1 ; RUN: opt < %s -instcombine -mem2reg -S | grep "%A = alloca" 2 ; RUN: opt < %s -instcombine -mem2reg -S | \ 3 ; RUN: not grep "%B = alloca" 4 ; END. 5 6 ; Ensure that instcombine doesn't sink the loads in entry/cond_true into 7 ; cond_next. Doing so prevents mem2reg from promoting the B alloca. 8 9 define i32 @test2(i32 %C) { 10 entry: 11 %A = alloca i32 12 %B = alloca i32 13 %tmp = call i32 (...) @bar( i32* %A ) ; <i32> [#uses=0] 14 %T = load i32, i32* %A ; <i32> [#uses=1] 15 %tmp2 = icmp eq i32 %C, 0 ; <i1> [#uses=1] 16 br i1 %tmp2, label %cond_next, label %cond_true 17 18 cond_true: ; preds = %entry 19 store i32 123, i32* %B 20 call i32 @test2( i32 123 ) ; <i32>:0 [#uses=0] 21 %T1 = load i32, i32* %B ; <i32> [#uses=1] 22 br label %cond_next 23 24 cond_next: ; preds = %cond_true, %entry 25 %tmp1.0 = phi i32 [ %T1, %cond_true ], [ %T, %entry ] ; <i32> [#uses=1] 26 %tmp7 = call i32 (...) @baq( ) ; <i32> [#uses=0] 27 %tmp8 = call i32 (...) @baq( ) ; <i32> [#uses=0] 28 %tmp9 = call i32 (...) @baq( ) ; <i32> [#uses=0] 29 %tmp10 = call i32 (...) @baq( ) ; <i32> [#uses=0] 30 %tmp11 = call i32 (...) @baq( ) ; <i32> [#uses=0] 31 %tmp12 = call i32 (...) @baq( ) ; <i32> [#uses=0] 32 %tmp13 = call i32 (...) @baq( ) ; <i32> [#uses=0] 33 %tmp14 = call i32 (...) @baq( ) ; <i32> [#uses=0] 34 %tmp15 = call i32 (...) @baq( ) ; <i32> [#uses=0] 35 %tmp16 = call i32 (...) @baq( ) ; <i32> [#uses=0] 36 %tmp17 = call i32 (...) @baq( ) ; <i32> [#uses=0] 37 %tmp18 = call i32 (...) @baq( ) ; <i32> [#uses=0] 38 %tmp19 = call i32 (...) @baq( ) ; <i32> [#uses=0] 39 %tmp20 = call i32 (...) @baq( ) ; <i32> [#uses=0] 40 ret i32 %tmp1.0 41 } 42 43 declare i32 @bar(...) 44 45 declare i32 @baq(...) 46
