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| author | Devang Patel <dpatel@apple.com> | 2007-12-22 01:32:53 +0000 |
|---|---|---|
| committer | Devang Patel <dpatel@apple.com> | 2007-12-22 01:32:53 +0000 |
| commit | 01666bf74bd72d43426e62ac9d921a8db0a9179e (patch) | |
| tree | 75076d8d285f394a097943404d6db1f7d29dd36f /test/Transforms/SimplifyCFG | |
| parent | 889ac61113e82abb71138d91a9b7edd6be76cbe0 (diff) | |
| download | llvm-01666bf74bd72d43426e62ac9d921a8db0a9179e.tar.gz llvm-01666bf74bd72d43426e62ac9d921a8db0a9179e.tar.bz2 llvm-01666bf74bd72d43426e62ac9d921a8db0a9179e.tar.xz | |
If succ has succ itself as one of the predecessors then do
not merge current bb and succ even if bb's terminator is
unconditional branch to succ.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45305 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/SimplifyCFG')
| -rw-r--r-- | test/Transforms/SimplifyCFG/2007-12-21-Crash.ll | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyCFG/2007-12-21-Crash.ll b/test/Transforms/SimplifyCFG/2007-12-21-Crash.ll new file mode 100644 index 0000000000..31a22f55ec --- /dev/null +++ b/test/Transforms/SimplifyCFG/2007-12-21-Crash.ll @@ -0,0 +1,60 @@ +; RUN: llvm-as < %s | opt -std-compile-opts -disable-output + +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" + +define i32 @bork() { +entry: + %retval = alloca i32 ; <i32*> [#uses=2] + %opt = alloca i32 ; <i32*> [#uses=3] + %undo = alloca i32 ; <i32*> [#uses=3] + %tmp = alloca i32 ; <i32*> [#uses=3] + %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0] + store i32 0, i32* %undo, align 4 + br label %bb5 + +bb: ; preds = %bb5 + %tmp1 = load i32* %opt, align 4 ; <i32> [#uses=1] + switch i32 %tmp1, label %bb4 [ + i32 102, label %bb3 + i32 110, label %bb2 + ] + +bb2: ; preds = %bb + store i32 1, i32* %undo, align 4 + br label %bb3 + +bb3: ; preds = %bb2, %bb + br label %bb5 + +bb4: ; preds = %bb + store i32 258, i32* %tmp, align 4 + br label %bb13 + +bb5: ; preds = %bb3, %entry + %tmp6 = call i32 (...)* @foo( ) nounwind ; <i32> [#uses=1] + store i32 %tmp6, i32* %opt, align 4 + %tmp7 = load i32* %opt, align 4 ; <i32> [#uses=1] + %tmp8 = icmp ne i32 %tmp7, -1 ; <i1> [#uses=1] + %tmp89 = zext i1 %tmp8 to i8 ; <i8> [#uses=1] + %toBool = icmp ne i8 %tmp89, 0 ; <i1> [#uses=1] + br i1 %toBool, label %bb, label %bb10 + +bb10: ; preds = %bb5 + %tmp11 = load i32* %undo, align 4 ; <i32> [#uses=1] + %tmp12 = call i32 (...)* @bar( i32 %tmp11 ) nounwind ; <i32> [#uses=0] + store i32 1, i32* %tmp, align 4 + br label %bb13 + +bb13: ; preds = %bb10, %bb4 + %tmp14 = load i32* %tmp, align 4 ; <i32> [#uses=1] + store i32 %tmp14, i32* %retval, align 4 + br label %return + +return: ; preds = %bb13 + %retval15 = load i32* %retval ; <i32> [#uses=1] + ret i32 %retval15 +} + +declare i32 @foo(...) + +declare i32 @bar(...) |