diff options
| -rw-r--r-- | lib/CodeGen/MachineInstr.cpp | 8 | ||||
| -rw-r--r-- | test/CodeGen/X86/2009-07-19-AsmExtraOperands.ll | 11 |
2 files changed, 17 insertions, 2 deletions
diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp index c6f3e31..8deaa1a 100644 --- a/lib/CodeGen/MachineInstr.cpp +++ b/lib/CodeGen/MachineInstr.cpp @@ -732,7 +732,9 @@ isRegTiedToUseOperand(unsigned DefOpIdx, unsigned *UseOpIdx) const { unsigned DefPart = 0; for (unsigned i = 1, e = getNumOperands(); i < e; ) { const MachineOperand &FMO = getOperand(i); - assert(FMO.isImm()); + // After the normal asm operands there may be additional imp-def regs. + if (!FMO.isImm()) + return false; // Skip over this def. unsigned NumOps = InlineAsm::getNumOperandRegisters(FMO.getImm()); unsigned PrevDef = i + 1; @@ -788,7 +790,9 @@ isRegTiedToDefOperand(unsigned UseOpIdx, unsigned *DefOpIdx) const { unsigned FlagIdx, NumOps=0; for (FlagIdx = 1; FlagIdx < UseOpIdx; FlagIdx += NumOps+1) { const MachineOperand &UFMO = getOperand(FlagIdx); - assert(UFMO.isImm() && "Expecting flag operand on inline asm"); + // After the normal asm operands there may be additional imp-def regs. + if (!UFMO.isImm()) + return false; NumOps = InlineAsm::getNumOperandRegisters(UFMO.getImm()); assert(NumOps < getNumOperands() && "Invalid inline asm flag"); if (UseOpIdx < FlagIdx+NumOps+1) diff --git a/test/CodeGen/X86/2009-07-19-AsmExtraOperands.ll b/test/CodeGen/X86/2009-07-19-AsmExtraOperands.ll new file mode 100644 index 0000000..31322cf --- /dev/null +++ b/test/CodeGen/X86/2009-07-19-AsmExtraOperands.ll @@ -0,0 +1,11 @@ +; RUN: llvm-as < %s | llc -march=x86-64 +; PR4583 + +define i32 @atomic_cmpset_long(i64* %dst, i64 %exp, i64 %src) nounwind ssp noredzone noimplicitfloat { +entry: + %0 = call i8 asm sideeffect "\09lock ; \09\09\09cmpxchgq $2,$1 ;\09 sete\09$0 ;\09\091:\09\09\09\09# atomic_cmpset_long", "={ax},=*m,r,{ax},*m,~{memory},~{dirflag},~{fpsr},~{flags}"(i64* undef, i64 undef, i64 undef, i64* undef) nounwind ; <i8> [#uses=0] + br label %1 + +; <label>:1 ; preds = %entry + ret i32 undef +} |