37 lines
683 B
LLVM
37 lines
683 B
LLVM
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; RUN: opt < %s -passes=gvn,jump-threading -enable-pre -S | FileCheck %s
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@H = common global i32 0
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@G = common global i32 0
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define i32 @test(i1 %cond, i32 %v) nounwind {
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; CHECK-LABEL: @test
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entry:
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br i1 %cond, label %bb, label %bb1
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bb:
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; CHECK: store
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; CHECK-NOT: br label %return
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%add.1 = add nuw nsw i32 %v, -1
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store i32 %add.1, ptr @G, align 4
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br label %merge
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bb1:
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br label %merge
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merge:
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%add.2 = add i32 %v, -1
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%cmp = icmp sgt i32 %add.2, 0
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br i1 %cmp, label %action, label %return
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action:
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; CHECK: store
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; CHECK-NEXT: br label %return
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store i32 %add.2, ptr @H, align 4
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br label %return
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return:
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%p = phi i32 [0, %merge], [1, %action]
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ret i32 %p
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}
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