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Diffstat (limited to 'test/Transforms/InstCombine/2007-02-01-LoadSinkAlloca.ll')
-rw-r--r-- | test/Transforms/InstCombine/2007-02-01-LoadSinkAlloca.ll | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/2007-02-01-LoadSinkAlloca.ll b/test/Transforms/InstCombine/2007-02-01-LoadSinkAlloca.ll new file mode 100644 index 000000000000..e559cdd914a9 --- /dev/null +++ b/test/Transforms/InstCombine/2007-02-01-LoadSinkAlloca.ll @@ -0,0 +1,45 @@ +; RUN: llvm-as < %s | opt -instcombine -mem2reg | llvm-dis | grep {%A = alloca} +; RUN: llvm-as < %s | opt -instcombine -mem2reg | llvm-dis | \ +; RUN: not grep {%B = alloca} +; END. + +; Ensure that instcombine doesn't sink the loads in entry/cond_true into +; cond_next. Doing so prevents mem2reg from promoting the B alloca. + +define i32 @test2(i32 %C) { +entry: + %A = alloca i32 + %B = alloca i32 + %tmp = call i32 (...)* @bar( i32* %A ) ; <i32> [#uses=0] + %T = load i32* %A ; <i32> [#uses=1] + %tmp2 = icmp eq i32 %C, 0 ; <i1> [#uses=1] + br i1 %tmp2, label %cond_next, label %cond_true + +cond_true: ; preds = %entry + store i32 123, i32* %B + call i32 @test2( i32 123 ) ; <i32>:0 [#uses=0] + %T1 = load i32* %B ; <i32> [#uses=1] + br label %cond_next + +cond_next: ; preds = %cond_true, %entry + %tmp1.0 = phi i32 [ %T1, %cond_true ], [ %T, %entry ] ; <i32> [#uses=1] + %tmp7 = call i32 (...)* @baq( ) ; <i32> [#uses=0] + %tmp8 = call i32 (...)* @baq( ) ; <i32> [#uses=0] + %tmp9 = call i32 (...)* @baq( ) ; <i32> [#uses=0] + %tmp10 = call i32 (...)* @baq( ) ; <i32> [#uses=0] + %tmp11 = call i32 (...)* @baq( ) ; <i32> [#uses=0] + %tmp12 = call i32 (...)* @baq( ) ; <i32> [#uses=0] + %tmp13 = call i32 (...)* @baq( ) ; <i32> [#uses=0] + %tmp14 = call i32 (...)* @baq( ) ; <i32> [#uses=0] + %tmp15 = call i32 (...)* @baq( ) ; <i32> [#uses=0] + %tmp16 = call i32 (...)* @baq( ) ; <i32> [#uses=0] + %tmp17 = call i32 (...)* @baq( ) ; <i32> [#uses=0] + %tmp18 = call i32 (...)* @baq( ) ; <i32> [#uses=0] + %tmp19 = call i32 (...)* @baq( ) ; <i32> [#uses=0] + %tmp20 = call i32 (...)* @baq( ) ; <i32> [#uses=0] + ret i32 %tmp1.0 +} + +declare i32 @bar(...) + +declare i32 @baq(...) |