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; RUN: opt < %s -basic-aa -dse -S | FileCheck %s
declare noalias i8* @calloc(i64, i64) inaccessiblememonly
define i32* @test1() {
; CHECK-LABEL: test1
%1 = tail call noalias i8* @calloc(i64 1, i64 4)
%2 = bitcast i8* %1 to i32*
; This store is dead and should be removed
store i32 0, i32* %2, align 4
; CHECK-NOT: store i32 0, i32* %2, align 4
ret i32* %2
}
define i32* @test2() {
; CHECK-LABEL: test2
%1 = tail call noalias i8* @calloc(i64 1, i64 4)
%2 = bitcast i8* %1 to i32*
%3 = getelementptr i32, i32* %2, i32 5
store i32 0, i32* %3, align 4
; CHECK-NOT: store i32 0, i32* %2, align 4
ret i32* %2
}
define i32* @test3(i32 *%arg) {
; CHECK-LABEL: test3
store i32 0, i32* %arg, align 4
; CHECK: store i32 0, i32* %arg, align 4
ret i32* %arg
}
declare void @clobber_memory(i8*)
define i8* @test4() {
; CHECK-LABEL: test4
%1 = tail call noalias i8* @calloc(i64 1, i64 4)
call void @clobber_memory(i8* %1)
store i8 0, i8* %1, align 4
; CHECK: store i8 0, i8* %1, align 4
ret i8* %1
}
define i32* @test5() {
; CHECK-LABEL: test5
%1 = tail call noalias i8* @calloc(i64 1, i64 4)
%2 = bitcast i8* %1 to i32*
store volatile i32 0, i32* %2, align 4
; CHECK: store volatile i32 0, i32* %2, align 4
ret i32* %2
}
define i8* @test6() {
; CHECK-LABEL: test6
%1 = tail call noalias i8* @calloc(i64 1, i64 4)
store i8 5, i8* %1, align 4
; CHECK: store i8 5, i8* %1, align 4
ret i8* %1
}
define i8* @test7(i8 %arg) {
; CHECK-LABEL: test7
%1 = tail call noalias i8* @calloc(i64 1, i64 4)
store i8 %arg, i8* %1, align 4
; CHECK: store i8 %arg, i8* %1, align 4
ret i8* %1
}
define i8* @test8() {
; CHECK-LABEL: test8
; CHECK-NOT: store
%p = tail call noalias i8* @calloc(i64 1, i64 4)
store i8 0, i8* %p, align 1
%p.1 = getelementptr i8, i8* %p, i32 1
store i8 0, i8* %p.1, align 1
%p.3 = getelementptr i8, i8* %p, i32 3
store i8 0, i8* %p.3, align 1
%p.2 = getelementptr i8, i8* %p, i32 2
store i8 0, i8* %p.2, align 1
ret i8* %p
}
define i8* @test9() {
; CHECK-LABEL: test9
; CHECK-NEXT: %p = tail call noalias i8* @calloc(i64 1, i64 4)
; CHECK-NEXT: store i8 5, i8* %p, align 1
; CHECK-NEXT: ret i8* %p
%p = tail call noalias i8* @calloc(i64 1, i64 4)
store i8 5, i8* %p, align 1
%p.1 = getelementptr i8, i8* %p, i32 1
store i8 0, i8* %p.1, align 1
%p.3 = getelementptr i8, i8* %p, i32 3
store i8 0, i8* %p.3, align 1
%p.2 = getelementptr i8, i8* %p, i32 2
store i8 0, i8* %p.2, align 1
ret i8* %p
}
define i8* @test10() {
; CHECK-LABEL: @test10(
; CHECK-NEXT: [[P:%.*]] = tail call noalias i8* @calloc(i64 1, i64 4)
; CHECK-NEXT: [[P_3:%.*]] = getelementptr i8, i8* [[P]], i32 3
; CHECK-NEXT: store i8 5, i8* [[P_3]], align 1
; CHECK-NEXT: ret i8* [[P]]
;
%p = tail call noalias i8* @calloc(i64 1, i64 4)
store i8 0, i8* %p, align 1
%p.1 = getelementptr i8, i8* %p, i32 1
store i8 0, i8* %p.1, align 1
%p.3 = getelementptr i8, i8* %p, i32 3
store i8 5, i8* %p.3, align 1
%p.2 = getelementptr i8, i8* %p, i32 2
store i8 0, i8* %p.2, align 1
ret i8* %p
}
define i8* @test11() {
; CHECK-LABEL: @test11(
; CHECK-NEXT: [[P:%.*]] = tail call noalias i8* @calloc(i64 1, i64 4)
; CHECK-NEXT: ret i8* [[P]]
;
%p = tail call noalias i8* @calloc(i64 1, i64 4)
store i8 0, i8* %p, align 1
%p.1 = getelementptr i8, i8* %p, i32 1
store i8 0, i8* %p.1, align 1
%p.3 = getelementptr i8, i8* %p, i32 3
store i8 5, i8* %p.3, align 1
%p.2 = getelementptr i8, i8* %p, i32 2
store i8 0, i8* %p.2, align 1
%p.3.2 = getelementptr i8, i8* %p, i32 3
store i8 0, i8* %p.3.2, align 1
ret i8* %p
}
define i8* @test12() {
; CHECK-LABEL: @test12(
; CHECK-NEXT: [[P:%.*]] = tail call noalias i8* @calloc(i64 1, i64 4)
; CHECK-NEXT: [[P_3:%.*]] = getelementptr i8, i8* [[P]], i32 3
; CHECK-NEXT: store i8 5, i8* [[P_3]], align 1
; CHECK-NEXT: call void @use(i8* [[P]])
; CHECK-NEXT: [[P_3_2:%.*]] = getelementptr i8, i8* [[P]], i32 3
; CHECK-NEXT: store i8 0, i8* [[P_3_2]], align 1
; CHECK-NEXT: ret i8* [[P]]
;
%p = tail call noalias i8* @calloc(i64 1, i64 4)
%p.3 = getelementptr i8, i8* %p, i32 3
store i8 5, i8* %p.3, align 1
call void @use(i8* %p)
%p.3.2 = getelementptr i8, i8* %p, i32 3
store i8 0, i8* %p.3.2, align 1
ret i8* %p
}
declare void @use(i8*) readonly
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