diff options
| -rw-r--r-- | lib/Target/PowerPC/PPCCTRLoops.cpp | 8 | ||||
| -rw-r--r-- | test/CodeGen/PowerPC/ctrloop-sh.ll | 72 |
2 files changed, 80 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/PPCCTRLoops.cpp b/lib/Target/PowerPC/PPCCTRLoops.cpp index e419b9b40d..819635c5d8 100644 --- a/lib/Target/PowerPC/PPCCTRLoops.cpp +++ b/lib/Target/PowerPC/PPCCTRLoops.cpp @@ -369,6 +369,14 @@ bool PPCCTRLoops::mightUseCTR(const Triple &TT, BasicBlock *BB) { J->getOpcode() == Instruction::URem || J->getOpcode() == Instruction::SRem)) { return true; + } else if (TT.isArch32Bit() && + isLargeIntegerTy(false, J->getType()->getScalarType()) && + (J->getOpcode() == Instruction::Shl || + J->getOpcode() == Instruction::AShr || + J->getOpcode() == Instruction::LShr)) { + // Only on PPC32, for 128-bit integers (specifically not 64-bit + // integers), these might be runtime calls. + return true; } else if (isa<IndirectBrInst>(J) || isa<InvokeInst>(J)) { // On PowerPC, indirect jumps use the counter register. return true; diff --git a/test/CodeGen/PowerPC/ctrloop-sh.ll b/test/CodeGen/PowerPC/ctrloop-sh.ll new file mode 100644 index 0000000000..d8e6fc79a6 --- /dev/null +++ b/test/CodeGen/PowerPC/ctrloop-sh.ll @@ -0,0 +1,72 @@ +; RUN: llc < %s | FileCheck %s +target datalayout = "E-m:e-p:32:32-i128:64-n32" +target triple = "powerpc-ellcc-linux" + +; Function Attrs: nounwind +define void @foo1(i128* %a, i128* readonly %b, i128* readonly %c) #0 { +entry: + br label %for.body + +for.body: ; preds = %for.body, %entry + %i.02 = phi i32 [ 0, %entry ], [ %inc, %for.body ] + %0 = load i128* %b, align 16 + %1 = load i128* %c, align 16 + %shl = shl i128 %0, %1 + store i128 %shl, i128* %a, align 16 + %inc = add nsw i32 %i.02, 1 + %exitcond = icmp eq i32 %inc, 2048 + br i1 %exitcond, label %for.end, label %for.body + +for.end: ; preds = %for.body + ret void + +; CHECK-LABEL: @foo1 +; CHECK-NOT: mtctr +} + +; Function Attrs: nounwind +define void @foo2(i128* %a, i128* readonly %b, i128* readonly %c) #0 { +entry: + br label %for.body + +for.body: ; preds = %for.body, %entry + %i.02 = phi i32 [ 0, %entry ], [ %inc, %for.body ] + %0 = load i128* %b, align 16 + %1 = load i128* %c, align 16 + %shl = ashr i128 %0, %1 + store i128 %shl, i128* %a, align 16 + %inc = add nsw i32 %i.02, 1 + %exitcond = icmp eq i32 %inc, 2048 + br i1 %exitcond, label %for.end, label %for.body + +for.end: ; preds = %for.body + ret void + +; CHECK-LABEL: @foo2 +; CHECK-NOT: mtctr +} + +; Function Attrs: nounwind +define void @foo3(i128* %a, i128* readonly %b, i128* readonly %c) #0 { +entry: + br label %for.body + +for.body: ; preds = %for.body, %entry + %i.02 = phi i32 [ 0, %entry ], [ %inc, %for.body ] + %0 = load i128* %b, align 16 + %1 = load i128* %c, align 16 + %shl = lshr i128 %0, %1 + store i128 %shl, i128* %a, align 16 + %inc = add nsw i32 %i.02, 1 + %exitcond = icmp eq i32 %inc, 2048 + br i1 %exitcond, label %for.end, label %for.body + +for.end: ; preds = %for.body + ret void + +; CHECK-LABEL: @foo3 +; CHECK-NOT: mtctr +} + +attributes #0 = { nounwind } + |