Index: llvm/test/Transforms/InstSimplify/load.ll =================================================================== --- llvm/test/Transforms/InstSimplify/load.ll +++ llvm/test/Transforms/InstSimplify/load.ll @@ -4,10 +4,18 @@ @zeroinit = constant {} zeroinitializer @poison = constant {} poison +%s = type {i32, i32, i32} + @constzeroarray = internal constant [4 x i32] zeroinitializer +@constzerostruct = internal constant %s zeroinitializer + +@constalleqarray = internal constant [4 x i32] [i32 1, i32 1, i32 1, i32 1] +@constalleqarrayi8 = internal constant [2 x i8] [i8 1, i8 1] +@constalleqstruct = internal constant %s {i32 1, i32 1, i32 1} -@constarray = internal constant [4 x i32] [i32 1, i32 1, i32 1, i32 1] -@constarrayi8 = internal constant [2 x i8] [i8 1, i8 1] +@constarray = internal constant [4 x i32] [i32 1, i32 2, i32 3, i32 4] +@constarrayi8 = internal constant [2 x i8] [i8 1, i8 2] +@conststruct = internal constant %s {i32 1, i32 2, i32 3} define i32 @crash_on_zeroinit() { ; CHECK-LABEL: @crash_on_zeroinit( @@ -65,6 +73,50 @@ ret i8 %load } +define i32 @load_gep_const_zero_struct(i32 %idx) { +; CHECK-LABEL: @load_gep_const_zero_struct( +; CHECK-NEXT: ret i32 0 +; + %gep = getelementptr inbounds %s, ptr @constzerostruct, i32 %idx + %load = load i32, ptr %gep + ret i32 %load +} + +define i32 @load_gep_const_alleq_array(i64 %idx) { +; CHECK-LABEL: @load_gep_const_alleq_array( +; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds [4 x i32], ptr @constalleqarray, i64 0, i64 [[IDX:%.*]] +; CHECK-NEXT: [[LOAD:%.*]] = load i32, ptr [[GEP]], align 4 +; CHECK-NEXT: ret i32 [[LOAD]] +; + %gep = getelementptr inbounds [4 x i32], ptr @constalleqarray, i64 0, i64 %idx + %load = load i32, ptr %gep + ret i32 %load +} + +define i8 @load_i8_multi_gep_const_alleq_array(i64 %idx1, i64 %idx2) { +; CHECK-LABEL: @load_i8_multi_gep_const_alleq_array( +; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds i8, ptr @constalleqarrayi8, i64 [[IDX1:%.*]] +; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr [[GEP1]], i64 [[IDX2:%.*]] +; CHECK-NEXT: [[LOAD:%.*]] = load i8, ptr [[GEP]], align 1 +; CHECK-NEXT: ret i8 [[LOAD]] +; + %gep1 = getelementptr inbounds i8, ptr @constalleqarrayi8, i64 %idx1 + %gep = getelementptr inbounds i8, ptr %gep1, i64 %idx2 + %load = load i8, ptr %gep + ret i8 %load +} + +define i32 @load_gep_const_alleq_struct(i32 %idx) { +; CHECK-LABEL: @load_gep_const_alleq_struct( +; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds [[S:%.*]], ptr @constalleqstruct, i32 [[IDX:%.*]] +; CHECK-NEXT: [[LOAD:%.*]] = load i32, ptr [[GEP]], align 4 +; CHECK-NEXT: ret i32 [[LOAD]] +; + %gep = getelementptr inbounds %s, ptr @constalleqstruct, i32 %idx + %load = load i32, ptr %gep + ret i32 %load +} + define i32 @load_gep_const_array(i64 %idx) { ; CHECK-LABEL: @load_gep_const_array( ; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds [4 x i32], ptr @constarray, i64 0, i64 [[IDX:%.*]] @@ -88,3 +140,14 @@ %load = load i8, ptr %gep ret i8 %load } + +define i32 @load_gep_const_struct(i32 %idx) { +; CHECK-LABEL: @load_gep_const_struct( +; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds [[S:%.*]], ptr @conststruct, i32 [[IDX:%.*]] +; CHECK-NEXT: [[LOAD:%.*]] = load i32, ptr [[GEP]], align 4 +; CHECK-NEXT: ret i32 [[LOAD]] +; + %gep = getelementptr inbounds %s, ptr @conststruct, i32 %idx + %load = load i32, ptr %gep + ret i32 %load +}