derek.holloway
7502bf64a4
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60 lines
2.1 KiB
LLVM
60 lines
2.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -loop-reduce < %s | FileCheck %s
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; Test an assertion failure from D113349, where the SCEV for the outer phi
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; gets computed and registered in the value map while attempting to compute it.
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define void @test() {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
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; CHECK: loop.header:
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; CHECK-NEXT: [[LSR_IV:%.*]] = phi ptr [ [[SCEVGEP:%.*]], [[LOOP_LATCH:%.*]] ], [ inttoptr (i64 -8 to ptr), [[ENTRY:%.*]] ]
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; CHECK-NEXT: br i1 true, label [[LOOP_EXIT:%.*]], label [[LOOP2_PREHEADER:%.*]]
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; CHECK: loop.exit:
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; CHECK-NEXT: ret void
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; CHECK: loop2.preheader:
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; CHECK-NEXT: br label [[LOOP2_HEADER:%.*]]
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; CHECK: loop2.header:
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; CHECK-NEXT: [[LSR_IV1:%.*]] = phi ptr [ [[SCEVGEP2:%.*]], [[LOOP2_HEADER]] ], [ [[LSR_IV]], [[LOOP2_PREHEADER]] ]
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; CHECK-NEXT: [[SCEVGEP2]] = getelementptr i8, ptr [[LSR_IV1]], i64 8
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; CHECK-NEXT: br i1 false, label [[LOOP2_HEADER]], label [[LOOP2_CONT:%.*]]
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; CHECK: loop2.cont:
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; CHECK-NEXT: [[V:%.*]] = load i8, ptr [[SCEVGEP2]], align 1
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; CHECK-NEXT: [[C:%.*]] = icmp ne i8 [[V]], 0
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; CHECK-NEXT: br i1 [[C]], label [[LOOP_EXIT]], label [[LOOP_LATCH]]
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; CHECK: loop.latch:
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; CHECK-NEXT: [[SCEVGEP]] = getelementptr i8, ptr [[LSR_IV]], i64 8
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; CHECK-NEXT: br label [[LOOP_HEADER]]
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;
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entry:
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br label %loop.header
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loop.header:
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%ptr = phi ptr [ %ptr.next, %loop.latch ], [ null, %entry ]
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br i1 true, label %loop.exit, label %loop2.preheader
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loop.exit:
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ret void
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loop2.preheader:
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br label %loop2.header
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loop2.header:
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%ptr2 = phi ptr [ %ptr, %loop2.preheader ], [ %ptr2.next, %loop2.header ]
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%ptr2.next = getelementptr inbounds i64, ptr %ptr2, i64 1
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br i1 false, label %loop2.header, label %loop2.cont
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loop2.cont:
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%v = load i8, ptr %ptr2
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%c = icmp ne i8 %v, 0
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br i1 %c, label %loop.exit, label %loop.latch
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loop.latch:
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%ptr.next = getelementptr inbounds i64, ptr %ptr, i64 1
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br label %loop.header
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}
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