diff options
Diffstat (limited to 'llvm/test/Transforms/InstCombine/2004-09-20-BadLoadCombine2.ll')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/2004-09-20-BadLoadCombine2.ll | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/2004-09-20-BadLoadCombine2.ll b/llvm/test/Transforms/InstCombine/2004-09-20-BadLoadCombine2.ll new file mode 100644 index 00000000000..3585659452b --- /dev/null +++ b/llvm/test/Transforms/InstCombine/2004-09-20-BadLoadCombine2.ll @@ -0,0 +1,25 @@ +; RUN: llvm-as < %s | opt -instcombine -mem2reg -simplifycfg | \ +; RUN: llvm-dis | grep -v store | not grep {int 1} + +; Test to make sure that instcombine does not accidentally propagate the load +; into the PHI, which would break the program. + +define i32 @test(i1 %C) { +entry: + %X = alloca i32 ; <i32*> [#uses=3] + %X2 = alloca i32 ; <i32*> [#uses=2] + store i32 1, i32* %X + store i32 2, i32* %X2 + br i1 %C, label %cond_true.i, label %cond_continue.i + +cond_true.i: ; preds = %entry + br label %cond_continue.i + +cond_continue.i: ; preds = %cond_true.i, %entry + %mem_tmp.i.0 = phi i32* [ %X, %cond_true.i ], [ %X2, %entry ] ; <i32*> [#uses=1] + store i32 3, i32* %X + %tmp.3 = load i32* %mem_tmp.i.0 ; <i32> [#uses=1] + ret i32 %tmp.3 +} + + |
