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Fix PR8201: Update the code to call via X86::CALL64pcrel32 in the 64-bit case. 

llvm-svn: 114597
This commit is contained in:
Cameron Esfahani 2010-09-22 22:35:21 +00:00
parent e9e9c08ce2
commit bbb9287080
2 changed files with 5 additions and 4 deletions
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5
llvm/lib/Target/X86/X86RegisterInfo.cpp
View File

@ -1086,10 +1086,11 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const {
const char *StackProbeSymbol =
Subtarget->isTargetWindows() ? "_chkstk" : "_alloca";
unsigned CallOp = Is64Bit ? X86::CALL64pcrel32 : X86::CALLpcrel32;
if (!isEAXAlive) {
BuildMI(MBB, MBBI, DL, TII.get(X86::MOV32ri), X86::EAX)
.addImm(NumBytes);
BuildMI(MBB, MBBI, DL, TII.get(X86::CALLpcrel32))
BuildMI(MBB, MBBI, DL, TII.get(CallOp))
.addExternalSymbol(StackProbeSymbol)
.addReg(StackPtr, RegState::Define | RegState::Implicit)
.addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
@ -1102,7 +1103,7 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const {
// allocated bytes for EAX.
BuildMI(MBB, MBBI, DL, TII.get(X86::MOV32ri), X86::EAX)
.addImm(NumBytes - 4);
BuildMI(MBB, MBBI, DL, TII.get(X86::CALLpcrel32))
BuildMI(MBB, MBBI, DL, TII.get(CallOp))
.addExternalSymbol(StackProbeSymbol)
.addReg(StackPtr, RegState::Define | RegState::Implicit)
.addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);

4
llvm/test/CodeGen/X86/win_chkstk.ll
View File

@ -15,7 +15,7 @@ entry:
; WIN_X32: calll __chkstk
; WIN_X64: call __chkstk
; MINGW_X32: calll __alloca
; MINGW_X64: calll _alloca
; MINGW_X64: callq _alloca
; LINUX-NOT: call __chkstk
%array4096 = alloca [4096 x i8], align 16 ; <[4096 x i8]*> [#uses=0]
ret i32 0
@ -34,7 +34,7 @@ entry:
; WIN_X64: ret
; MINGW_X64: # BB#0:
; MINGW_X64-NOT: call _alloca
; MINGW_X64-NOT: callq _alloca
; MINGW_X64: ret
; LINUX: # BB#0: