b10ecfa914
Currently SLP vectorizer tries to keep only GEPs as scalar, if they are vectorized but used externally. Same approach can be used for all scalar values. This patch tries to keep original scalars if all its operands remain scalar or externally used, the cost of the original scalar is lower than the cost of the extractelement instruction, or if the number of externally used scalars in the same entry is power of 2. Last criterion allows better revectorization for multiply used scalars. Reviewers: RKSimon Reviewed By: RKSimon Pull Request: https://github.com/llvm/llvm-project/pull/100904
70 lines
3.0 KiB
LLVM
70 lines
3.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=slp-vectorizer -S -mtriple=x86_64-unknown-linux-gnu -mcpu=skylake < %s | FileCheck %s
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define void @mainTest(i32 %param, ptr %vals, i32 %len) {
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; CHECK-LABEL: @mainTest(
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; CHECK-NEXT: bci_15.preheader:
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; CHECK-NEXT: [[TMP0:%.*]] = insertelement <2 x i32> <i32 poison, i32 31>, i32 [[PARAM:%.*]], i32 0
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; CHECK-NEXT: br label [[BCI_15:%.*]]
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; CHECK: bci_15:
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; CHECK-NEXT: [[LOCAL_0_:%.*]] = phi i32 [ [[OP_RDX:%.*]], [[BCI_15]] ], [ [[PARAM]], [[BCI_15_PREHEADER:%.*]] ]
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; CHECK-NEXT: [[LOCAL_4_:%.*]] = phi i32 [ [[V44:%.*]], [[BCI_15]] ], [ 31, [[BCI_15_PREHEADER]] ]
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; CHECK-NEXT: [[TMP1:%.*]] = phi <2 x i32> [ [[TMP6:%.*]], [[BCI_15]] ], [ [[TMP0]], [[BCI_15_PREHEADER]] ]
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; CHECK-NEXT: [[TMP2:%.*]] = shufflevector <2 x i32> [[TMP1]], <2 x i32> poison, <16 x i32> <i32 0, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1>
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; CHECK-NEXT: [[TMP3:%.*]] = add <16 x i32> [[TMP2]], <i32 -1, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
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; CHECK-NEXT: store atomic i32 [[LOCAL_0_]], ptr [[VALS:%.*]] unordered, align 4
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; CHECK-NEXT: [[TMP4:%.*]] = call i32 @llvm.vector.reduce.and.v16i32(<16 x i32> [[TMP3]])
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; CHECK-NEXT: [[OP_RDX]] = and i32 [[TMP4]], [[LOCAL_4_]]
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; CHECK-NEXT: [[V44]] = add i32 [[LOCAL_4_]], 16
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; CHECK-NEXT: [[TMP5:%.*]] = insertelement <2 x i32> poison, i32 [[OP_RDX]], i32 0
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; CHECK-NEXT: [[TMP6]] = insertelement <2 x i32> [[TMP5]], i32 [[V44]], i32 1
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; CHECK-NEXT: br i1 true, label [[BCI_15]], label [[LOOPEXIT:%.*]]
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; CHECK: loopexit:
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; CHECK-NEXT: ret void
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;
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bci_15.preheader:
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br label %bci_15
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bci_15: ; preds = %bci_15.preheader, %bci_15
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%local_0_ = phi i32 [ %v43, %bci_15 ], [ %param, %bci_15.preheader ]
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%local_4_ = phi i32 [ %v44, %bci_15 ], [ 31, %bci_15.preheader ]
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%v12 = add i32 %local_0_, -1
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store atomic i32 %local_0_, ptr %vals unordered, align 4
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%v13 = add i32 %local_4_, 1
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%v14 = and i32 %local_4_, %v12
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%v15 = add i32 %local_4_, 2
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%v16 = and i32 %v13, %v14
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%v17 = add i32 %local_4_, 3
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%v18 = and i32 %v15, %v16
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%v19 = add i32 %local_4_, 4
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%v20 = and i32 %v17, %v18
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%v21 = add i32 %local_4_, 5
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%v22 = and i32 %v19, %v20
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%v23 = add i32 %local_4_, 6
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%v24 = and i32 %v21, %v22
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%v25 = add i32 %local_4_, 7
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%v26 = and i32 %v23, %v24
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%v27 = add i32 %local_4_, 8
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%v28 = and i32 %v25, %v26
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%v29 = add i32 %local_4_, 9
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%v30 = and i32 %v27, %v28
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%v31 = add i32 %local_4_, 10
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%v32 = and i32 %v29, %v30
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%v33 = add i32 %local_4_, 11
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%v34 = and i32 %v31, %v32
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%v35 = add i32 %local_4_, 12
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%v36 = and i32 %v33, %v34
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%v37 = add i32 %local_4_, 13
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%v38 = and i32 %v35, %v36
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%v39 = add i32 %local_4_, 14
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%v40 = and i32 %v37, %v38
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%v41 = add i32 %local_4_, 15
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%v42 = and i32 %v39, %v40
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%v43 = and i32 %v41, %v42
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%v44 = add i32 %local_4_, 16
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br i1 true, label %bci_15, label %loopexit
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loopexit:
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ret void
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}
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