6c767cef5a
Canonicalize GEP of GEP by swapping GEP with some suffix constant indices to the back (and GEP with all constant indices to the back of that), this allows more constant index GEP merging to happen. Exceptions are: If swapping violates use-def relations, or anti-optimizes LICM For constant indexed GEP of GEP, if they cannot be merged directly, they will be casted to i8* and merged. Reviewed By: nikic Differential Revision: https://reviews.llvm.org/D125845
129 lines
7.4 KiB
LLVM
129 lines
7.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; This is the loop in c++ being vectorize in this file with
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; shuffle reverse
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;#pragma clang loop vectorize_width(4, fixed)
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; for (long int i = N - 1; i >= 0; i--)
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; {
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; if (cond[i])
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; a[i] += 1;
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; }
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; The test checks if the mask is being correctly created, reverted and used
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; RUN: opt -loop-vectorize -dce -instcombine -mtriple aarch64-linux-gnu -S \
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; RUN: -prefer-predicate-over-epilogue=scalar-epilogue < %s | FileCheck %s
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target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
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target triple = "aarch64-unknown-linux-gnu"
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define void @vector_reverse_mask_v4i1(double* noalias %a, double* noalias %cond, i64 %N) #0 {
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; CHECK-LABEL: @vector_reverse_mask_v4i1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP7:%.*]] = icmp sgt i64 [[N:%.*]], 0
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; CHECK-NEXT: br i1 [[CMP7]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_COND_CLEANUP:%.*]]
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; CHECK: for.body.preheader:
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; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 8
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; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
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; CHECK: vector.ph:
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; CHECK-NEXT: [[N_VEC:%.*]] = and i64 [[N]], -8
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; CHECK-NEXT: [[IND_END:%.*]] = and i64 [[N]], 7
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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 i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = xor i64 [[INDEX]], -1
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; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[TMP0]], [[N]]
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; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds double, double* [[COND:%.*]], i64 [[TMP1]]
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; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds double, double* [[TMP2]], i64 -3
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; CHECK-NEXT: [[TMP4:%.*]] = bitcast double* [[TMP3]] to <4 x double>*
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; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <4 x double>, <4 x double>* [[TMP4]], align 8
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; CHECK-NEXT: [[REVERSE:%.*]] = shufflevector <4 x double> [[WIDE_LOAD]], <4 x double> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
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; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds double, double* [[TMP2]], i64 -7
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; CHECK-NEXT: [[TMP7:%.*]] = bitcast double* [[TMP6]] to <4 x double>*
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; CHECK-NEXT: [[WIDE_LOAD1:%.*]] = load <4 x double>, <4 x double>* [[TMP7]], align 8
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; CHECK-NEXT: [[REVERSE2:%.*]] = shufflevector <4 x double> [[WIDE_LOAD1]], <4 x double> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
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; CHECK-NEXT: [[TMP8:%.*]] = fcmp une <4 x double> [[REVERSE]], zeroinitializer
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; CHECK-NEXT: [[TMP9:%.*]] = fcmp une <4 x double> [[REVERSE2]], zeroinitializer
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; CHECK-NEXT: [[TMP10:%.*]] = getelementptr double, double* [[A:%.*]], i64 [[TMP1]]
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; CHECK-NEXT: [[TMP11:%.*]] = getelementptr double, double* [[TMP10]], i64 -3
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; CHECK-NEXT: [[REVERSE3:%.*]] = shufflevector <4 x i1> [[TMP8]], <4 x i1> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
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; CHECK-NEXT: [[TMP12:%.*]] = bitcast double* [[TMP11]] to <4 x double>*
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; CHECK-NEXT: [[WIDE_MASKED_LOAD:%.*]] = call <4 x double> @llvm.masked.load.v4f64.p0v4f64(<4 x double>* [[TMP12]], i32 8, <4 x i1> [[REVERSE3]], <4 x double> poison)
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; CHECK-NEXT: [[TMP14:%.*]] = getelementptr double, double* [[TMP10]], i64 -7
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; CHECK-NEXT: [[REVERSE5:%.*]] = shufflevector <4 x i1> [[TMP9]], <4 x i1> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
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; CHECK-NEXT: [[TMP15:%.*]] = bitcast double* [[TMP14]] to <4 x double>*
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; CHECK-NEXT: [[WIDE_MASKED_LOAD6:%.*]] = call <4 x double> @llvm.masked.load.v4f64.p0v4f64(<4 x double>* [[TMP15]], i32 8, <4 x i1> [[REVERSE5]], <4 x double> poison)
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; CHECK-NEXT: [[TMP16:%.*]] = fadd <4 x double> [[WIDE_MASKED_LOAD]], <double 1.000000e+00, double 1.000000e+00, double 1.000000e+00, double 1.000000e+00>
