152 lines
3.9 KiB
LLVM
152 lines
3.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals --version 2
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; RUN: opt -passes=instcombine -S < %s | FileCheck %s
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target datalayout = "e-m:e-p:64:64:64-i64:64-f80:128-n8:16:32:64-S128"
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; Check that nonnull metadata is not propagated from dominating load.
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define void @combine_metadata_dominance1(ptr %p) {
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; CHECK-LABEL: define void @combine_metadata_dominance1
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; CHECK-SAME: (ptr [[P:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[BB1:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[A:%.*]] = load ptr, ptr [[P]], align 8
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; CHECK-NEXT: store i32 0, ptr [[A]], align 4
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; CHECK-NEXT: ret void
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;
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entry:
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%a = load ptr, ptr %p, !nonnull !0
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br label %bb1
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bb1:
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%b = load ptr, ptr %p
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store i32 0, ptr %a
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store i32 0, ptr %b
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ret void
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}
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declare i32 @use(ptr, i32) readonly
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; Check that nonnull from the dominated load does not get propagated.
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; There are some cases where it would be safe to keep it.
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define void @combine_metadata_dominance2(ptr %p, i1 %c1) {
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; CHECK-LABEL: define void @combine_metadata_dominance2
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; CHECK-SAME: (ptr [[P:%.*]], i1 [[C1:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[C1]], label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[A:%.*]] = load ptr, ptr [[P]], align 8
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; CHECK-NEXT: store i32 0, ptr [[A]], align 4
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; CHECK-NEXT: ret void
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; CHECK: bb2:
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; CHECK-NEXT: ret void
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;
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entry:
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%a = load ptr, ptr %p
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br i1 %c1, label %bb1, label %bb2
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bb1:
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%b = load ptr, ptr %p, !nonnull !0
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store i32 0, ptr %a
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store i32 0, ptr %b
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ret void
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bb2:
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ret void
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}
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define void @combine_metadata_dominance3(ptr %p) {
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; CHECK-LABEL: define void @combine_metadata_dominance3
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; CHECK-SAME: (ptr [[P:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[BB1:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[A:%.*]] = load ptr, ptr [[P]], align 8, !nonnull !0, !noundef !0
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; CHECK-NEXT: store i32 0, ptr [[A]], align 4
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; CHECK-NEXT: ret void
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;
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entry:
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%a = load ptr, ptr %p, !nonnull !0, !noundef !1
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br label %bb1
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bb1:
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%b = load ptr, ptr %p
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store i32 0, ptr %a
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store i32 0, ptr %b
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ret void
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}
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define void @combine_metadata_dominance4(ptr %p) {
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; CHECK-LABEL: define void @combine_metadata_dominance4
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; CHECK-SAME: (ptr [[P:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[BB1:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[A:%.*]] = load ptr, ptr [[P]], align 8
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; CHECK-NEXT: store i32 0, ptr [[A]], align 4
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; CHECK-NEXT: ret void
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;
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entry:
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%a = load ptr, ptr %p, !nonnull !0
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br label %bb1
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bb1:
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%b = load ptr, ptr %p, !noundef !1
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store i32 0, ptr %a
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store i32 0, ptr %b
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ret void
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}
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define void @combine_metadata_dominance5(ptr %p) {
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; CHECK-LABEL: define void @combine_metadata_dominance5
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; CHECK-SAME: (ptr [[P:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[BB1:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[A:%.*]] = load ptr, ptr [[P]], align 8, !align !1
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; CHECK-NEXT: store i32 0, ptr [[A]], align 4
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; CHECK-NEXT: ret void
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;
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entry:
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%a = load ptr, ptr %p, !align !2
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br label %bb1
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bb1:
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%b = load ptr, ptr %p, !align !3
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store i32 0, ptr %a
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store i32 0, ptr %b
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ret void
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}
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define void @combine_metadata_dominance6(ptr %p) {
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; CHECK-LABEL: define void @combine_metadata_dominance6
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; CHECK-SAME: (ptr [[P:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[BB1:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[A:%.*]] = load ptr, ptr [[P]], align 8, !align !2, !noundef !0
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; CHECK-NEXT: store i32 0, ptr [[A]], align 4
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; CHECK-NEXT: ret void
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;
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entry:
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%a = load ptr, ptr %p, !align !2, !noundef !1
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br label %bb1
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bb1:
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%b = load ptr, ptr %p, !align !3
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store i32 0, ptr %a
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store i32 0, ptr %b
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ret void
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}
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!0 = !{}
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!1 = !{}
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!2 = !{i64 8}
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!3 = !{i64 4}
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;.
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; CHECK: attributes #[[ATTR0:[0-9]+]] = { memory(read) }
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;.
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; CHECK: [[META0:![0-9]+]] = !{}
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; CHECK: [[META1:![0-9]+]] = !{i64 4}
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; CHECK: [[META2:![0-9]+]] = !{i64 8}
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;.
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