derek.holloway
7502bf64a4
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138 lines
3.8 KiB
LLVM
138 lines
3.8 KiB
LLVM
; RUN: opt -p simplifycfg -S %s | FileCheck %s
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declare void @init(ptr)
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define i64 @hoist_load_with_matching_pointers_and_tbaa(i1 %c) {
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; CHECK-LABEL: define i64 @hoist_load_with_matching_pointers_and_tbaa(
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; CHECK-SAME: i1 [[C:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[TMP:%.*]] = alloca i64, align 8
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; CHECK-NEXT: call void @init(ptr [[TMP]])
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; CHECK-NEXT: [[P:%.*]] = load i64, ptr [[TMP]], align 8, !tbaa [[TBAA0:![0-9]+]]
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; CHECK-NEXT: ret i64 [[P]]
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;
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entry:
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%tmp = alloca i64, align 8
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call void @init(ptr %tmp)
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br i1 %c, label %then, label %else
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then:
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%0 = load i64, ptr %tmp, align 8, !tbaa !0
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br label %exit
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else:
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%1 = load i64, ptr %tmp, align 8, !tbaa !0
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br label %exit
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exit:
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%p = phi i64 [ %0, %then ], [ %1, %else ]
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ret i64 %p
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}
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define i64 @hoist_load_with_matching_tbaa_different_pointers(i1 %c) {
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; CHECK-LABEL: define i64 @hoist_load_with_matching_tbaa_different_pointers(
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; CHECK-SAME: i1 [[C:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[TMP:%.*]] = alloca i64, align 8
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; CHECK-NEXT: [[TMP_1:%.*]] = alloca i64, align 8
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; CHECK-NEXT: call void @init(ptr [[TMP]])
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; CHECK-NEXT: call void @init(ptr [[TMP_1]])
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; CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr [[TMP]], align 8
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; CHECK-NOT: !tbaa
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; CHECK-NEXT: [[TMP1:%.*]] = load i64, ptr [[TMP_1]], align 8
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; CHECK-NOT: !tbaa
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; CHECK-NEXT: [[P:%.*]] = select i1 [[C]], i64 [[TMP0]], i64 [[TMP1]]
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; CHECK-NEXT: ret i64 [[P]]
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;
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entry:
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%tmp = alloca i64, align 8
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%tmp.1 = alloca i64, align 8
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call void @init(ptr %tmp)
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call void @init(ptr %tmp.1)
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br i1 %c, label %then, label %else
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then:
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%0 = load i64, ptr %tmp, align 8, !tbaa !0
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br label %exit
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else:
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%1 = load i64, ptr %tmp.1, align 8, !tbaa !0
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br label %exit
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exit:
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%p = phi i64 [ %0, %then ], [ %1, %else ]
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ret i64 %p
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}
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define i64 @hoist_load_with_different_tbaa(i1 %c) {
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; CHECK-LABEL: define i64 @hoist_load_with_different_tbaa(
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; CHECK-SAME: i1 [[C:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[TMP:%.*]] = alloca i64, align 8
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; CHECK-NEXT: call void @init(ptr [[TMP]])
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; CHECK-NEXT: [[P:%.*]] = load i64, ptr [[TMP]], align 8, !tbaa [[TBAA5:![0-9]+]]
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; CHECK-NEXT: ret i64 [[P]]
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;
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entry:
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%tmp = alloca i64, align 8
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call void @init(ptr %tmp)
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br i1 %c, label %then, label %else
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then:
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%0 = load i64, ptr %tmp, align 8, !tbaa !0
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br label %exit
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else:
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%1 = load i64, ptr %tmp, align 8, !tbaa !5
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br label %exit
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exit:
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%p = phi i64 [ %0, %then ], [ %1, %else ]
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ret i64 %p
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}
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define i64 @hoist_different_ops(i1 %c, i64 %a) {
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; CHECK-LABEL: define i64 @hoist_different_ops(
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; CHECK-SAME: i1 [[C:%.*]], i64 [[A:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[TMP:%.*]] = alloca i64, align 8
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; CHECK-NEXT: call void @init(ptr [[TMP]])
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; CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr [[TMP]], align 8
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; CHECK-NOT: !tbaa
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; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[A]], 123
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; CHECK-NEXT: [[P:%.*]] = select i1 [[C]], i64 [[TMP0]], i64 [[TMP1]]
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; CHECK-NEXT: ret i64 [[P]]
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;
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entry:
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%tmp = alloca i64, align 8
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call void @init(ptr %tmp)
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br i1 %c, label %then, label %else
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then:
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%0 = load i64, ptr %tmp, align 8, !tbaa !0
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br label %exit
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else:
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%1 = add i64 %a, 123
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br label %exit
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exit:
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%p = phi i64 [ %0, %then ], [ %1, %else ]
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ret i64 %p
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}
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!0 = !{!1, !1, i64 0}
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!1 = !{!"p2 long long", !2, i64 0}
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!2 = !{!"any pointer", !3, i64 0}
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!3 = !{!"omnipotent char", !4, i64 0}
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!4 = !{!"Simple C++ TBAA"}
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!5 = !{!3, !3, i64 0}
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;.
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; CHECK: [[TBAA0]] = !{[[META1:![0-9]+]], [[META1]], i64 0}
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; CHECK: [[META1]] = !{!"p2 long long", [[META2:![0-9]+]], i64 0}
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; CHECK: [[META2]] = !{!"any pointer", [[META3:![0-9]+]], i64 0}
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; CHECK: [[META3]] = !{!"omnipotent char", [[META4:![0-9]+]], i64 0}
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; CHECK: [[META4]] = !{!"Simple C++ TBAA"}
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; CHECK: [[TBAA5]] = !{[[META3]], [[META3]], i64 0}
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;.
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