diff options
Diffstat (limited to 'llvm/test/Transforms/ADCE/domtree-DoubleDeletion.ll')
| -rw-r--r-- | llvm/test/Transforms/ADCE/domtree-DoubleDeletion.ll | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/llvm/test/Transforms/ADCE/domtree-DoubleDeletion.ll b/llvm/test/Transforms/ADCE/domtree-DoubleDeletion.ll new file mode 100644 index 00000000000..018eb79b26f --- /dev/null +++ b/llvm/test/Transforms/ADCE/domtree-DoubleDeletion.ll @@ -0,0 +1,39 @@ +; RUN: opt < %s -gvn -simplifycfg -adce | llvm-dis +; RUN: opt < %s -gvn -simplifycfg -adce -verify-dom-info | llvm-dis + +; This test makes sure that the DominatorTree properly handles +; deletion of edges that go to forward-unreachable regions. +; In this case, %land.end is already forward unreachable when +; the DT gets informed about the deletion of %entry -> %land.end. + +@a = common global i32 0, align 4 + +define i32 @main() { +entry: + %retval = alloca i32, align 4 + store i32 0, i32* %retval, align 4 + %0 = load i32, i32* @a, align 4 + %cmp = icmp ne i32 %0, 1 + br i1 %cmp, label %land.rhs, label %land.end4 + +land.rhs: ; preds = %entry + %1 = load i32, i32* @a, align 4 + %tobool = icmp ne i32 %1, 0 + br i1 %tobool, label %land.rhs1, label %land.end + +land.rhs1: ; preds = %land.rhs + br label %land.end + +land.end: ; preds = %land.rhs1, %land.rhs + %2 = phi i1 [ false, %land.rhs ], [ true, %land.rhs1 ] + %land.ext = zext i1 %2 to i32 + %conv = trunc i32 %land.ext to i16 + %conv2 = sext i16 %conv to i32 + %tobool3 = icmp ne i32 %conv2, 0 + br label %land.end4 + +land.end4: ; preds = %land.end, %entry + %3 = phi i1 [ false, %entry ], [ %tobool3, %land.end ] + %land.ext5 = zext i1 %3 to i32 + ret i32 0 +} |
