Fix nasty mingw32 bug, which e.g. prevented llvm-gcc bootstrap there.

[oota-llvm.git] / lib / Target / X86 / X86RegisterInfo.cpp

diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp
index 746e3fa7b5ce8c10594a2ee11df8574cfa59e45b..56ddfb03ecb0085399d1f697ea36b55275bd37ca 100644 (file)
--- a/lib/Target/X86/X86RegisterInfo.cpp
+++ b/lib/Target/X86/X86RegisterInfo.cpp
@@ -1109,7 +1109,8 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const {
         .addImm(NumBytes);
       BuildMI(MBB, MBBI, DL, TII.get(X86::CALLpcrel32))
         .addExternalSymbol("_alloca")
-        .addReg(StackPtr, RegState::Define | RegState::Implicit);
+        .addReg(StackPtr,    RegState::Define | RegState::Implicit)
+        .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
     } else {
       // Save EAX
       BuildMI(MBB, MBBI, DL, TII.get(X86::PUSH32r))
@@ -1121,7 +1122,8 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const {
         .addImm(NumBytes - 4);
       BuildMI(MBB, MBBI, DL, TII.get(X86::CALLpcrel32))
         .addExternalSymbol("_alloca")
-        .addReg(StackPtr, RegState::Define | RegState::Implicit);
+        .addReg(StackPtr,    RegState::Define | RegState::Implicit)
+        .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
 
       // Restore EAX
       MachineInstr *MI = addRegOffset(BuildMI(MF, DL, TII.get(X86::MOV32rm),