diff options
| author | Bill Wendling <isanbard@gmail.com> | 2011-01-06 00:50:34 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2011-01-06 00:50:34 +0000 |
| commit | a99ec28134c2fd0a21c446a58bf6406b8aa1a580 (patch) | |
| tree | 1c592c4c9e343b7a9efffd231b378233a3a6e72c | |
| parent | 78d15761e40a542b992ac811b4e3909c33d1513a (diff) | |
PR8919 - LLVM incorrectly generates "_alloca" as the stack probing call. That
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
| -rw-r--r-- | lib/Target/X86/X86FrameInfo.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Target/X86/X86FrameInfo.cpp b/lib/Target/X86/X86FrameInfo.cpp index afadb4c9b3..5a8d9768f8 100644 --- a/lib/Target/X86/X86FrameInfo.cpp +++ b/lib/Target/X86/X86FrameInfo.cpp @@ -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) |