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The x86 jit doesn't generate a def_cfa_offset unwind instruction after the

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pushes in the function prolog if the function doesn't have any stack space,
i.e. for a prolog like:

0x40011870:     push %r15
0x40011872:     push %r14
0x40011874:     push %rbx

Patch by Zoltan!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77919 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2009-08-02 22:25:37 +00:00
parent 3be03406c9
commit 3bb9b9a1ab
1 changed files with 1 additions and 1 deletions
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2
lib/Target/X86/X86RegisterInfo.cpp
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@ -1059,7 +1059,7 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const {
emitSPUpdate(MBB, MBBI, StackPtr, -(int64_t)NumBytes, Is64Bit, TII);
}
if (!HasFP && needsFrameMoves && NumBytes) {
if (!HasFP && needsFrameMoves) {
// Mark end of stack pointer adjustment.
unsigned LabelId = MMI->NextLabelID();
BuildMI(MBB, MBBI, DL, TII.get(X86::DBG_LABEL)).addImm(LabelId);