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https://github.com/RPCS3/llvm-mirror.git
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982327f66d
This patch makes SLP and LV emit operations with initial vectors set to poison constant instead of undef. This is a part of efforts for using poison vector instead of undef to represent "doesn't care" vector. The goal is to make nice shufflevector optimizations valid that is currently incorrect due to the tricky interaction between undef and poison (see https://bugs.llvm.org/show_bug.cgi?id=44185 ). Reviewed By: fhahn Differential Revision: https://reviews.llvm.org/D94061
99 lines
4.7 KiB
LLVM
99 lines
4.7 KiB
LLVM
; RUN: opt -S -loop-vectorize -force-vector-width=4 -force-vector-interleave=1 < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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; PR39417
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; Check that the need for overflow check prevents vectorizing a loop with tiny
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; trip count (which implies opt for size).
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; CHECK-LABEL: @func_34
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; CHECK-NOT: vector.scevcheck
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; CHECK-NOT: vector.body:
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; CHECK-LABEL: bb67:
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define void @func_34() {
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bb1:
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br label %bb67
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bb67:
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%storemerge2 = phi i32 [ 0, %bb1 ], [ %_tmp2300, %bb67 ]
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%sext = shl i32 %storemerge2, 16
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%_tmp2299 = ashr exact i32 %sext, 16
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%_tmp2300 = add nsw i32 %_tmp2299, 1
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%_tmp2310 = trunc i32 %_tmp2300 to i16
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%_tmp2312 = icmp slt i16 %_tmp2310, 3
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br i1 %_tmp2312, label %bb67, label %bb68
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bb68:
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ret void
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}
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; Check that a loop under opt-for-size is vectorized, w/o checking for
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; stride==1.
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; NOTE: Some assertions have been autogenerated by utils/update_test_checks.py
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define void @scev4stride1(i32* noalias nocapture %a, i32* noalias nocapture readonly %b, i32 %k) #0 {
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; CHECK-LABEL: @scev4stride1(
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; CHECK-NEXT: for.body.preheader:
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; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
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; CHECK: vector.ph:
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; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i32> poison, i32 [[K:%.*]], i32 0
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; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i32> [[BROADCAST_SPLATINSERT]], <4 x i32> poison, <4 x i32> zeroinitializer
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; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
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; CHECK: vector.body:
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; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
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; CHECK-NEXT: [[VEC_IND:%.*]] = phi <4 x i32> [ <i32 0, i32 1, i32 2, i32 3>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[INDEX]], 0
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; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[INDEX]], 1
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; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[INDEX]], 2
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; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[INDEX]], 3
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; CHECK-NEXT: [[TMP4:%.*]] = mul nsw <4 x i32> [[VEC_IND]], [[BROADCAST_SPLAT]]
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; CHECK-NEXT: [[TMP5:%.*]] = extractelement <4 x i32> [[TMP4]], i32 0
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; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i32, i32* [[B:%.*]], i32 [[TMP5]]
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; CHECK-NEXT: [[TMP7:%.*]] = extractelement <4 x i32> [[TMP4]], i32 1
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; CHECK-NEXT: [[TMP8:%.*]] = getelementptr inbounds i32, i32* [[B]], i32 [[TMP7]]
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; CHECK-NEXT: [[TMP9:%.*]] = extractelement <4 x i32> [[TMP4]], i32 2
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; CHECK-NEXT: [[TMP10:%.*]] = getelementptr inbounds i32, i32* [[B]], i32 [[TMP9]]
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; CHECK-NEXT: [[TMP11:%.*]] = extractelement <4 x i32> [[TMP4]], i32 3
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; CHECK-NEXT: [[TMP12:%.*]] = getelementptr inbounds i32, i32* [[B]], i32 [[TMP11]]
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; CHECK-NEXT: [[TMP13:%.*]] = load i32, i32* [[TMP6]], align 4
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; CHECK-NEXT: [[TMP14:%.*]] = load i32, i32* [[TMP8]], align 4
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; CHECK-NEXT: [[TMP15:%.*]] = load i32, i32* [[TMP10]], align 4
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; CHECK-NEXT: [[TMP16:%.*]] = load i32, i32* [[TMP12]], align 4
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; CHECK-NEXT: [[TMP17:%.*]] = insertelement <4 x i32> poison, i32 [[TMP13]], i32 0
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; CHECK-NEXT: [[TMP18:%.*]] = insertelement <4 x i32> [[TMP17]], i32 [[TMP14]], i32 1
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; CHECK-NEXT: [[TMP19:%.*]] = insertelement <4 x i32> [[TMP18]], i32 [[TMP15]], i32 2
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; CHECK-NEXT: [[TMP20:%.*]] = insertelement <4 x i32> [[TMP19]], i32 [[TMP16]], i32 3
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; CHECK-NEXT: [[TMP21:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[TMP0]]
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; CHECK-NEXT: [[TMP22:%.*]] = getelementptr inbounds i32, i32* [[TMP21]], i32 0
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; CHECK-NEXT: [[TMP23:%.*]] = bitcast i32* [[TMP22]] to <4 x i32>*
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; CHECK-NEXT: store <4 x i32> [[TMP20]], <4 x i32>* [[TMP23]], align 4
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; CHECK-NEXT: [[INDEX_NEXT]] = add i32 [[INDEX]], 4
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; CHECK-NEXT: [[VEC_IND_NEXT]] = add <4 x i32> [[VEC_IND]], <i32 4, i32 4, i32 4, i32 4>
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; CHECK-NEXT: [[TMP24:%.*]] = icmp eq i32 [[INDEX_NEXT]], 1024
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; CHECK-NEXT: br i1 [[TMP24]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop !0
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; CHECK: middle.block:
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; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i32 1024, 1024
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; CHECK-NEXT: br i1 [[CMP_N]], label [[FOR_END_LOOPEXIT:%.*]], label [[SCALAR_PH]]
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; CHECK: scalar.ph:
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; CHECK: for.body:
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; CHECK: for.end.loopexit:
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; CHECK-NEXT: ret void
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;
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for.body.preheader:
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br label %for.body
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for.body:
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%i.07 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
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%mul = mul nsw i32 %i.07, %k
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%arrayidx = getelementptr inbounds i32, i32* %b, i32 %mul
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%0 = load i32, i32* %arrayidx, align 4
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%arrayidx1 = getelementptr inbounds i32, i32* %a, i32 %i.07
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store i32 %0, i32* %arrayidx1, align 4
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%inc = add nuw nsw i32 %i.07, 1
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%exitcond = icmp eq i32 %inc, 1024
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br i1 %exitcond, label %for.end.loopexit, label %for.body
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for.end.loopexit:
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ret void
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}
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attributes #0 = { optsize }
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