157 lines
4.2 KiB
LLVM
157 lines
4.2 KiB
LLVM
; RUN: opt < %s -basic-aa -dse -S | FileCheck %s
|
|
|
|
declare noalias i8* @calloc(i64, i64)
|
|
|
|
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
|