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| -rw-r--r-- | llvm/test/Regression/Transforms/SimplifyCFG/2005-12-03-IncorrectPHIFold.ll | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/llvm/test/Regression/Transforms/SimplifyCFG/2005-12-03-IncorrectPHIFold.ll b/llvm/test/Regression/Transforms/SimplifyCFG/2005-12-03-IncorrectPHIFold.ll new file mode 100644 index 00000000000..18cbc176526 --- /dev/null +++ b/llvm/test/Regression/Transforms/SimplifyCFG/2005-12-03-IncorrectPHIFold.ll @@ -0,0 +1,138 @@ +; Make sure this doesn't turn into an infinite loop + +; RUN: llvm-as < %s | opt -simplifycfg -constprop -simplifycfg | llvm-dis | grep bb86 + + %struct.anon = type { uint, int, int, int, [1024 x sbyte] } +%_zero_ = external global %struct.anon* ; <%struct.anon**> [#uses=2] +%_one_ = external global %struct.anon* ; <%struct.anon**> [#uses=4] +%str = internal constant [4 x sbyte] c"%d\0A\00" ; <[4 x sbyte]*> [#uses=1] + +implementation ; Functions: + + +declare int %bc_compare(%struct.anon*, %struct.anon*) + +declare void %free_num(%struct.anon**) + +declare %struct.anon* %copy_num(%struct.anon*) + +declare void %init_num(%struct.anon**) + +declare %struct.anon* %new_num(int, int) + +declare void %int2num(%struct.anon**, int) + +declare void %bc_multiply(%struct.anon*, %struct.anon*, %struct.anon**, int) + +declare void %bc_raise(%struct.anon*, %struct.anon*, %struct.anon**, int) + +declare int %bc_divide(%struct.anon*, %struct.anon*, %struct.anon**, int) + +declare void %bc_add(%struct.anon*, %struct.anon*, %struct.anon**) + +declare int %_do_compare(%struct.anon*, %struct.anon*, int, int) + +declare int %printf(sbyte*, ...) + +int %bc_sqrt(%struct.anon** %num, int %scale) { +entry: + %guess = alloca %struct.anon* ; <%struct.anon**> [#uses=15] + %guess1 = alloca %struct.anon* ; <%struct.anon**> [#uses=12] + %point5 = alloca %struct.anon* ; <%struct.anon**> [#uses=4] + %tmp = load %struct.anon** %num ; <%struct.anon*> [#uses=1] + %tmp1 = load %struct.anon** %_zero_ ; <%struct.anon*> [#uses=1] + %tmp = call int %bc_compare( %struct.anon* %tmp, %struct.anon* %tmp1 ) ; <int> [#uses=2] + %tmp = setlt int %tmp, 0 ; <bool> [#uses=1] + br bool %tmp, label %cond_true, label %cond_false + +cond_true: ; preds = %entry + ret int 0 + +cond_false: ; preds = %entry + %tmp5 = seteq int %tmp, 0 ; <bool> [#uses=1] + br bool %tmp5, label %cond_true6, label %cond_next13 + +cond_true6: ; preds = %cond_false + call void %free_num( %struct.anon** %num ) + %tmp8 = load %struct.anon** %_zero_ ; <%struct.anon*> [#uses=1] + %tmp9 = call %struct.anon* %copy_num( %struct.anon* %tmp8 ) ; <%struct.anon*> [#uses=1] + store %struct.anon* %tmp9, %struct.anon** %num + ret int 1 + +cond_next13: ; preds = %cond_false + %tmp15 = load %struct.anon** %num ; <%struct.anon*> [#uses=1] + %tmp16 = load %struct.anon** %_one_ ; <%struct.anon*> [#uses=1] + %tmp17 = call int %bc_compare( %struct.anon* %tmp15, %struct.anon* %tmp16 ) ; <int> [#uses=2] + %tmp19 = seteq int %tmp17, 0 ; <bool> [#uses=1] + br bool %tmp19, label %cond_true20, label %cond_next27 + +cond_true20: ; preds = %cond_next13 + call void %free_num( %struct.anon** %num ) + %tmp22 = load %struct.anon** %_one_ ; <%struct.anon*> [#uses=1] + %tmp23 = call %struct.anon* %copy_num( %struct.anon* %tmp22 ) ; <%struct.anon*> [#uses=1] + store %struct.anon* %tmp23, %struct.anon** %num + ret int 1 + +cond_next27: ; preds = %cond_next13 + %tmp29 = load %struct.anon** %num ; <%struct.anon*> [#uses=1] + %tmp30 = getelementptr %struct.anon* %tmp29, int 0, uint 2 ; <int*> [#uses=1] + %tmp31 = load int* %tmp30 ; <int> [#uses=2] + %tmp33 = setge int %tmp31, %scale ; <bool> [#uses=1] + %max = select bool %tmp33, int %tmp31, int %scale ; <int> [#uses=4] + %tmp35 = add int %max, 2 ; <int> [#uses=2] + call void %init_num( %struct.anon** %guess ) + call void %init_num( %struct.anon** %guess1 ) + %tmp36 = call %struct.anon* %new_num( int 1, int 1 ) ; <%struct.anon*> [#uses=2] + store %struct.anon* %tmp36, %struct.anon** %point5 + %tmp = getelementptr %struct.anon* %tmp36, int 0, uint 4, int 1 ; <sbyte*> [#uses=1] + store sbyte 5, sbyte* %tmp + %tmp39 = setlt int %tmp17, 0 ; <bool> [#uses=1] + br bool %tmp39, label %cond_true40, label %cond_false43 + +cond_true40: ; preds = %cond_next27 + %tmp41 = load %struct.anon** %_one_ ; <%struct.anon*> [#uses=1] + %tmp42 = call %struct.anon* %copy_num( %struct.anon* %tmp41 ) ; <%struct.anon*> [#uses=1] + store %struct.anon* %tmp42, %struct.anon** %guess + br label %bb80.outer + +cond_false43: ; preds = %cond_next27 + call void %int2num( %struct.anon** %guess, int 10 ) + %tmp45 = load %struct.anon** %num ; <%struct.anon*> [#uses=1] + %tmp46 = getelementptr %struct.anon* %tmp45, int 0, uint 1 ; <int*> [#uses=1] + %tmp47 = load int* %tmp46 ; <int> [#uses=1] + call void %int2num( %struct.anon** %guess1, int %tmp47 ) + %tmp48 = load %struct.anon** %guess1 ; <%struct.anon*> [#uses=1] + %tmp49 = load %struct.anon** %point5 ; <%struct.anon*> [#uses=1] + call void %bc_multiply( %struct.anon* %tmp48, %struct.anon* %tmp49, %struct.anon** %guess1, int %max ) + %tmp51 = load %struct.anon** %guess1 ; <%struct.anon*> [#uses=1] + %tmp52 = getelementptr %struct.anon* %tmp51, int 0, uint 2 ; <int*> [#uses=1] + store int 0, int* %tmp52 + %tmp53 = load %struct.anon** %guess ; <%struct.anon*> [#uses=1] + %tmp54 = load %struct.anon** %guess1 ; <%struct.anon*> [#uses=1] + call void %bc_raise( %struct.anon* %tmp53, %struct.anon* %tmp54, %struct.anon** %guess, int %max ) + br label %bb80.outer + +bb80.outer: ; preds = %cond_true77, %cond_next56 + %done.1.ph = phi int [ 1, %cond_true83 ], [0, %cond_true40], [0, %cond_false43] ; <int> [#uses=1] + br label %bb80 + +bb80: ; preds = %bb80.outer, %cond_true83 + %tmp82 = seteq int %done.1.ph, 0 ; <bool> [#uses=1] + br bool %tmp82, label %cond_true83, label %bb86 + +cond_true83: ; preds = %bb80 + %tmp71 = call int %_do_compare( %struct.anon* null, %struct.anon* null, int 0, int 1 ) ; <int> [#uses=2] + %tmp76 = seteq int %tmp71, 0 ; <bool> [#uses=1] + br bool %tmp76, label %bb80.outer, label %bb80 + +bb86: ; preds = %bb80 + call void %free_num( %struct.anon** %num ) + %tmp88 = load %struct.anon** %guess ; <%struct.anon*> [#uses=1] + %tmp89 = load %struct.anon** %_one_ ; <%struct.anon*> [#uses=1] + %tmp92 = call int %bc_divide( %struct.anon* %tmp88, %struct.anon* %tmp89, %struct.anon** %num, int %max ) ; <int> [#uses=0] + call void %free_num( %struct.anon** %guess ) + call void %free_num( %struct.anon** %guess1 ) + call void %free_num( %struct.anon** %point5 ) + ret int 1 +} + |
