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
diff --git a/lib/Target/X86/X86FrameInfo.cpp b/lib/Target/X86/X86FrameInfo.cpp
index afadb4c..5a8d976 100644
--- a/lib/Target/X86/X86FrameInfo.cpp
+++ b/lib/Target/X86/X86FrameInfo.cpp
@@ -566,6 +566,8 @@
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)