derek.holloway
7502bf64a4
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74 lines
2.3 KiB
LLVM
74 lines
2.3 KiB
LLVM
; RUN: opt < %s -enable-loop-distribute -passes='loop-distribute,loop-mssa(simple-loop-unswitch<nontrivial>),loop-distribute' -o /dev/null -S -verify-analysis-invalidation=0 -debug-pass-manager=verbose 2>&1 | FileCheck %s
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; Running loop-distribute will result in LoopAccessAnalysis being required and
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; cached in the LoopAnalysisManagerFunctionProxy.
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;
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; CHECK: Running analysis: LoopAccessAnalysis on test6
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; Then simple-loop-unswitch is removing/replacing some loops (resulting in
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; Loop objects used as key in the analyses cache is destroyed). So here we
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; want to see that any analysis results cached on the destroyed loop is
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; cleared. A special case here is that loop_a_inner is destroyed when
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; unswitching the parent loop.
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;
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; The bug solved and verified by this test case was related to the
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; SimpleLoopUnswitch not marking the Loop as removed, so we missed clearing
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; the analysis caches.
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;
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; CHECK: Running pass: SimpleLoopUnswitchPass on loop %loop_begin in function test6
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; CHECK-NEXT: Clearing all analysis results for: loop_a_inner
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; When running loop-distribute the second time we can see that loop_a_inner
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; isn't analysed because the loop no longer exists (instead we find a new loop,
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; loop_a_inner.us). This kind of verifies that it was correct to remove the
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; loop_a_inner related analysis above.
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;
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; CHECK: Invalidating analysis: LoopAccessAnalysis on test6
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; CHECK-NEXT: Running pass: LoopDistributePass on test6
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; CHECK-NEXT: Running analysis: LoopAccessAnalysis on test6
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define i32 @test6(ptr %ptr, i1 %cond1, ptr %a.ptr, ptr %b.ptr) {
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entry:
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br label %loop_begin
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loop_begin:
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%v = load i1, ptr %ptr
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br i1 %cond1, label %loop_a, label %loop_b
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loop_a:
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br label %loop_a_inner
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loop_a_inner:
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%va = load i1, ptr %ptr
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%a = load i32, ptr %a.ptr
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br i1 %va, label %loop_a_inner, label %loop_a_inner_exit
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loop_a_inner_exit:
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%a.lcssa = phi i32 [ %a, %loop_a_inner ]
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br label %latch
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loop_b:
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br label %loop_b_inner
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loop_b_inner:
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%vb = load i1, ptr %ptr
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%b = load i32, ptr %b.ptr
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br i1 %vb, label %loop_b_inner, label %loop_b_inner_exit
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loop_b_inner_exit:
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%b.lcssa = phi i32 [ %b, %loop_b_inner ]
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br label %latch
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latch:
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%ab.phi = phi i32 [ %a.lcssa, %loop_a_inner_exit ], [ %b.lcssa, %loop_b_inner_exit ]
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br i1 %v, label %loop_begin, label %loop_exit
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loop_exit:
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%ab.lcssa = phi i32 [ %ab.phi, %latch ]
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ret i32 %ab.lcssa
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}
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