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67 lines
1.3 KiB
LLVM
67 lines
1.3 KiB
LLVM
; RUN: llvm-as < %s | opt -simplifycfg -adce | llvm-dis | \
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; RUN: not grep {call void @f1}
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; END.
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declare void @f1()
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declare void @f2()
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declare void @f3()
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declare void @f4()
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define i32 @test1(i32 %X, i1 %D) {
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E:
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%C = icmp eq i32 %X, 0 ; <i1> [#uses=2]
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br i1 %C, label %T, label %F
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T: ; preds = %A, %E
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br i1 %C, label %B, label %A
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A: ; preds = %T
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call void @f1( )
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br i1 %D, label %T, label %F
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B: ; preds = %T
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call void @f2( )
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ret i32 345
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F: ; preds = %A, %E
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call void @f3( )
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ret i32 123
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}
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define i32 @test2(i32 %X, i1 %D) {
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E:
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%C = icmp eq i32 %X, 0 ; <i1> [#uses=2]
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br i1 %C, label %T, label %F
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T: ; preds = %A, %E
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%P = phi i1 [ true, %E ], [ %C, %A ] ; <i1> [#uses=1]
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br i1 %P, label %B, label %A
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A: ; preds = %T
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call void @f1( )
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br i1 %D, label %T, label %F
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B: ; preds = %T
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call void @f2( )
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ret i32 345
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F: ; preds = %A, %E
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call void @f3( )
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ret i32 123
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}
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define i32 @test3(i32 %X, i1 %D, i32* %AP, i32* %BP) {
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E:
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%C = icmp eq i32 %X, 0 ; <i1> [#uses=2]
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br i1 %C, label %T, label %F
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T: ; preds = %A, %E
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call void @f3( )
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%XX = load i32* %AP ; <i32> [#uses=1]
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store i32 %XX, i32* %BP
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br i1 %C, label %B, label %A
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A: ; preds = %T
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call void @f1( )
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br i1 %D, label %T, label %F
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B: ; preds = %T
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call void @f2( )
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ret i32 345
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F: ; preds = %A, %E
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call void @f3( )
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ret i32 123
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}
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