; preds = %entry
+ tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !12, metadata !13) #4, !dbg !27
+ tail call void @sink(i32 %i) #4, !dbg !29
+ br label %if.end, !dbg !30
+
+ if.end: ; preds = %if.then, %entry
+ tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !12, metadata !13) #4, !dbg !31
+ tail call void @sink(i32 %i) #4, !dbg !33
+ ret void, !dbg !34
+ }
+
+ ; Function Attrs: nounwind readnone
+ declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3
+
+ ; Function Attrs: nounwind
+ declare void @llvm.stackprotector(i8*, i8**) #4
+
+ attributes #0 = { alwaysinline nounwind ssp uwtable }
+ attributes #2 = { nounwind ssp uwtable }
+ attributes #3 = { nounwind readnone }
+ attributes #4 = { nounwind }
+
+ !llvm.dbg.cu = !{!0}
+ !llvm.module.flags = !{!3, !4, !5}
+ !llvm.ident = !{!6}
+
+ !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 4.0.0 (trunk 281923) (llvm/trunk 281916)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
+ !1 = !DIFile(filename: "livedebugvalues-limit.c", directory: "/Volumes/Fusion/Data/llvm")
+ !2 = !{}
+ !3 = !{i32 2, !"Dwarf Version", i32 4}
+ !4 = !{i32 2, !"Debug Info Version", i32 3}
+ !5 = !{i32 1, !"PIC Level", i32 2}
+ !6 = !{!"clang version 4.0.0 (trunk 281923) (llvm/trunk 281916)"}
+ !7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 3, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !11)
+ !8 = !DISubroutineType(types: !9)
+ !9 = !{null, !10}
+ !10 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+ !11 = !{!12}
+ !12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 3, type: !10)
+ !13 = !DIExpression()
+ !14 = !DILocation(line: 3, column: 41, scope: !7)
+ !15 = !DILocation(line: 3, column: 46, scope: !7)
+ !16 = !DILocation(line: 3, column: 55, scope: !7)
+ !17 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 4, type: !8, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !18)
+ !18 = !{!19}
+ !19 = !DILocalVariable(name: "i", arg: 1, scope: !17, file: !1, line: 4, type: !10)
+ !20 = !DILocation(line: 4, column: 14, scope: !17)
+ !21 = !DILocation(line: 3, column: 41, scope: !7, inlinedAt: !22)
+ !22 = distinct !DILocation(line: 5, column: 3, scope: !17)
+ !23 = !DILocation(line: 3, column: 46, scope: !7, inlinedAt: !22)
+ !24 = !DILocation(line: 6, column: 7, scope: !25)
+ !25 = distinct !DILexicalBlock(scope: !17, file: !1, line: 6, column: 7)
+ !26 = !DILocation(line: 6, column: 7, scope: !17)
+ !27 = !DILocation(line: 3, column: 41, scope: !7, inlinedAt: !28)
+ !28 = distinct !DILocation(line: 7, column: 5, scope: !25)
+ !29 = !DILocation(line: 3, column: 46, scope: !7, inlinedAt: !28)
+ !30 = !DILocation(line: 7, column: 5, scope: !25)
+ !31 = !DILocation(line: 3, column: 41, scope: !7, inlinedAt: !32)
+ !32 = distinct !DILocation(line: 8, column: 3, scope: !17)
+ !33 = !DILocation(line: 3, column: 46, scope: !7, inlinedAt: !32)
+ !34 = !DILocation(line: 9, column: 1, scope: !17)
+
+...
+---
+name: f
+alignment: 4
+exposesReturnsTwice: false
+legalized: false
+regBankSelected: false
+selected: false
+tracksRegLiveness: true
+liveins:
+ - { reg: '%edi' }
+calleeSavedRegisters: [ '%bh', '%bl', '%bp', '%bpl', '%bx', '%ebp', '%ebx',
+ '%rbp', '%rbx', '%r12', '%r13', '%r14', '%r15',
+ '%r12b', '%r13b', '%r14b', '%r15b', '%r12d', '%r13d',
+ '%r14d', '%r15d', '%r12w', '%r13w', '%r14w', '%r15w' ]
+frameInfo:
+ isFrameAddressTaken: false
+ isReturnAddressTaken: false
+ hasStackMap: false
+ hasPatchPoint: false
+ stackSize: 8
+ offsetAdjustment: 0
+ maxAlignment: 0
+ adjustsStack: false
+ hasCalls: false
+ maxCallFrameSize: 0
+ hasOpaqueSPAdjustment: false
+ hasVAStart: false
+ hasMustTailInVarArgFunc: false
+fixedStack:
+ - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16 }
+body: |
+ bb.0.entry:
+ liveins: %edi, %rbp
+
+ frame-setup PUSH64r killed %rbp, implicit-def %rsp, implicit %rsp
+ CFI_INSTRUCTION def_cfa_offset 16
+ CFI_INSTRUCTION offset %rbp, -16
+ %rbp = frame-setup MOV64rr %rsp
+ CFI_INSTRUCTION def_cfa_register %rbp
+ DBG_VALUE debug-use %edi, debug-use _, !12, !13, debug-location !14
+ %rbp = POP64r implicit-def %rsp, implicit %rsp, debug-location !15
+ TAILJMPd64 @sink, csr_64, implicit %rsp, implicit %rsp, implicit %edi, debug-location !15
+
+...
