derek.holloway
7502bf64a4
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81 lines
2.4 KiB
LLVM
81 lines
2.4 KiB
LLVM
; This test exercises that we don't corrupt a loop-analysis when running loop
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; unrolling in a way that deletes a loop. To do that, we first ensure the
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; analysis is cached, then unroll the loop (deleting it) and make sure that the
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; next function doesn't get a cache "hit" for this stale analysis result.
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;
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; RUN: opt -S -passes='require<access-info>,loop-unroll,print<access-info>' -debug-pass-manager < %s 2>&1 | FileCheck %s
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;
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; CHECK: Running pass: RequireAnalysisPass<{{.*}}LoopAccessAnalysis
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; CHECK: Running analysis: LoopAnalysis
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; CHECK: Running pass: LoopUnrollPass
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; CHECK: Invalidating analysis: LoopAccessAnalysis on test
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; CHECK: Running pass: LoopAccessInfoPrinterPass
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; CHECK: Running analysis: LoopAccessAnalysis on test
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; CHECK: Printing analysis 'Loop Access Analysis' for function 'test':
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; CHECK: inner1.header:
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; CHECK: inner1.header.1:
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target triple = "x86_64-unknown-linux-gnu"
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define void @test(i32 %inner1.count) {
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; CHECK-LABEL: define void @test(
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bb:
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br label %outer.ph
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outer.ph:
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br label %outer.header
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outer.header:
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%outer.i = phi i32 [ 0, %outer.ph ], [ %outer.i.next, %outer.latch ]
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br label %inner1.ph
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inner1.ph:
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br label %inner1.header
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inner1.header:
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%inner1.i = phi i32 [ 0, %inner1.ph ], [ %inner1.i.next, %inner1.header ]
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%inner1.i.next = add i32 %inner1.i, 1
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%inner1.cond = icmp eq i32 %inner1.i, %inner1.count
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br i1 %inner1.cond, label %inner1.exit, label %inner1.header
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; We should have two unrolled copies of this loop and nothing else.
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;
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; CHECK-NOT: icmp eq
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; CHECK-NOT: br i1
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; CHECK: %[[COND1:.*]] = icmp eq i32 %{{.*}}, %inner1.count
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; CHECK: br i1 %[[COND1]],
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; CHECK-NOT: icmp eq
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; CHECK-NOT: br i1
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; CHECK: %[[COND2:.*]] = icmp eq i32 %{{.*}}, %inner1.count
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; CHECK: br i1 %[[COND2]],
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; CHECK-NOT: icmp eq
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; CHECK-NOT: br i1
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inner1.exit:
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br label %inner2.ph
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inner2.ph:
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br label %inner2.header
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inner2.header:
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%inner2.i = phi i32 [ 0, %inner2.ph ], [ %inner2.i.next, %inner2.header ]
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%inner2.i.next = add i32 %inner2.i, 1
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%inner2.cond = icmp eq i32 %inner2.i, 4
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br i1 %inner2.cond, label %inner2.exit, label %inner2.header
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inner2.exit:
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br label %outer.latch
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outer.latch:
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%outer.i.next = add i32 %outer.i, 1
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%outer.cond = icmp eq i32 %outer.i.next, 2
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br i1 %outer.cond, label %outer.exit, label %outer.header
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outer.exit:
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br label %exit
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exit:
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ret void
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}
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