diff options
| -rw-r--r-- | lib/CodeGen/RegisterScavenging.cpp | 2 | ||||
| -rw-r--r-- | test/CodeGen/PowerPC/rs-undef-use.ll | 48 |
2 files changed, 49 insertions, 1 deletions
diff --git a/lib/CodeGen/RegisterScavenging.cpp b/lib/CodeGen/RegisterScavenging.cpp index d1a945d..75ebdaa 100644 --- a/lib/CodeGen/RegisterScavenging.cpp +++ b/lib/CodeGen/RegisterScavenging.cpp @@ -368,7 +368,7 @@ unsigned RegScavenger::scavengeRegister(const TargetRegisterClass *RC, // Exclude all the registers being used by the instruction. for (unsigned i = 0, e = I->getNumOperands(); i != e; ++i) { MachineOperand &MO = I->getOperand(i); - if (MO.isReg() && MO.getReg() != 0 && + if (MO.isReg() && MO.getReg() != 0 && !(MO.isUse() && MO.isUndef()) && !TargetRegisterInfo::isVirtualRegister(MO.getReg())) Candidates.reset(MO.getReg()); } diff --git a/test/CodeGen/PowerPC/rs-undef-use.ll b/test/CodeGen/PowerPC/rs-undef-use.ll new file mode 100644 index 0000000..24dd5fd --- /dev/null +++ b/test/CodeGen/PowerPC/rs-undef-use.ll @@ -0,0 +1,48 @@ +; RUN: llc -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 < %s +target triple = "powerpc64-unknown-linux-gnu" + +define void @autogen_SD156869(i8*, i64*) { +BB: + %A3 = alloca <2 x i1> + %A2 = alloca <8 x i32> + br label %CF + +CF: ; preds = %CF85, %CF, %BB + br i1 undef, label %CF, label %CF82.critedge + +CF82.critedge: ; preds = %CF + store i8 -59, i8* %0 + br label %CF82 + +CF82: ; preds = %CF82, %CF82.critedge + %L17 = load i8* %0 + %E18 = extractelement <2 x i64> undef, i32 0 + %PC = bitcast <2 x i1>* %A3 to i64* + br i1 undef, label %CF82, label %CF84.critedge + +CF84.critedge: ; preds = %CF82 + store i64 455385, i64* %PC + br label %CF84 + +CF84: ; preds = %CF84, %CF84.critedge + %L40 = load i64* %PC + store i64 -1, i64* %PC + %Sl46 = select i1 undef, i1 undef, i1 false + br i1 %Sl46, label %CF84, label %CF85 + +CF85: ; preds = %CF84 + %L47 = load i64* %PC + store i64 %E18, i64* %PC + %PC52 = bitcast <8 x i32>* %A2 to ppc_fp128* + store ppc_fp128 0xM4D436562A0416DE00000000000000000, ppc_fp128* %PC52 + %PC59 = bitcast i64* %1 to i8* + %Cmp61 = icmp slt i64 %L47, %L40 + br i1 %Cmp61, label %CF, label %CF77 + +CF77: ; preds = %CF77, %CF85 + br i1 undef, label %CF77, label %CF81 + +CF81: ; preds = %CF77 + store i8 %L17, i8* %PC59 + ret void +} |