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PR8919 - LLVM incorrectly generates "_alloca" as the stack probing call. That

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works only on MinGW32. On 64-bit, the function to call is "__chkstk".
Patch by KS Sreeram!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122934 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2011-01-06 00:50:34 +00:00
parent 78d15761e4
commit a99ec28134
1 changed files with 2 additions and 0 deletions
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2
lib/Target/X86/X86FrameInfo.cpp
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@ -566,6 +566,8 @@ void X86FrameInfo::emitPrologue(MachineFunction &MF) const {
const char *StackProbeSymbol =
STI.isTargetWindows() ? "_chkstk" : "_alloca";
if (Is64Bit && STI.isTargetCygMing())
StackProbeSymbol = "__chkstk";
unsigned CallOp = Is64Bit ? X86::CALL64pcrel32 : X86::CALLpcrel32;
if (!isEAXAlive) {
BuildMI(MBB, MBBI, DL, TII.get(X86::MOV32ri), X86::EAX)