65c4d6191f
At the moment, the primary induction variable for the vector loop is
created as part of the skeleton creation. This is tied to creating the
vector loop latch outside of VPlan. This prevents from modeling the
*whole* vector loop in VPlan, which in turn is required to model
preheader and exit blocks in VPlan as well.
This patch introduces a new recipe VPCanonicalIVPHIRecipe to represent the
primary IV in VPlan and CanonicalIVIncrement{NUW} opcodes for
VPInstruction to model the increment.
This allows us to partly retire createInductionVariable. At the moment,
a bit of patching up is done after executing all blocks in the plan.
Reviewed By: Ayal
Differential Revision: https://reviews.llvm.org/D113223
46 lines
2.1 KiB
LLVM
46 lines
2.1 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\<{{.+}}\> = VF * UF +(nuw) vp\<[[CAN_IV]]\>\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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