derek.holloway
7502bf64a4
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40 lines
1.4 KiB
LLVM
40 lines
1.4 KiB
LLVM
; RUN: opt < %s -passes=gvn,simplifycfg,adce -simplifycfg-require-and-preserve-domtree=1 | llvm-dis
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; RUN: opt < %s -passes=gvn,simplifycfg,adce -simplifycfg-require-and-preserve-domtree=1 -verify-dom-info | llvm-dis
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; This test makes sure that the DominatorTree properly handles
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; deletion of edges that go to forward-unreachable regions.
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; In this case, %land.end is already forward unreachable when
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; the DT gets informed about the deletion of %entry -> %land.end.
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@a = common global i32 0, align 4
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define i32 @main() {
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entry:
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%retval = alloca i32, align 4
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store i32 0, ptr %retval, align 4
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%0 = load i32, ptr @a, align 4
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%cmp = icmp ne i32 %0, 1
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br i1 %cmp, label %land.rhs, label %land.end4
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land.rhs: ; preds = %entry
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%1 = load i32, ptr @a, align 4
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%tobool = icmp ne i32 %1, 0
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br i1 %tobool, label %land.rhs1, label %land.end
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land.rhs1: ; preds = %land.rhs
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br label %land.end
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land.end: ; preds = %land.rhs1, %land.rhs
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%2 = phi i1 [ false, %land.rhs ], [ true, %land.rhs1 ]
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%land.ext = zext i1 %2 to i32
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%conv = trunc i32 %land.ext to i16
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%conv2 = sext i16 %conv to i32
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%tobool3 = icmp ne i32 %conv2, 0
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br label %land.end4
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land.end4: ; preds = %land.end, %entry
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%3 = phi i1 [ false, %entry ], [ %tobool3, %land.end ]
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%land.ext5 = zext i1 %3 to i32
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ret i32 0
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}
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