Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/Analysis/BasicAA/featuretest.ll

@@ -1,127 +0,0 @@
-; This testcase tests for various features the basicaa test should be able to 
-; determine, as noted in the comments.
-
-; RUN: opt < %s -basicaa -gvn -instcombine -dce -S | FileCheck %s
-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*)
-
-; 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) {
-	%Array1 = alloca i32, i32 100
-	%Array2 = alloca i32, i32 200
-        
-        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
-; CHECK: @different_array_test
-; CHECK: ret i32 0
-}
-
-; 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() {
-	%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
-; CHECK: @constant_array_index_test
-; CHECK: ret i32 0
-}
-
-; Test that if two pointers are spaced out by a constant getelementptr, that 
-; they cannot alias.
-define i32 @gep_distance_test(i32* %A) {
-        %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
-; CHECK: @gep_distance_test
-; CHECK: ret i32 0
-}
-
-; 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) {
-	%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
-; CHECK: @gep_distance_test2
-; CHECK: ret i32 0
-}
-
-; Test that we can do funny pointer things and that distance calc will still 
-; work.
-define i32 @gep_distance_test3(i32 * %A) {
-	%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
-; CHECK: @gep_distance_test3
-; CHECK: ret i32 0
-}
-
-; Test that we can disambiguate globals reached through constantexpr geps
-define i32 @constexpr_test() {
-   %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
-; CHECK: @constexpr_test
-; CHECK: ret i32 0
-}
-
-
-
-; PR7589
-; These two index expressions are different, this cannot be CSE'd.
-define i16 @zext_sext_confusion(i16* %row2col, i5 %j) nounwind{
-entry:
-  %sum5.cast = zext i5 %j to i64             ; <i64> [#uses=1]
-  %P1 = getelementptr i16, i16* %row2col, i64 %sum5.cast
-  %row2col.load.1.2 = load i16, i16* %P1, align 1 ; <i16> [#uses=1]
-  
-  %sum13.cast31 = sext i5 %j to i6          ; <i6> [#uses=1]
-  %sum13.cast = zext i6 %sum13.cast31 to i64      ; <i64> [#uses=1]
-  %P2 = getelementptr i16, i16* %row2col, i64 %sum13.cast
-  %row2col.load.1.6 = load i16, i16* %P2, align 1 ; <i16> [#uses=1]
-  
-  %.ret = sub i16 %row2col.load.1.6, %row2col.load.1.2 ; <i16> [#uses=1]
-  ret i16 %.ret
-; CHECK: @zext_sext_confusion
-; CHECK: ret i16 %.ret
-}