776589a3b5
Noticed this when -vplan-print-after-all crashed on a find-last reduction. We don't yet return an opcode for it because there's no in-loop reduction.
92 lines
4.5 KiB
LLVM
92 lines
4.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 6
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; RUN: opt -disable-output %s -p loop-vectorize -force-vector-width=4 -vplan-print-after=optimizeFindIVReductions 2>&1 | FileCheck %s
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define i32 @find_last_with_select(ptr noalias %a, ptr noalias %b) {
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; CHECK-LABEL: VPlan for loop in 'find_last_with_select'
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; CHECK: VPlan ' for UF>=1' {
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; CHECK-NEXT: Live-in vp<[[VP0:%[0-9]+]]> = VF
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; CHECK-NEXT: Live-in vp<[[VP1:%[0-9]+]]> = VF * UF
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; CHECK-NEXT: Live-in vp<[[VP2:%[0-9]+]]> = vector-trip-count
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; CHECK-NEXT: Live-in ir<500> = original trip-count
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; CHECK-EMPTY:
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; CHECK-NEXT: ir-bb<entry>:
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; CHECK-NEXT: Successor(s): scalar.ph, vector.ph
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; CHECK-EMPTY:
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; CHECK-NEXT: vector.ph:
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; CHECK-NEXT: Successor(s): vector loop
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; CHECK-EMPTY:
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; CHECK-NEXT: <x1> vector loop: {
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; CHECK-NEXT: vector.body:
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; CHECK-NEXT: EMIT vp<[[VP3:%[0-9]+]]> = CANONICAL-INDUCTION ir<0>, vp<%index.next>
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; CHECK-NEXT: ir<%iv> = WIDEN-INDUCTION nuw nsw ir<0>, ir<1>, vp<[[VP0]]>
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; CHECK-NEXT: WIDEN-REDUCTION-PHI ir<%rdx> = phi ir<1>, ir<%sel>
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; CHECK-NEXT: CLONE ir<%gep.a> = getelementptr inbounds ir<%a>, ir<%iv>
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; CHECK-NEXT: vp<[[VP4:%[0-9]+]]> = vector-pointer inbounds ir<%gep.a>
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; CHECK-NEXT: WIDEN ir<%load.a> = load vp<[[VP4]]>
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; CHECK-NEXT: CLONE ir<%gep.b> = getelementptr inbounds ir<%b>, ir<%iv>
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; CHECK-NEXT: vp<[[VP5:%[0-9]+]]> = vector-pointer inbounds ir<%gep.b>
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; CHECK-NEXT: WIDEN ir<%load.b> = load vp<[[VP5]]>
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; CHECK-NEXT: WIDEN ir<%cmp> = icmp slt ir<%load.a>, ir<%load.b>
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; CHECK-NEXT: WIDEN ir<%sel> = select ir<%cmp>, ir<%rdx>, ir<%load.a>
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; CHECK-NEXT: CLONE ir<%iv.next> = add nuw nsw ir<%iv>, ir<1>
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; CHECK-NEXT: CLONE ir<%exitcond> = icmp eq ir<%iv.next>, ir<500>
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; CHECK-NEXT: EMIT vp<%index.next> = add nuw vp<[[VP3]]>, vp<[[VP1]]>
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; CHECK-NEXT: EMIT branch-on-count vp<%index.next>, vp<[[VP2]]>
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; CHECK-NEXT: No successors
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; CHECK-NEXT: }
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; CHECK-NEXT: Successor(s): middle.block
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; CHECK-EMPTY:
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; CHECK-NEXT: middle.block:
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; CHECK-NEXT: EMIT vp<[[VP7:%[0-9]+]]> = compute-reduction-result (find-last) ir<%sel>
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; CHECK-NEXT: EMIT vp<[[VP8:%[0-9]+]]> = exiting-iv-value ir<%iv>
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; CHECK-NEXT: EMIT vp<[[VP9:%[0-9]+]]> = extract-last-part vp<[[VP7]]>
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; CHECK-NEXT: EMIT vp<[[VP10:%[0-9]+]]> = extract-last-lane vp<[[VP9]]>
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; CHECK-NEXT: EMIT vp<[[VP11:%[0-9]+]]> = extract-last-part vp<[[VP7]]>
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; CHECK-NEXT: EMIT vp<[[VP12:%[0-9]+]]> = extract-last-lane vp<[[VP11]]>
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; CHECK-NEXT: EMIT vp<%cmp.n> = icmp eq ir<500>, vp<[[VP2]]>
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; CHECK-NEXT: EMIT branch-on-cond vp<%cmp.n>
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; CHECK-NEXT: Successor(s): ir-bb<exit>, scalar.ph
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; CHECK-EMPTY:
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; CHECK-NEXT: ir-bb<exit>:
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; CHECK-NEXT: IR %sel.lcssa = phi i32 [ %sel, %loop ] (extra operand: vp<[[VP7]]> from middle.block)
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; CHECK-NEXT: No successors
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; CHECK-EMPTY:
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; CHECK-NEXT: scalar.ph:
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; CHECK-NEXT: EMIT-SCALAR vp<%bc.resume.val> = phi [ vp<[[VP8]]>, middle.block ], [ ir<0>, ir-bb<entry> ]
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; CHECK-NEXT: EMIT-SCALAR vp<%bc.merge.rdx> = phi [ vp<[[VP7]]>, middle.block ], [ ir<1>, ir-bb<entry> ]
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; CHECK-NEXT: Successor(s): ir-bb<loop>
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; CHECK-EMPTY:
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; CHECK-NEXT: ir-bb<loop>:
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; CHECK-NEXT: IR %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ] (extra operand: vp<%bc.resume.val> from scalar.ph)
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; CHECK-NEXT: IR %rdx = phi i32 [ 1, %entry ], [ %sel, %loop ] (extra operand: vp<%bc.merge.rdx> from scalar.ph)
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; CHECK-NEXT: IR %gep.a = getelementptr inbounds i32, ptr %a, i64 %iv
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; CHECK-NEXT: IR %load.a = load i32, ptr %gep.a, align 4
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; CHECK-NEXT: IR %gep.b = getelementptr inbounds i32, ptr %b, i64 %iv
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; CHECK-NEXT: IR %load.b = load i32, ptr %gep.b, align 4
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; CHECK-NEXT: IR %cmp = icmp slt i32 %load.a, %load.b
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; CHECK-NEXT: IR %sel = select i1 %cmp, i32 %rdx, i32 %load.a
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; CHECK-NEXT: IR %iv.next = add nuw nsw i64 %iv, 1
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; CHECK-NEXT: IR %exitcond = icmp eq i64 %iv.next, 500
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; CHECK-NEXT: No successors
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; CHECK-NEXT: }
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;
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entry:
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br label %loop
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loop:
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%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
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%rdx = phi i32 [ 1, %entry ], [ %sel, %loop ]
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%gep.a = getelementptr inbounds i32, ptr %a, i64 %iv
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%load.a = load i32, ptr %gep.a, align 4
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%gep.b = getelementptr inbounds i32, ptr %b, i64 %iv
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%load.b = load i32, ptr %gep.b, align 4
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%cmp = icmp slt i32 %load.a, %load.b
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%sel = select i1 %cmp, i32 %rdx, i32 %load.a
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%iv.next = add nuw nsw i64 %iv, 1
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%exitcond = icmp eq i64 %iv.next, 500
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br i1 %exitcond, label %exit, label %loop
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exit:
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ret i32 %sel
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}
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