2009-09-11 18:01:28 +00:00
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; RUN: opt < %s -gvn -S | grep {br i1 false}
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2009-04-01 23:53:49 +00:00
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@a = external global i32 ; <i32*> [#uses=7]
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define i32 @foo() nounwind {
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entry:
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%0 = load i32* @a, align 4 ; <i32> [#uses=1]
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%1 = icmp eq i32 %0, 4 ; <i1> [#uses=1]
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br i1 %1, label %bb, label %bb1
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bb: ; preds = %entry
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br label %bb8
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bb1: ; preds = %entry
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%2 = load i32* @a, align 4 ; <i32> [#uses=1]
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%3 = icmp eq i32 %2, 5 ; <i1> [#uses=1]
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br i1 %3, label %bb2, label %bb3
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bb2: ; preds = %bb1
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br label %bb8
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bb3: ; preds = %bb1
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%4 = load i32* @a, align 4 ; <i32> [#uses=1]
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%5 = icmp eq i32 %4, 4 ; <i1> [#uses=1]
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br i1 %5, label %bb4, label %bb5
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bb4: ; preds = %bb3
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%6 = load i32* @a, align 4 ; <i32> [#uses=1]
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%7 = add i32 %6, 5 ; <i32> [#uses=1]
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br label %bb8
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bb5: ; preds = %bb3
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%8 = load i32* @a, align 4 ; <i32> [#uses=1]
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%9 = icmp eq i32 %8, 5 ; <i1> [#uses=1]
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br i1 %9, label %bb6, label %bb7
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bb6: ; preds = %bb5
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%10 = load i32* @a, align 4 ; <i32> [#uses=1]
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%11 = add i32 %10, 4 ; <i32> [#uses=1]
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br label %bb8
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bb7: ; preds = %bb5
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%12 = load i32* @a, align 4 ; <i32> [#uses=1]
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br label %bb8
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bb8: ; preds = %bb7, %bb6, %bb4, %bb2, %bb
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%.0 = phi i32 [ %12, %bb7 ], [ %11, %bb6 ], [ %7, %bb4 ], [ 4, %bb2 ], [ 5, %bb ] ; <i32> [#uses=1]
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br label %return
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return: ; preds = %bb8
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ret i32 %.0
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}
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