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3430c6a131
The commit of r205855:
Author: Arnold Schwaighofer <aschwaighofer@apple.com>
Date: Wed Apr 9 14:20:47 2014 +0000
SLPVectorizer: Only vectorize intrinsics whose operands are widened equally
The vectorizer only knows how to vectorize intrinics by widening all operands by
the same factor.
Patch by Tyler Nowicki!
exposed a backend bug causing a regression (Cannot select ctpop).
The commit msg is a bit confusing because the patch actually changes the
behavior for the loop-vectorizer as well. As things got refactored into a
helper ctpop got snuck in to the trivially-vectorizable helper which is now
used by both vectorizers. In other words, we started seeing vector-ctpops in
the backend.
This change makes ctpop LegalizeAction::Expand for the types not supported by
the byte-only CNT instruction. We may be able to custom-lower these later to
a single CNT but this is to fix the compiler crash first.
Fixes <rdar://problem/16578951>
llvm-svn: 206433
69 lines
1.9 KiB
LLVM
69 lines
1.9 KiB
LLVM
; RUN: llc < %s -march=arm64 -mcpu=cyclone | FileCheck %s
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target triple = "arm64-apple-ios"
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; The non-byte ones used to fail with "Cannot select"
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; CHECK-LABEL: ctpopv8i8
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; CHECK: cnt.8b
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define <8 x i8> @ctpopv8i8(<8 x i8> %x) nounwind readnone {
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%cnt = tail call <8 x i8> @llvm.ctpop.v8i8(<8 x i8> %x)
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ret <8 x i8> %cnt
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}
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declare <8 x i8> @llvm.ctpop.v8i8(<8 x i8>) nounwind readnone
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; CHECK-LABEL: ctpopv4i16
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; CHECK: cnt.8b
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define <4 x i16> @ctpopv4i16(<4 x i16> %x) nounwind readnone {
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%cnt = tail call <4 x i16> @llvm.ctpop.v4i16(<4 x i16> %x)
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ret <4 x i16> %cnt
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}
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declare <4 x i16> @llvm.ctpop.v4i16(<4 x i16>) nounwind readnone
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; CHECK-LABEL: ctpopv2i32
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; CHECK: cnt.8b
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define <2 x i32> @ctpopv2i32(<2 x i32> %x) nounwind readnone {
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%cnt = tail call <2 x i32> @llvm.ctpop.v2i32(<2 x i32> %x)
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ret <2 x i32> %cnt
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}
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declare <2 x i32> @llvm.ctpop.v2i32(<2 x i32>) nounwind readnone
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; CHECK-LABEL: ctpopv16i8
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; CHECK: cnt.16b
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define <16 x i8> @ctpopv16i8(<16 x i8> %x) nounwind readnone {
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%cnt = tail call <16 x i8> @llvm.ctpop.v16i8(<16 x i8> %x)
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ret <16 x i8> %cnt
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}
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declare <16 x i8> @llvm.ctpop.v16i8(<16 x i8>) nounwind readnone
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; CHECK-LABEL: ctpopv8i16
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; CHECK: cnt.8b
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define <8 x i16> @ctpopv8i16(<8 x i16> %x) nounwind readnone {
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%cnt = tail call <8 x i16> @llvm.ctpop.v8i16(<8 x i16> %x)
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ret <8 x i16> %cnt
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}
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declare <8 x i16> @llvm.ctpop.v8i16(<8 x i16>) nounwind readnone
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; CHECK-LABEL: ctpopv4i32
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; CHECK: cnt.8b
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define <4 x i32> @ctpopv4i32(<4 x i32> %x) nounwind readnone {
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%cnt = tail call <4 x i32> @llvm.ctpop.v4i32(<4 x i32> %x)
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ret <4 x i32> %cnt
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}
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declare <4 x i32> @llvm.ctpop.v4i32(<4 x i32>) nounwind readnone
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; CHECK-LABEL: ctpopv2i64
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; CHECK: cnt.8b
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define <2 x i64> @ctpopv2i64(<2 x i64> %x) nounwind readnone {
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%cnt = tail call <2 x i64> @llvm.ctpop.v2i64(<2 x i64> %x)
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ret <2 x i64> %cnt
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}
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declare <2 x i64> @llvm.ctpop.v2i64(<2 x i64>) nounwind readnone
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