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
56 lines
2.4 KiB
LLVM
56 lines
2.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -slp-vectorizer -slp-vectorize-hor -slp-vectorize-hor-store -S < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=haswell | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128-ni:1"
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define void @test() #0 {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[DUMMY_PHI:%.*]] = phi i64 [ 1, [[ENTRY:%.*]] ], [ [[OP_EXTRA1:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = phi i64 [ 2, [[ENTRY]] ], [ [[TMP6:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[DUMMY_ADD:%.*]] = add i16 0, 0
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; CHECK-NEXT: [[TMP1:%.*]] = insertelement <4 x i64> poison, i64 [[TMP0]], i32 0
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; CHECK-NEXT: [[TMP2:%.*]] = insertelement <4 x i64> [[TMP1]], i64 [[TMP0]], i32 1
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; CHECK-NEXT: [[TMP3:%.*]] = insertelement <4 x i64> [[TMP2]], i64 [[TMP0]], i32 2
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; CHECK-NEXT: [[TMP4:%.*]] = insertelement <4 x i64> [[TMP3]], i64 [[TMP0]], i32 3
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; CHECK-NEXT: [[TMP5:%.*]] = add <4 x i64> [[TMP4]], <i64 3, i64 2, i64 1, i64 0>
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; CHECK-NEXT: [[TMP6]] = extractelement <4 x i64> [[TMP5]], i32 3
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; CHECK-NEXT: [[TMP7:%.*]] = extractelement <4 x i64> [[TMP5]], i32 0
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; CHECK-NEXT: [[DUMMY_SHL:%.*]] = shl i64 [[TMP7]], 32
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; CHECK-NEXT: [[TMP8:%.*]] = add <4 x i64> <i64 1, i64 1, i64 1, i64 1>, [[TMP5]]
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; CHECK-NEXT: [[TMP9:%.*]] = ashr exact <4 x i64> [[TMP8]], <i64 32, i64 32, i64 32, i64 32>
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; CHECK-NEXT: [[TMP10:%.*]] = call i64 @llvm.vector.reduce.add.v4i64(<4 x i64> [[TMP9]])
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; CHECK-NEXT: [[OP_EXTRA:%.*]] = add i64 [[TMP10]], 0
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; CHECK-NEXT: [[OP_EXTRA1]] = add i64 [[OP_EXTRA]], [[TMP6]]
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; CHECK-NEXT: br label [[LOOP]]
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;
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entry:
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br label %loop
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loop:
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%dummy_phi = phi i64 [ 1, %entry ], [ %last, %loop ]
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%0 = phi i64 [ 2, %entry ], [ %fork, %loop ]
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%inc1 = add i64 %0, 1
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%inc2 = add i64 %0, 2
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%inc11 = add i64 1, %inc1
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%exact1 = ashr exact i64 %inc11, 32
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%inc3 = add i64 %0, 3
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%dummy_add = add i16 0, 0
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%inc12 = add i64 1, %inc2
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%exact2 = ashr exact i64 %inc12, 32
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%dummy_shl = shl i64 %inc3, 32
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%inc13 = add i64 1, %inc3
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%exact3 = ashr exact i64 %inc13, 32
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%fork = add i64 %0, 0
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%sum1 = add i64 %exact3, %exact2
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%sum2 = add i64 %sum1, %exact1
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%zsum = add i64 %sum2, 0
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%sext22 = add i64 1, %fork
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%exact4 = ashr exact i64 %sext22, 32
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%join = add i64 %fork, %zsum
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%last = add i64 %join, %exact4
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br label %loop
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}
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