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; RUN: opt -p simplifycfg -S %s | FileCheck %s
declare void @init(ptr)
define i64 @hoist_load_with_matching_pointers_and_tbaa(i1 %c) {
; CHECK-LABEL: define i64 @hoist_load_with_matching_pointers_and_tbaa(
; CHECK-SAME: i1 [[C:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: [[TMP:%.*]] = alloca i64, align 8
; CHECK-NEXT: call void @init(ptr [[TMP]])
; CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr [[TMP]], align 8
; CHECK-NOT: !tbaa
; CHECK-NEXT: [[TMP1:%.*]] = load i64, ptr [[TMP]], align 8
; CHECK-NOT: !tbaa
; CHECK-NEXT: [[P:%.*]] = select i1 [[C]], i64 [[TMP0]], i64 [[TMP1]]
; CHECK-NEXT: ret i64 [[P]]
;
entry:
%tmp = alloca i64, align 8
call void @init(ptr %tmp)
br i1 %c, label %then, label %else
then:
%0 = load i64, ptr %tmp, align 8, !tbaa !0
br label %exit
else:
%1 = load i64, ptr %tmp, align 8, !tbaa !0
br label %exit
exit:
%p = phi i64 [ %0, %then ], [ %1, %else ]
ret i64 %p
}
define i64 @hoist_load_with_matching_tbaa_different_pointers(i1 %c) {
; CHECK-LABEL: define i64 @hoist_load_with_matching_tbaa_different_pointers(
; CHECK-SAME: i1 [[C:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: [[TMP:%.*]] = alloca i64, align 8
; CHECK-NEXT: [[TMP_1:%.*]] = alloca i64, align 8
; CHECK-NEXT: call void @init(ptr [[TMP]])
; CHECK-NEXT: call void @init(ptr [[TMP_1]])
; CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr [[TMP]], align 8
; CHECK-NOT: !tbaa
; CHECK-NEXT: [[TMP1:%.*]] = load i64, ptr [[TMP_1]], align 8
; CHECK-NOT: !tbaa
; CHECK-NEXT: [[P:%.*]] = select i1 [[C]], i64 [[TMP0]], i64 [[TMP1]]
; CHECK-NEXT: ret i64 [[P]]
;
entry:
%tmp = alloca i64, align 8
%tmp.1 = alloca i64, align 8
call void @init(ptr %tmp)
call void @init(ptr %tmp.1)
br i1 %c, label %then, label %else
then:
%0 = load i64, ptr %tmp, align 8, !tbaa !0
br label %exit
else:
%1 = load i64, ptr %tmp.1, align 8, !tbaa !0
br label %exit
exit:
%p = phi i64 [ %0, %then ], [ %1, %else ]
ret i64 %p
}
define i64 @hoist_load_with_different_tbaa(i1 %c) {
; CHECK-LABEL: define i64 @hoist_load_with_different_tbaa(
; CHECK-SAME: i1 [[C:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: [[TMP:%.*]] = alloca i64, align 8
; CHECK-NEXT: call void @init(ptr [[TMP]])
; CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr [[TMP]], align 8
; CHECK-NOT: !tbaa
; CHECK-NEXT: [[TMP1:%.*]] = load i64, ptr [[TMP]], align 8
; CHECK-NOT: !tbaa
; CHECK-NEXT: [[P:%.*]] = select i1 [[C]], i64 [[TMP0]], i64 [[TMP1]]
; CHECK-NEXT: ret i64 [[P]]
;
entry:
%tmp = alloca i64, align 8
call void @init(ptr %tmp)
br i1 %c, label %then, label %else
then:
%0 = load i64, ptr %tmp, align 8, !tbaa !0
br label %exit
else:
%1 = load i64, ptr %tmp, align 8, !tbaa !5
br label %exit
exit:
%p = phi i64 [ %0, %then ], [ %1, %else ]
ret i64 %p
}
define i64 @hoist_different_ops(i1 %c, i64 %a) {
; CHECK-LABEL: define i64 @hoist_different_ops(
; CHECK-SAME: i1 [[C:%.*]], i64 [[A:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: [[TMP:%.*]] = alloca i64, align 8
; CHECK-NEXT: call void @init(ptr [[TMP]])
; CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr [[TMP]], align 8
; CHECK-NOT: !tbaa
; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[A]], 123
; CHECK-NEXT: [[P:%.*]] = select i1 [[C]], i64 [[TMP0]], i64 [[TMP1]]
; CHECK-NEXT: ret i64 [[P]]
;
entry:
%tmp = alloca i64, align 8
call void @init(ptr %tmp)
br i1 %c, label %then, label %else
then:
%0 = load i64, ptr %tmp, align 8, !tbaa !0
br label %exit
else:
%1 = add i64 %a, 123
br label %exit
exit:
%p = phi i64 [ %0, %then ], [ %1, %else ]
ret i64 %p
}
!0 = !{!1, !1, i64 0}
!1 = !{!"p2 long long", !2, i64 0}
!2 = !{!"any pointer", !3, i64 0}
!3 = !{!"omnipotent char", !4, i64 0}
!4 = !{!"Simple C++ TBAA"}
!5 = !{!3, !3, i64 0}
|
