mirror of
https://src.fedoraproject.org/rpms/llvm.git
synced 2024-11-24 17:34:47 +00:00
74 lines
2.3 KiB
Diff
74 lines
2.3 KiB
Diff
From 9d1f05a7b8537deb5f626cd1b7b26ef2678f4c8e Mon Sep 17 00:00:00 2001
|
|
From: Arthur Eubanks <aeubanks@google.com>
|
|
Date: Thu, 27 Jul 2023 13:27:58 -0700
|
|
Subject: [PATCH] [PEI] Don't zero out noreg operands
|
|
|
|
A tail call may have $noreg operands.
|
|
|
|
Fixes a crash.
|
|
|
|
Reviewed By: xgupta
|
|
|
|
Differential Revision: https://reviews.llvm.org/D156485
|
|
|
|
(cherry picked from commit f800c1f3b207e7bcdc8b4c7192928d9a078242a0)
|
|
---
|
|
llvm/lib/CodeGen/PrologEpilogInserter.cpp | 9 +++++++--
|
|
llvm/test/CodeGen/X86/zero-call-used-regs.ll | 14 ++++++++++++++
|
|
2 files changed, 21 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/llvm/lib/CodeGen/PrologEpilogInserter.cpp b/llvm/lib/CodeGen/PrologEpilogInserter.cpp
|
|
index e323aaaeefaf..49047719fdaa 100644
|
|
--- a/llvm/lib/CodeGen/PrologEpilogInserter.cpp
|
|
+++ b/llvm/lib/CodeGen/PrologEpilogInserter.cpp
|
|
@@ -1285,6 +1285,8 @@ void PEI::insertZeroCallUsedRegs(MachineFunction &MF) {
|
|
continue;
|
|
|
|
MCRegister Reg = MO.getReg();
|
|
+ if (!Reg)
|
|
+ continue;
|
|
|
|
// This picks up sibling registers (e.q. %al -> %ah).
|
|
for (MCRegUnit Unit : TRI.regunits(Reg))
|
|
@@ -1308,8 +1310,11 @@ void PEI::insertZeroCallUsedRegs(MachineFunction &MF) {
|
|
if (!MO.isReg())
|
|
continue;
|
|
|
|
- for (const MCPhysReg &Reg :
|
|
- TRI.sub_and_superregs_inclusive(MO.getReg()))
|
|
+ MCRegister Reg = MO.getReg();
|
|
+ if (!Reg)
|
|
+ continue;
|
|
+
|
|
+ for (const MCPhysReg Reg : TRI.sub_and_superregs_inclusive(Reg))
|
|
RegsToZero.reset(Reg);
|
|
}
|
|
}
|
|
diff --git a/llvm/test/CodeGen/X86/zero-call-used-regs.ll b/llvm/test/CodeGen/X86/zero-call-used-regs.ll
|
|
index 63d51c916bb9..97ad5ce9c8cb 100644
|
|
--- a/llvm/test/CodeGen/X86/zero-call-used-regs.ll
|
|
+++ b/llvm/test/CodeGen/X86/zero-call-used-regs.ll
|
|
@@ -241,6 +241,20 @@ entry:
|
|
ret i32 %x
|
|
}
|
|
|
|
+define dso_local void @tailcall(ptr %p) local_unnamed_addr #0 "zero-call-used-regs"="used-gpr" {
|
|
+; I386-LABEL: tailcall:
|
|
+; I386: # %bb.0:
|
|
+; I386-NEXT: movl {{[0-9]+}}(%esp), %eax
|
|
+; I386-NEXT: jmpl *(%eax) # TAILCALL
|
|
+;
|
|
+; X86-64-LABEL: tailcall:
|
|
+; X86-64: # %bb.0:
|
|
+; X86-64-NEXT: jmpq *(%rdi) # TAILCALL
|
|
+ %c = load ptr, ptr %p
|
|
+ tail call void %c()
|
|
+ ret void
|
|
+}
|
|
+
|
|
; Don't emit zeroing registers in "main" function.
|
|
define dso_local i32 @main() local_unnamed_addr #1 {
|
|
; I386-LABEL: main:
|
|
--
|
|
2.43.0
|
|
|