; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; This testcase tests for various features the basicaa test should be able to ; determine, as noted in the comments. ; RUN: opt < %s -basic-aa -gvn -instcombine -dce -S | FileCheck %s --check-prefixes=CHECK,NO_ASSUME ; RUN: opt < %s -basic-aa -gvn -instcombine -dce --enable-knowledge-retention -S | FileCheck %s --check-prefixes=CHECK,USE_ASSUME target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128" @Global = external global { i32 } declare void @external(i32*) declare void @llvm.assume(i1) ; Array test: Test that operations on one local array do not invalidate ; operations on another array. Important for scientific codes. ; define i32 @different_array_test(i64 %A, i64 %B) { ; CHECK-LABEL: @different_array_test( ; CHECK-NEXT: [[ARRAY11:%.*]] = alloca [100 x i32], align 4 ; CHECK-NEXT: [[ARRAY22:%.*]] = alloca [200 x i32], align 4 ; CHECK-NEXT: [[ARRAY22_SUB:%.*]] = getelementptr inbounds [200 x i32], [200 x i32]* [[ARRAY22]], i64 0, i64 0 ; CHECK-NEXT: [[ARRAY11_SUB:%.*]] = getelementptr inbounds [100 x i32], [100 x i32]* [[ARRAY11]], i64 0, i64 0 ; CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(i32* [[ARRAY11_SUB]], i32 4) ] ; CHECK-NEXT: call void @external(i32* nonnull [[ARRAY11_SUB]]) ; CHECK-NEXT: call void @external(i32* nonnull [[ARRAY22_SUB]]) ; CHECK-NEXT: [[POINTER2:%.*]] = getelementptr [200 x i32], [200 x i32]* [[ARRAY22]], i64 0, i64 [[B:%.*]] ; CHECK-NEXT: store i32 7, i32* [[POINTER2]], align 4 ; CHECK-NEXT: ret i32 0 ; %Array1 = alloca i32, i32 100 %Array2 = alloca i32, i32 200 call void @llvm.assume(i1 true) ["align"(i32* %Array1, i32 4)] call void @external(i32* %Array1) call void @external(i32* %Array2) %pointer = getelementptr i32, i32* %Array1, i64 %A %val = load i32, i32* %pointer %pointer2 = getelementptr i32, i32* %Array2, i64 %B store i32 7, i32* %pointer2 %REMOVE = load i32, i32* %pointer ; redundant with above load %retval = sub i32 %REMOVE, %val ret i32 %retval } ; Constant index test: Constant indexes into the same array should not ; interfere with each other. Again, important for scientific codes. ; define i32 @constant_array_index_test() { ; CHECK-LABEL: @constant_array_index_test( ; CHECK-NEXT: [[ARRAY1:%.*]] = alloca [100 x i32], align 4 ; CHECK-NEXT: [[ARRAY1_SUB:%.*]] = getelementptr inbounds [100 x i32], [100 x i32]* [[ARRAY1]], i64 0, i64 0 ; CHECK-NEXT: call void @external(i32* nonnull [[ARRAY1_SUB]]) ; CHECK-NEXT: [[P2:%.*]] = getelementptr inbounds [100 x i32], [100 x i32]* [[ARRAY1]], i64 0, i64 6 ; CHECK-NEXT: store i32 1, i32* [[P2]], align 4 ; CHECK-NEXT: ret i32 0 ; %Array = alloca i32, i32 100 call void @external(i32* %Array) %P1 = getelementptr i32, i32* %Array, i64 7 %P2 = getelementptr i32, i32* %Array, i64 6 %A = load i32, i32* %P1 store i32 1, i32* %P2 ; Should not invalidate load %BREMOVE = load i32, i32* %P1 %Val = sub i32 %A, %BREMOVE ret i32 %Val } ; Test that if two pointers are spaced out by a constant getelementptr, that ; they cannot alias. define i32 @gep_distance_test(i32* %A) { ; NO_ASSUME-LABEL: @gep_distance_test( ; NO_ASSUME-NEXT: [[B:%.*]] = getelementptr i32, i32* [[A:%.*]], i64 2 ; NO_ASSUME-NEXT: store i32 7, i32* [[B]], align 4 ; NO_ASSUME-NEXT: ret i32 0 ; ; USE_ASSUME-LABEL: @gep_distance_test( ; USE_ASSUME-NEXT: [[B:%.*]] = getelementptr i32, i32* [[A:%.*]], i64 2 ; USE_ASSUME-NEXT: store i32 7, i32* [[B]], align 4 ; USE_ASSUME-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(i32* [[A]], i64 4), "nonnull"(i32* [[A]]), "align"(i32* [[A]], i64 4) ] ; USE_ASSUME-NEXT: ret i32 0 ; %REMOVEu = load i32, i32* %A %B = getelementptr i32, i32* %A, i64 2 ; Cannot alias A store i32 7, i32* %B %REMOVEv = load i32, i32* %A %r = sub i32 %REMOVEu, %REMOVEv ret i32 %r } ; Test that if two pointers are spaced out by a constant offset, that they ; cannot alias, even if there is a variable offset between them... define i32 @gep_distance_test2({i32,i32}* %A, i64 %distance) { ; NO_ASSUME-LABEL: @gep_distance_test2( ; NO_ASSUME-NEXT: [[B:%.