+---
+name: foo
+alignment: 4
+exposesReturnsTwice: false
+legalized: false
+regBankSelected: false
+selected: false
+tracksRegLiveness: true
+liveins:
+ - { reg: '%edi' }
+calleeSavedRegisters: [ '%bh', '%bl', '%bp', '%bpl', '%bx', '%ebp', '%ebx',
+ '%rbp', '%rbx', '%r12', '%r13', '%r14', '%r15',
+ '%r12b', '%r13b', '%r14b', '%r15b', '%r12d', '%r13d',
+ '%r14d', '%r15d', '%r12w', '%r13w', '%r14w', '%r15w' ]
+frameInfo:
+ isFrameAddressTaken: false
+ isReturnAddressTaken: false
+ hasStackMap: false
+ hasPatchPoint: false
+ stackSize: 24
+ offsetAdjustment: -8
+ maxAlignment: 0
+ adjustsStack: true
+ hasCalls: true
+ maxCallFrameSize: 0
+ hasOpaqueSPAdjustment: false
+ hasVAStart: false
+ hasMustTailInVarArgFunc: false
+fixedStack:
+ - { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, callee-saved-register: '%rbx' }
+ - { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16 }
+body: |
+ bb.0.entry:
+ successors: %bb.2.if.end, %bb.1.if.then
+ liveins: %edi, %rbx, %rbp
+
+ frame-setup PUSH64r killed %rbp, implicit-def %rsp, implicit %rsp
+ CFI_INSTRUCTION def_cfa_offset 16
+ CFI_INSTRUCTION offset %rbp, -16
+ %rbp = frame-setup MOV64rr %rsp
+ CFI_INSTRUCTION def_cfa_register %rbp
+ frame-setup PUSH64r killed %rbx, implicit-def %rsp, implicit %rsp
+ frame-setup PUSH64r undef %rax, implicit-def %rsp, implicit %rsp
+ CFI_INSTRUCTION offset %rbx, -24
+ DBG_VALUE debug-use %edi, debug-use _, !19, !13, debug-location !20
+ %ebx = MOV32rr %edi
+ DBG_VALUE debug-use %ebx, debug-use _, !12, !13, debug-location !21
+ DBG_VALUE debug-use %ebx, debug-use _, !19, !13, debug-location !20
+ CALL64pcrel32 @sink, csr_64, implicit %rsp, implicit %edi, implicit-def %rsp, debug-location !23
+ TEST32rr %ebx, %ebx, implicit-def %eflags, debug-location !24
+ JE_1 %bb.2.if.end, implicit %eflags
+
+ bb.1.if.then:
+ successors: %bb.2.if.end
+ liveins: %ebx, %rbp
+
+ DBG_VALUE debug-use %ebx, debug-use _, !19, !13, debug-location !20
+ DBG_VALUE debug-use %ebx, debug-use _, !12, !13, debug-location !27
+ %edi = MOV32rr %ebx, debug-location !29
+ CALL64pcrel32 @sink, csr_64, implicit %rsp, implicit %edi, implicit-def %rsp, debug-location !29
+
+ bb.2.if.end:
+ liveins: %ebx, %rbp
+
+ DBG_VALUE debug-use %ebx, debug-use _, !19, !13, debug-location !20
+ %edi = MOV32rr killed %ebx, debug-location !33
+ %rsp = ADD64ri8 %rsp, 8, implicit-def dead %eflags, debug-location !33
+ DBG_VALUE debug-use %ebx, debug-use _, !12, !13, debug-location !31
+ %rbx = POP64r implicit-def %rsp, implicit %rsp, debug-location !33
+ %rbp = POP64r implicit-def %rsp, implicit %rsp, debug-location !33
+ TAILJMPd64 @sink, csr_64, implicit %rsp, implicit %rsp, implicit %edi, debug-location !33
+
+...
