5e7e499b91
When cloning instructions during jump threading, also clone and adapt any declared scopes. This is primarily important when threading loop exits, because we'll end up with two dominating scope declarations in that case (at least after additional loop rotation). This addresses a loose thread from https://reviews.llvm.org/rG2556b413a7b8#975012. Differential Revision: https://reviews.llvm.org/D97154
64 lines
2.0 KiB
LLVM
64 lines
2.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -jump-threading < %s | FileCheck %s
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define void @test(i8* %ptr) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: call void @llvm.experimental.noalias.scope.decl(metadata !0)
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[I_INC:%.*]], [[LATCH:%.*]] ]
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; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[I]], 100
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; CHECK-NEXT: br i1 [[C]], label [[EXIT:%.*]], label [[LATCH]]
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; CHECK: latch:
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; CHECK-NEXT: call void @llvm.experimental.noalias.scope.decl(metadata !3)
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; CHECK-NEXT: store i8 0, i8* [[PTR:%.*]], align 1, !noalias !0
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; CHECK-NEXT: store i8 1, i8* [[PTR]], align 1, !noalias !3
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; CHECK-NEXT: [[I_INC]] = add i32 [[I]], 1
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; CHECK-NEXT: br label [[LOOP]]
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; CHECK: exit:
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; CHECK-NEXT: call void @llvm.experimental.noalias.scope.decl(metadata !5)
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; CHECK-NEXT: store i8 0, i8* [[PTR]], align 1, !noalias !0
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; CHECK-NEXT: store i8 1, i8* [[PTR]], align 1, !noalias !5
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; CHECK-NEXT: ret void
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;
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entry:
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call void @llvm.experimental.noalias.scope.decl(metadata !0)
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br label %loop
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loop:
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%i = phi i32 [ 0, %entry ], [ %i.inc, %latch ]
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%c = icmp eq i32 %i, 100
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br i1 %c, label %if, label %latch
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if:
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br label %latch
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latch:
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%p = phi i1 [ true, %if ], [ false, %loop ]
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call void @llvm.experimental.noalias.scope.decl(metadata !3)
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store i8 0, i8* %ptr, !noalias !0
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store i8 1, i8* %ptr, !noalias !3
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%i.inc = add i32 %i, 1
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br i1 %p, label %exit, label %loop
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exit:
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ret void
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}
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declare void @llvm.experimental.noalias.scope.decl(metadata)
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!0 = !{!1}
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!1 = distinct !{!1, !2, !"scope1"}
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!2 = distinct !{!2, !"domain"}
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!3 = !{!4}
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!4 = distinct !{!4, !2, !"scope2"}
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; CHECK: !0 = !{!1}
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; CHECK: !1 = distinct !{!1, !2, !"scope1"}
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; CHECK: !2 = distinct !{!2, !"domain"}
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; CHECK: !3 = !{!4}
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; CHECK: !4 = distinct !{!4, !2, !"scope2"}
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; CHECK: !5 = !{!6}
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; CHECK: !6 = distinct !{!6, !2, !"scope2:thread"}
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