*]] = getelementptr { i32, i32 }, { i32, i32 }* [[A:%.*]], i64 [[DISTANCE:%.*]], i32 1 ; NO_ASSUME-NEXT: store i32 7, i32* [[B]], align 4 ; NO_ASSUME-NEXT: ret i32 0 ; ; USE_ASSUME-LABEL: @gep_distance_test2( ; USE_ASSUME-NEXT: [[A1:%.*]] = getelementptr { i32, i32 }, { i32, i32 }* [[A:%.*]], i64 0, i32 0 ; USE_ASSUME-NEXT: [[B:%.*]] = getelementptr { i32, i32 }, { i32, i32 }* [[A]], i64 [[DISTANCE:%.*]], i32 1 ; USE_ASSUME-NEXT: store i32 7, i32* [[B]], align 4 ; USE_ASSUME-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(i32* [[A1]], i64 4), "nonnull"({ i32, i32 }* [[A]]), "align"(i32* [[A1]], i64 4) ] ; USE_ASSUME-NEXT: ret i32 0 ; %A1 = getelementptr {i32,i32}, {i32,i32}* %A, i64 0, i32 0 %REMOVEu = load i32, i32* %A1 %B = getelementptr {i32,i32}, {i32,i32}* %A, i64 %distance, i32 1 store i32 7, i32* %B ; B cannot alias A, it's at least 4 bytes away %REMOVEv = load i32, i32* %A1 %r = sub i32 %REMOVEu, %REMOVEv ret i32 %r } ; Test that we can do funny pointer things and that distance calc will still ; work. define i32 @gep_distance_test3(i32 * %A) { ; NO_ASSUME-LABEL: @gep_distance_test3( ; NO_ASSUME-NEXT: [[C1:%.*]] = getelementptr i32, i32* [[A:%.*]], i64 1 ; NO_ASSUME-NEXT: [[C:%.*]] = bitcast i32* [[C1]] to i8* ; NO_ASSUME-NEXT: store i8 42, i8* [[C]], align 1 ; NO_ASSUME-NEXT: ret i32 0 ; ; USE_ASSUME-LABEL: @gep_distance_test3( ; USE_ASSUME-NEXT: [[C1:%.*]] = getelementptr i32, i32* [[A:%.*]], i64 1 ; USE_ASSUME-NEXT: [[C:%.*]] = bitcast i32* [[C1]] to i8* ; USE_ASSUME-NEXT: store i8 42, i8* [[C]], align 4 ; USE_ASSUME-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(i32* [[A]], i64 4), "nonnull"(i32* [[A]]), "align"(i32* [[A]], i64 4) ] ; USE_ASSUME-NEXT: ret i32 0 ; %X = load i32, i32* %A %B = bitcast i32* %A to i8* %C = getelementptr i8, i8* %B, i64 4 store i8 42, i8* %C %Y = load i32, i32* %A %R = sub i32 %X, %Y ret i32 %R } ; Test that we can disambiguate globals reached through constantexpr geps define i32 @constexpr_test() { ; CHECK-LABEL: @constexpr_test( ; CHECK-NEXT: [[X:%.*]] = alloca i32, align 4 ; CHECK-NEXT: call void @external(i32* nonnull [[X]]) ; CHECK-NEXT: store i32 5, i32* getelementptr inbounds ({ i32 }, { i32 }* @Global, i64 0, i32 0), align 4 ; CHECK-NEXT: ret i32 0 ; %X = alloca i32 call void @external(i32* %X) %Y = load i32, i32* %X store i32 5, i32* getelementptr ({ i32 }, { i32 }* @Global, i64 0, i32 0) %REMOVE = load i32, i32* %X %retval = sub i32 %Y, %REMOVE ret i32 %retval } ; PR7589 ; These two index expressions are different, this cannot be CSE'd. define i16 @zext_sext_confusion(i16* %row2col, i5 %j) nounwind{ ; CHECK-LABEL: @zext_sext_confusion( ; CHECK-NEXT: entry: ; CHECK-NEXT: [[SUM5_CAST:%.*]] = zext i5 [[J:%.*]] to i64 ; CHECK-NEXT: [[P1:%.*]] = getelementptr i16, i16* [[ROW2COL:%.*]], i64 [[SUM5_CAST]] ; CHECK-NEXT: [[ROW2COL_LOAD_1_2:%.*]] = load i16, i16* [[P1]], align 1 ; CHECK-NEXT: [[SUM13_CAST31:%.*]] = sext i5 [[J]] to i6 ; CHECK-NEXT: [[SUM13_CAST:%.*]] = zext i6 [[SUM13_CAST31]] to i64 ; CHECK-NEXT: [[P2:%.*]] = getelementptr i16, i16* [[ROW2COL]], i64 [[SUM13_CAST]] ; CHECK-NEXT: [[ROW2COL_LOAD_1_6:%.*]] = load i16, i16* [[P2]], align 1 ; CHECK-NEXT: [[DOTRET:%.*]] = sub i16 [[ROW2COL_LOAD_1_6]], [[ROW2COL_LOAD_1_2]] ; CHECK-NEXT: ret i16 [[DOTRET]] ; entry: %sum5.cast = zext i5 %j to i64 ; [#uses=1] %P1 = getelementptr i16, i16* %row2col, i64 %sum5.cast %row2col.load.1.2 = load i16, i16* %P1, align 1 ; [#uses=1] %sum13.cast31 = sext i5 %j to i6 ; [#uses=1] %sum13.cast = zext i6 %sum13.cast31 to i64 ; [#uses=1] %P2 = getelementptr i16, i16* %row2col, i64 %sum13.cast %row2col.load.1.6 = load i16, i16* %P2, align 1 ; [#uses=1] %.ret = sub i16 %row2col.load.1.6, %row2col.load.1.2 ; [#uses=1] ret i16 %.ret }