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; CHECK-NEXT: [[TMP17:%.*]] = fadd <4 x double> [[WIDE_MASKED_LOAD6]], <double 1.000000e+00, double 1.000000e+00, double 1.000000e+00, double 1.000000e+00>
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; CHECK-NEXT: [[TMP18:%.*]] = bitcast double* [[TMP11]] to <4 x double>*
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; CHECK-NEXT: call void @llvm.masked.store.v4f64.p0v4f64(<4 x double> [[TMP16]], <4 x double>* [[TMP18]], i32 8, <4 x i1> [[REVERSE3]])
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; CHECK-NEXT: [[TMP19:%.*]] = bitcast double* [[TMP14]] to <4 x double>*
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; CHECK-NEXT: call void @llvm.masked.store.v4f64.p0v4f64(<4 x double> [[TMP17]], <4 x double>* [[TMP19]], i32 8, <4 x i1> [[REVERSE5]])
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; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 8
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; CHECK-NEXT: [[TMP20:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
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; CHECK-NEXT: br i1 [[TMP20]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
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; CHECK: middle.block:
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; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N_VEC]], [[N]]
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; CHECK-NEXT: br i1 [[CMP_N]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]], label [[SCALAR_PH]]
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; CHECK: scalar.ph:
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; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ [[N]], [[FOR_BODY_PREHEADER]] ]
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.cond.cleanup.loopexit:
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; CHECK-NEXT: br label [[FOR_COND_CLEANUP]]
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; CHECK: for.cond.cleanup:
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; CHECK-NEXT: ret void
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; CHECK: for.body:
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; CHECK-NEXT: [[I_08_IN:%.*]] = phi i64 [ [[I_08:%.*]], [[FOR_INC:%.*]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
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; CHECK-NEXT: [[I_08]] = add nsw i64 [[I_08_IN]], -1
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds double, double* [[COND]], i64 [[I_08]]
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; CHECK-NEXT: [[TMP21:%.*]] = load double, double* [[ARRAYIDX]], align 8
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; CHECK-NEXT: [[TOBOOL:%.*]] = fcmp une double [[TMP21]], 0.000000e+00
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; CHECK-NEXT: br i1 [[TOBOOL]], label [[IF_THEN:%.*]], label [[FOR_INC]]
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; CHECK: if.then:
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; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds double, double* [[A]], i64 [[I_08]]
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; CHECK-NEXT: [[TMP22:%.*]] = load double, double* [[ARRAYIDX1]], align 8
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; CHECK-NEXT: [[ADD:%.*]] = fadd double [[TMP22]], 1.000000e+00
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; CHECK-NEXT: store double [[ADD]], double* [[ARRAYIDX1]], align 8
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; CHECK-NEXT: br label [[FOR_INC]]
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; CHECK: for.inc:
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i64 [[I_08_IN]], 1
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; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_COND_CLEANUP_LOOPEXIT]], !llvm.loop [[LOOP3:![0-9]+]]
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;
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entry:
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%cmp7 = icmp sgt i64 %N, 0
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br i1 %cmp7, label %for.body, label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.cond.cleanup, %entry
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ret void
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for.body: ; preds = %for.body, %entry
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%i.08.in = phi i64 [ %i.08, %for.inc ], [ %N, %entry ]
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%i.08 = add nsw i64 %i.08.in, -1
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%arrayidx = getelementptr inbounds double, double* %cond, i64 %i.08
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%0 = load double, double* %arrayidx, align 8
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%tobool = fcmp une double %0, 0.000000e+00
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br i1 %tobool, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%arrayidx1 = getelementptr inbounds double, double* %a, i64 %i.08
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%1 = load double, double* %arrayidx1, align 8
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%add = fadd double %1, 1.000000e+00
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store double %add, double* %arrayidx1, align 8
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%cmp = icmp sgt i64 %i.08.in, 1
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br i1 %cmp, label %for.body, label %for.cond.cleanup, !llvm.loop !0
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}
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attributes #0 = {"target-cpu"="generic" "target-features"="+neon,+sve" vscale_range(2,0) }
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!0 = distinct !{!0, !1, !2, !3, !4, !5}
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!1 = !{!"llvm.loop.mustprogress"}
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!2 = !{!"llvm.loop.vectorize.width", i32 4}
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!3 = !{!"llvm.loop.vectorize.scalable.enable", i1 false}
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!4 = !{!"llvm.loop.vectorize.enable", i1 true}
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!5 = !{!"llvm.loop.interleave.count", i32 2}
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