derek.holloway
7502bf64a4
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73 lines
2.1 KiB
LLVM
73 lines
2.1 KiB
LLVM
; This test checks that nested loops are revisited in various scenarios when
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; unrolling. Note that if we ever start doing outer loop peeling a test case
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; for that should be added here.
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;
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; RUN: opt < %s -disable-output -debug-pass-manager 2>&1 \
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; RUN: -passes='require<opt-remark-emit>,loop(loop-unroll-full)' \
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; RUN: | FileCheck %s
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;
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; Basic test is fully unrolled and we revisit the post-unroll new sibling
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; loops, including the ones that used to be child loops.
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define void @full_unroll(ptr %ptr) {
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; CHECK-LABEL: OptimizationRemarkEmitterAnalysis on full_unroll
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; CHECK-NOT: LoopFullUnrollPass
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entry:
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br label %l0
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l0:
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%cond.0 = load volatile i1, ptr %ptr
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br i1 %cond.0, label %l0.0.ph, label %exit
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l0.0.ph:
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br label %l0.0
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l0.0:
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%iv = phi i32 [ %iv.next, %l0.0.latch ], [ 0, %l0.0.ph ]
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%iv.next = add i32 %iv, 1
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br label %l0.0.0.ph
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l0.0.0.ph:
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br label %l0.0.0
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l0.0.0:
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%cond.0.0.0 = load volatile i1, ptr %ptr
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br i1 %cond.0.0.0, label %l0.0.0, label %l0.0.1.ph
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; CHECK: LoopFullUnrollPass on loop %l0.0.0
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; CHECK-NOT: LoopFullUnrollPass
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l0.0.1.ph:
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br label %l0.0.1
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l0.0.1:
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%cond.0.0.1 = load volatile i1, ptr %ptr
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br i1 %cond.0.0.1, label %l0.0.1, label %l0.0.latch
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; CHECK: LoopFullUnrollPass on loop %l0.0.1 in function full_unroll
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; CHECK-NOT: LoopFullUnrollPass
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l0.0.latch:
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%cmp = icmp slt i32 %iv.next, 2
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br i1 %cmp, label %l0.0, label %l0.latch
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; CHECK: LoopFullUnrollPass on loop %l0.0 in function full_unroll
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; CHECK-NOT: LoopFullUnrollPass
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;
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; Unrolling occurs, so we visit what were the inner loops twice over. First we
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; visit their clones, and then we visit the original loops re-parented.
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; CHECK: LoopFullUnrollPass on loop %l0.0.1.1 in function full_unroll
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; CHECK-NOT: LoopFullUnrollPass
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; CHECK: LoopFullUnrollPass on loop %l0.0.0.1 in function full_unroll
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; CHECK-NOT: LoopFullUnrollPass
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; CHECK: LoopFullUnrollPass on loop %l0.0.1 in function full_unroll
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; CHECK-NOT: LoopFullUnrollPass
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; CHECK: LoopFullUnrollPass on loop %l0.0.0 in function full_unroll
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; CHECK-NOT: LoopFullUnrollPass
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l0.latch:
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br label %l0
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; CHECK: LoopFullUnrollPass on loop %l0 in function full_unroll
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; CHECK-NOT: LoopFullUnrollPass
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exit:
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ret void
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}
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