53 lines
1.2 KiB
LLVM
53 lines
1.2 KiB
LLVM
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; RUN: opt < %s -gvn -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 @test1(i1 %cond, i32 %v) nounwind {
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; CHECK-LABEL: @test1
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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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%add.1 = add nuw nsw i32 %v, 42
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; CHECK: %add.1 = add i32 %v, 42
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store i32 %add.1, i32* @G, align 4
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br label %return
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bb1:
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; CHECK: %.pre = add i32 %v, 42
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br label %return
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return:
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; CHECK: %add.2.pre-phi = phi i32 [ %.pre, %bb1 ], [ %add.1, %bb ]
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; CHECK-NEXT: store i32 %add.2.pre-phi, i32* @H, align 4
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; CHECK-NEXT: ret i32 0
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%add.2 = add i32 %v, 42
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store i32 %add.2, i32* @H, align 4
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ret i32 0
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}
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define i32 @test2(i1 %cond, i32 %v) nounwind {
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; CHECK-LABEL: @test2
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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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%add.1 = add i32 %v, 42
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; CHECK: %add.1 = add i32 %v, 42
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store i32 %add.1, i32* @G, align 4
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br label %return
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bb1:
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; CHECK: %.pre = add nuw nsw i32 %v, 42
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br label %return
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return:
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; CHECK: %add.2.pre-phi = phi i32 [ %.pre, %bb1 ], [ %add.1, %bb ]
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; CHECK-NEXT: store i32 %add.2.pre-phi, i32* @H, align 4
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; CHECK-NEXT: ret i32 0
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%add.2 = add nuw nsw i32 %v, 42
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store i32 %add.2, i32* @H, align 4
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ret i32 0
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}
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