d4a8fc3a87
This patch adds a new BranchOnCount VPInstruction opcode with 2 operands. It first compares its 2 operands (increment of canonical induction and vector trip count), followed by a branch to either the exit block or back to the vector header. It must be the last recipe in the exit block of the topmost vector loop region. This extracts parts from D113224 and was discussed in D113223. Reviewed By: Ayal Differential Revision: https://reviews.llvm.org/D116479
47 lines
2.2 KiB
LLVM
47 lines
2.2 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt -loop-vectorize -debug-only=loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -vplan-print-in-dot-format -disable-output %s 2>&1 | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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; Verify that -vplan-print-in-dot-format option works.
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define void @print_call_and_memory(i64 %n, float* noalias %y, float* noalias %x) nounwind uwtable {
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; CHECK: subgraph cluster_N0 {
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; CHECK-NEXT: fontname=Courier
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; CHECK-NEXT: label="\<x1\> vector loop"
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; CHECK-NEXT: N1 [label =
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; CHECK-NEXT: "for.body:\l" +
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; CHECK-NEXT: " EMIT vp\<[[CAN_IV:%.+]]\> = CANONICAL-INDUCTION\l" +
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; CHECK-NEXT: " WIDEN-INDUCTION %iv = phi %iv.next, 0\l" +
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; CHECK-NEXT: " CLONE ir\<%arrayidx\> = getelementptr ir\<%y\>, ir\<%iv\>\l" +
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; CHECK-NEXT: " WIDEN ir\<%lv\> = load ir\<%arrayidx\>\l" +
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; CHECK-NEXT: " WIDEN-CALL ir\<%call\> = call @llvm.sqrt.f32(ir\<%lv\>)\l" +
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; CHECK-NEXT: " CLONE ir\<%arrayidx2\> = getelementptr ir\<%x\>, ir\<%iv\>\l" +
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; CHECK-NEXT: " WIDEN store ir\<%arrayidx2\>, ir\<%call\>\l" +
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; CHECK-NEXT: " EMIT vp\<[[CAN_IV_NEXT:%.+]]\> = VF * UF +(nuw) vp\<[[CAN_IV]]\>\l" +
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; CHECK-NEXT: " EMIT branch-on-count vp\<[[CAN_IV_NEXT]]\> vp\<{{.+}}\>\l" +
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; CHECK-NEXT: "No successors\l"
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; CHECK-NEXT: ]
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;
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entry:
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%cmp6 = icmp sgt i64 %n, 0
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br i1 %cmp6, label %for.body, label %for.end
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for.body: ; preds = %entry, %for.body
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%iv = phi i64 [ %iv.next, %for.body ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds float, float* %y, i64 %iv
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%lv = load float, float* %arrayidx, align 4
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%call = tail call float @llvm.sqrt.f32(float %lv) nounwind readnone
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%arrayidx2 = getelementptr inbounds float, float* %x, i64 %iv
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store float %call, float* %arrayidx2, align 4
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%iv.next = add i64 %iv, 1
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%exitcond = icmp eq i64 %iv.next, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body, %entry
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ret void
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}
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declare float @llvm.sqrt.f32(float) nounwind readnone
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