diff options
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 76eeb64650..06929dd188 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -15226,9 +15226,15 @@ X86TargetLowering::EmitVAStartSaveXMMRegsWithCustomInserter( MBB->addSuccessor(EndMBB); } + // Make sure the last operand is EFLAGS, which gets clobbered by the branch + // that was just emitted, but clearly shouldn't be "saved". + assert((MI->getNumOperands() <= 3 || + !MI->getOperand(MI->getNumOperands() - 1).isReg() || + MI->getOperand(MI->getNumOperands() - 1).getReg() == X86::EFLAGS) + && "Expected last argument to be EFLAGS"); unsigned MOVOpc = Subtarget->hasFp256() ? X86::VMOVAPSmr : X86::MOVAPSmr; // In the XMM save block, save all the XMM argument registers. - for (int i = 3, e = MI->getNumOperands(); i != e; ++i) { + for (int i = 3, e = MI->getNumOperands() - 1; i != e; ++i) { int64_t Offset = (i - 3) * 16 + VarArgsFPOffset; MachineMemOperand *MMO = F->getMachineMemOperand( |