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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
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@ -566,6 +566,8 @@ void X86FrameInfo::emitPrologue(MachineFunction &MF) const {
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const char *StackProbeSymbol =
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STI.isTargetWindows() ? "_chkstk" : "_alloca";
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if (Is64Bit && STI.isTargetCygMing())
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StackProbeSymbol = "__chkstk";
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unsigned CallOp = Is64Bit ? X86::CALL64pcrel32 : X86::CALLpcrel32;
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if (!isEAXAlive) {
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BuildMI(MBB, MBBI, DL, TII.get(X86::MOV32ri), X86::EAX)
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