diff --git a/test/DebugInfo/X86/fission-ranges.ll b/test/DebugInfo/X86/fission-ranges.ll
index 3c05f223ee79..0dfb13ab66b7 100644
--- a/test/DebugInfo/X86/fission-ranges.ll
+++ b/test/DebugInfo/X86/fission-ranges.ll
@@ -32,13 +32,13 @@
; CHECK-NEXT: Length: 25
; CHECK-NEXT: Location description: 50 93 04
; CHECK: [[E]]: Beginning address index: 4
-; CHECK-NEXT: Length: 23
+; CHECK-NEXT: Length: 19
; CHECK-NEXT: Location description: 50 93 04
; CHECK: [[B]]: Beginning address index: 5
-; CHECK-NEXT: Length: 21
+; CHECK-NEXT: Length: 17
; CHECK-NEXT: Location description: 50 93 04
; CHECK: [[D]]: Beginning address index: 6
-; CHECK-NEXT: Length: 21
+; CHECK-NEXT: Length: 17
; CHECK-NEXT: Location description: 50 93 04
; Make sure we don't produce any relocations in any .dwo section (though in particular, debug_info.dwo)
--
2.7.4

103
rust-lang-llvm-pr54.patch Normal file
View file

@ -0,0 +1,103 @@
From 9b74379db3f9e30516f053138fd3697d42b23164 Mon Sep 17 00:00:00 2001
From: David Majnemer <david.majnemer@gmail.com>
Date: Fri, 7 Oct 2016 01:38:35 +0000
Subject: [rust-lang/llvm#54] [SimplifyCFG] Correctly test for unconditional
branches in GetCaseResults
GetCaseResults assumed that a terminator with one successor was an
unconditional branch. This is not necessarily the case, it could be a
cleanupret.
Strengthen the check by querying whether or not the terminator is
exceptional.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283517 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/Transforms/Utils/SimplifyCFG.cpp | 2 +-
.../SimplifyCFG/X86/switch_to_lookup_table.ll | 60 ++++++++++++++++++++++
2 files changed, 61 insertions(+), 1 deletion(-)
diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp
index c197317ac771..d274f97296dc 100644
--- a/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -4228,7 +4228,7 @@ GetCaseResults(SwitchInst *SI, ConstantInt *CaseVal, BasicBlock *CaseDest,
++I) {
if (TerminatorInst *T = dyn_cast<TerminatorInst>(I)) {
// If the terminator is a simple branch, continue to the next block.
- if (T->getNumSuccessors() != 1)
+ if (T->getNumSuccessors() != 1 || T->isExceptional())
return false;
Pred = CaseDest;
CaseDest = T->getSuccessor(0);
diff --git a/test/Transforms/SimplifyCFG/X86/switch_to_lookup_table.ll b/test/Transforms/SimplifyCFG/X86/switch_to_lookup_table.ll
index bae8c1dc5a4b..77e355a00528 100644
--- a/test/Transforms/SimplifyCFG/X86/switch_to_lookup_table.ll
+++ b/test/Transforms/SimplifyCFG/X86/switch_to_lookup_table.ll
@@ -1334,3 +1334,63 @@ cleanup4:
br label %while.body
}
+declare void @throw(i1)
+
+define void @wineh_test(i64 %val) personality i32 (...)* @__CxxFrameHandler3 {
+entry:
+ invoke void @throw(i1 false)
+ to label %unreachable unwind label %cleanup1
+
+unreachable:
+ unreachable
+
+cleanup1:
+ %cleanuppad1 = cleanuppad within none []
+ switch i64 %val, label %cleanupdone2 [
+ i64 0, label %cleanupdone1
+ i64 1, label %cleanupdone1
+ i64 6, label %cleanupdone1
+ ]
+
+cleanupdone1:
+ cleanupret from %cleanuppad1 unwind label %cleanup2
+
+cleanupdone2:
+ cleanupret from %cleanuppad1 unwind label %cleanup2
+
+cleanup2:
+ %phi = phi i1 [ true, %cleanupdone1 ], [ false, %cleanupdone2 ]
+ %cleanuppad2 = cleanuppad within none []
+ call void @throw(i1 %phi) [ "funclet"(token %cleanuppad2) ]
+ unreachable
+}
+
+; CHECK-LABEL: @wineh_test(
+; CHECK: entry:
+; CHECK: invoke void @throw(i1 false)
+; CHECK: to label %[[unreachable:.*]] unwind label %[[cleanup1:.*]]
+
+; CHECK: [[unreachable]]:
+; CHECK: unreachable
+
+; CHECK: [[cleanup1]]:
+; CHECK: %[[cleanuppad1:.*]] = cleanuppad within none []
+; CHECK: switch i64 %val, label %[[cleanupdone2:.*]] [
+; CHECK: i64 0, label %[[cleanupdone1:.*]]
+; CHECK: i64 1, label %[[cleanupdone1]]
+; CHECK: i64 6, label %[[cleanupdone1]]
+; CHECK: ]
+
+; CHECK: [[cleanupdone1]]:
+; CHECK: cleanupret from %[[cleanuppad1]] unwind label %[[cleanup2:.*]]
+
+; CHECK: [[cleanupdone2]]:
+; CHECK: cleanupret from %[[cleanuppad1]] unwind label %[[cleanup2]]
+
+; CHECK: [[cleanup2]]:
+; CHECK: %[[phi:.*]] = phi i1 [ true, %[[cleanupdone1]] ], [ false, %[[cleanupdone2]] ]
+; CHECK: %[[cleanuppad2:.*]] = cleanuppad within none []
+; CHECK: call void @throw(i1 %[[phi]]) [ "funclet"(token %[[cleanuppad2]]) ]
+; CHECK: unreachable
+
+declare i32 @__CxxFrameHandler3(...)
--
2.7.4