diff options
| -rw-r--r-- | lib/Transforms/Utils/SimplifyCFG.cpp | 1 | ||||
| -rw-r--r-- | test/Transforms/SimplifyCFG/extract-cost.ll | 22 |
2 files changed, 23 insertions, 0 deletions
diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp index cb747f6f51..bfc7f4ace7 100644 --- a/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/lib/Transforms/Utils/SimplifyCFG.cpp @@ -213,6 +213,7 @@ static unsigned ComputeSpeculationCost(const User *I) { if (!cast<GEPOperator>(I)->hasAllConstantIndices()) return UINT_MAX; return 1; + case Instruction::ExtractValue: case Instruction::Load: case Instruction::Add: case Instruction::Sub: diff --git a/test/Transforms/SimplifyCFG/extract-cost.ll b/test/Transforms/SimplifyCFG/extract-cost.ll new file mode 100644 index 0000000000..9c867256e7 --- /dev/null +++ b/test/Transforms/SimplifyCFG/extract-cost.ll @@ -0,0 +1,22 @@ +; RUN: opt -simplifycfg -S < %s | FileCheck %s + +declare { i32, i1 } @llvm.uadd.with.overflow.i32(i32, i32) #1 + +define i32 @f(i32 %a, i32 %b) #0 { +entry: + %uadd = tail call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %a, i32 %b) + %cmp = extractvalue { i32, i1 } %uadd, 1 + br i1 %cmp, label %return, label %if.end + +if.end: ; preds = %entry + %0 = extractvalue { i32, i1 } %uadd, 0 + br label %return + +return: ; preds = %entry, %if.end + %retval.0 = phi i32 [ %0, %if.end ], [ 0, %entry ] + ret i32 %retval.0 + +; CHECK-LABEL: @f( +; CHECK-NOT: phi +; CHECK: select +} |