4a8e6ed2f7
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
81 lines
4.3 KiB
LLVM
81 lines
4.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -slp-vectorizer -S -mtriple=x86_64-unknown-linux-gnu -mcpu=bdver2 < %s | FileCheck %s
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; Function Attrs: nounwind uwtable
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define void @get_block(i32 %y_pos) local_unnamed_addr #0 {
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; CHECK-LABEL: @get_block(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LAND_LHS_TRUE:%.*]]
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; CHECK: land.lhs.true:
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; CHECK-NEXT: br i1 undef, label [[IF_THEN:%.*]], label [[IF_END:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: unreachable
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; CHECK: if.end:
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; CHECK-NEXT: [[SUB14:%.*]] = sub nsw i32 [[Y_POS:%.*]], undef
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; CHECK-NEXT: [[SHR15:%.*]] = ashr i32 [[SUB14]], 2
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; CHECK-NEXT: [[TMP0:%.*]] = insertelement <2 x i32> poison, i32 [[SHR15]], i32 0
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; CHECK-NEXT: [[TMP1:%.*]] = insertelement <2 x i32> [[TMP0]], i32 [[SUB14]], i32 1
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; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <2 x i32> [[TMP1]], <2 x i32> poison, <4 x i32> <i32 0, i32 1, i32 1, i32 1>
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; CHECK-NEXT: [[TMP2:%.*]] = icmp sgt <4 x i32> [[SHUFFLE]], <i32 0, i32 -1, i32 -5, i32 -9>
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; CHECK-NEXT: [[TMP3:%.*]] = insertelement <4 x i32> poison, i32 [[SHR15]], i32 0
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; CHECK-NEXT: [[TMP4:%.*]] = insertelement <4 x i32> [[TMP3]], i32 undef, i32 1
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; CHECK-NEXT: [[TMP5:%.*]] = insertelement <4 x i32> [[TMP4]], i32 undef, i32 2
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; CHECK-NEXT: [[TMP6:%.*]] = insertelement <4 x i32> [[TMP5]], i32 undef, i32 3
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; CHECK-NEXT: [[TMP7:%.*]] = select <4 x i1> [[TMP2]], <4 x i32> [[TMP6]], <4 x i32> zeroinitializer
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; CHECK-NEXT: [[TMP8:%.*]] = icmp slt <4 x i32> [[TMP7]], undef
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; CHECK-NEXT: [[TMP9:%.*]] = select <4 x i1> [[TMP8]], <4 x i32> [[TMP7]], <4 x i32> undef
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; CHECK-NEXT: [[TMP10:%.*]] = sext <4 x i32> [[TMP9]] to <4 x i64>
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; CHECK-NEXT: [[TMP11:%.*]] = trunc <4 x i64> [[TMP10]] to <4 x i32>
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; CHECK-NEXT: [[TMP12:%.*]] = extractelement <4 x i32> [[TMP11]], i32 0
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; CHECK-NEXT: [[TMP13:%.*]] = sext i32 [[TMP12]] to i64
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; CHECK-NEXT: [[ARRAYIDX31:%.*]] = getelementptr inbounds i16*, i16** undef, i64 [[TMP13]]
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; CHECK-NEXT: [[TMP14:%.*]] = extractelement <4 x i32> [[TMP11]], i32 1
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; CHECK-NEXT: [[TMP15:%.*]] = sext i32 [[TMP14]] to i64
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; CHECK-NEXT: [[ARRAYIDX31_1:%.*]] = getelementptr inbounds i16*, i16** undef, i64 [[TMP15]]
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; CHECK-NEXT: [[TMP16:%.*]] = extractelement <4 x i32> [[TMP11]], i32 2
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; CHECK-NEXT: [[TMP17:%.*]] = sext i32 [[TMP16]] to i64
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; CHECK-NEXT: [[ARRAYIDX31_2:%.*]] = getelementptr inbounds i16*, i16** undef, i64 [[TMP17]]
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; CHECK-NEXT: [[TMP18:%.*]] = extractelement <4 x i32> [[TMP11]], i32 3
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; CHECK-NEXT: [[TMP19:%.*]] = sext i32 [[TMP18]] to i64
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; CHECK-NEXT: [[ARRAYIDX31_3:%.*]] = getelementptr inbounds i16*, i16** undef, i64 [[TMP19]]
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; CHECK-NEXT: unreachable
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;
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entry:
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br label %land.lhs.true
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land.lhs.true: ; preds = %entry
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br i1 undef, label %if.then, label %if.end
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if.then: ; preds = %land.lhs.true
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unreachable
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if.end: ; preds = %land.lhs.true
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%sub14 = sub nsw i32 %y_pos, undef
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%shr15 = ashr i32 %sub14, 2
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%cmp.i.i = icmp sgt i32 %shr15, 0
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%cond.i.i = select i1 %cmp.i.i, i32 %shr15, i32 0
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%cmp.i4.i = icmp slt i32 %cond.i.i, undef
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%cond.i5.i = select i1 %cmp.i4.i, i32 %cond.i.i, i32 undef
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%idxprom30 = sext i32 %cond.i5.i to i64
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%arrayidx31 = getelementptr inbounds i16*, i16** undef, i64 %idxprom30
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%cmp.i.i.1 = icmp sgt i32 %sub14, -1
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%cond.i.i.1 = select i1 %cmp.i.i.1, i32 undef, i32 0
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%cmp.i4.i.1 = icmp slt i32 %cond.i.i.1, undef
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%cond.i5.i.1 = select i1 %cmp.i4.i.1, i32 %cond.i.i.1, i32 undef
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%idxprom30.1 = sext i32 %cond.i5.i.1 to i64
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%arrayidx31.1 = getelementptr inbounds i16*, i16** undef, i64 %idxprom30.1
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%cmp.i.i.2 = icmp sgt i32 %sub14, -5
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%cond.i.i.2 = select i1 %cmp.i.i.2, i32 undef, i32 0
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%cmp.i4.i.2 = icmp slt i32 %cond.i.i.2, undef
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%cond.i5.i.2 = select i1 %cmp.i4.i.2, i32 %cond.i.i.2, i32 undef
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%idxprom30.2 = sext i32 %cond.i5.i.2 to i64
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%arrayidx31.2 = getelementptr inbounds i16*, i16** undef, i64 %idxprom30.2
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%cmp.i.i.3 = icmp sgt i32 %sub14, -9
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%cond.i.i.3 = select i1 %cmp.i.i.3, i32 undef, i32 0
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%cmp.i4.i.3 = icmp slt i32 %cond.i.i.3, undef
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%cond.i5.i.3 = select i1 %cmp.i4.i.3, i32 %cond.i.i.3, i32 undef
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%idxprom30.3 = sext i32 %cond.i5.i.3 to i64
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%arrayidx31.3 = getelementptr inbounds i16*, i16** undef, i64 %idxprom30.3
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unreachable
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}
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