| ; RUN: opt %s -loop-vectorize -force-vector-width=4 -force-vector-interleave=1 -S | FileCheck %s |
| |
| ; Make sure that integer poison-generating flags (i.e., nuw/nsw, exact and inbounds) |
| ; are dropped from instructions in blocks that need predication and are linearized |
| ; and masked after vectorization. We only drop flags from scalar instructions that |
| ; contribute to the address computation of a masked vector load/store. After |
| ; linearizing the control flow and removing their guarding condition, these |
| ; instructions could generate a poison value which would be used as base address of |
| ; the masked vector load/store (see PR52111). For gather/scatter cases, |
| ; posiong-generating flags can be preserved since poison addresses in the vector GEP |
| ; reaching the gather/scatter instruction will be masked-out by the gather/scatter |
| ; instruction itself and won't be used. |
| ; We need AVX512 target features for the loop to be vectorized with masks instead of |
| ; predicates. |
| |
| target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-pc-linux-gnu" |
| |
| ; Drop poison-generating flags from 'sub' and 'getelementptr' feeding a masked load. |
| ; Test for PR52111. |
| define void @drop_scalar_nuw_nsw(float* noalias nocapture readonly %input, |
| float* %output) local_unnamed_addr #0 { |
| ; CHECK-LABEL: @drop_scalar_nuw_nsw( |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, {{.*}} ] |
| ; CHECK-NEXT: [[VEC_IND:%.*]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, {{.*}} ] |
| ; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0 |
| ; CHECK: [[TMP4:%.*]] = icmp eq <4 x i64> [[VEC_IND]], zeroinitializer |
| ; CHECK-NEXT: [[TMP5:%.*]] = sub i64 [[TMP0]], 1 |
| ; CHECK-NEXT: [[TMP6:%.*]] = getelementptr float, float* [[INPUT:%.*]], i64 [[TMP5]] |
| ; CHECK-NEXT: [[TMP7:%.*]] = xor <4 x i1> [[TMP4]], <i1 true, i1 true, i1 true, i1 true> |
| ; CHECK-NEXT: [[TMP8:%.*]] = getelementptr float, float* [[TMP6]], i32 0 |
| ; CHECK-NEXT: [[TMP9:%.*]] = bitcast float* [[TMP8]] to <4 x float>* |
| ; CHECK-NEXT: [[WIDE_MASKED_LOAD:%.*]] = call <4 x float> @llvm.masked.load.v4f32.p0v4f32(<4 x float>* [[TMP9]], i32 4, <4 x i1> [[TMP7]], <4 x float> poison), !invariant.load !0 |
| entry: |
| br label %loop.header |
| |
| loop.header: |
| %iv = phi i64 [ 0, %entry ], [ %iv.inc, %if.end ] |
| %i23 = icmp eq i64 %iv, 0 |
| br i1 %i23, label %if.end, label %if.then |
| |
| if.then: |
| %i27 = sub nuw nsw i64 %iv, 1 |
| %i29 = getelementptr inbounds float, float* %input, i64 %i27 |
| %i30 = load float, float* %i29, align 4, !invariant.load !0 |
| br label %if.end |
| |
| if.end: |
| %i34 = phi float [ 0.000000e+00, %loop.header ], [ %i30, %if.then ] |
| %i35 = getelementptr inbounds float, float* %output, i64 %iv |
| store float %i34, float* %i35, align 4 |
| %iv.inc = add nuw nsw i64 %iv, 1 |
| %exitcond = icmp eq i64 %iv.inc, 4 |
| br i1 %exitcond, label %loop.exit, label %loop.header |
| |
| loop.exit: |
| ret void |
| } |
| |
| ; Drop poison-generating flags from 'sub' and 'getelementptr' feeding a masked load. |
| ; In this case, 'sub' and 'getelementptr' are not guarded by the predicate. |
| define void @drop_nonpred_scalar_nuw_nsw(float* noalias nocapture readonly %input, |
| float* %output) local_unnamed_addr #0 { |
| ; CHECK-LABEL: @drop_nonpred_scalar_nuw_nsw( |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, {{.*}} ] |
| ; CHECK-NEXT: [[VEC_IND:%.*]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, {{.*}} ] |
| ; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0 |
| ; CHECK: [[TMP5:%.*]] = sub i64 [[TMP0]], 1 |
| ; CHECK-NEXT: [[TMP6:%.*]] = getelementptr float, float* [[INPUT:%.*]], i64 [[TMP5]] |
| ; CHECK-NEXT: [[TMP4:%.*]] = icmp eq <4 x i64> [[VEC_IND]], zeroinitializer |
| ; CHECK-NEXT: [[TMP7:%.*]] = xor <4 x i1> [[TMP4]], <i1 true, i1 true, i1 true, i1 true> |
| ; CHECK-NEXT: [[TMP8:%.*]] = getelementptr float, float* [[TMP6]], i32 0 |
| ; CHECK-NEXT: [[TMP9:%.*]] = bitcast float* [[TMP8]] to <4 x float>* |
| ; CHECK-NEXT: [[WIDE_MASKED_LOAD:%.*]] = call <4 x float> @llvm.masked.load.v4f32.p0v4f32(<4 x float>* [[TMP9]], i32 4, <4 x i1> [[TMP7]], <4 x float> poison), !invariant.load !0 |
| entry: |
| br label %loop.header |
| |
| loop.header: |
| %iv = phi i64 [ 0, %entry ], [ %iv.inc, %if.end ] |
| %i27 = sub i64 %iv, 1 |
| %i29 = getelementptr float, float* %input, i64 %i27 |
| %i23 = icmp eq i64 %iv, 0 |
| br i1 %i23, label %if.end, label %if.then |
| |
| if.then: |
| %i30 = load float, float* %i29, align 4, !invariant.load !0 |
| br label %if.end |
| |
| if.end: |
| %i34 = phi float [ 0.000000e+00, %loop.header ], [ %i30, %if.then ] |
| %i35 = getelementptr inbounds float, float* %output, i64 %iv |
| store float %i34, float* %i35, align 4 |
| %iv.inc = add nuw nsw i64 %iv, 1 |
| %exitcond = icmp eq i64 %iv.inc, 4 |
| br i1 %exitcond, label %loop.exit, label %loop.header |
| |
| loop.exit: |
| ret void |
| } |
| |
| ; Preserve poison-generating flags from vector 'sub', 'mul' and 'getelementptr' feeding a masked gather. |
| define void @preserve_vector_nuw_nsw(float* noalias nocapture readonly %input, |
| float* %output) local_unnamed_addr #0 { |
| ; CHECK-LABEL: @preserve_vector_nuw_nsw( |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, {{.*}} ] |
| ; CHECK-NEXT: [[VEC_IND:%.*]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, {{.*}} ] |
| ; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0 |
| ; CHECK: [[TMP4:%.*]] = icmp eq <4 x i64> [[VEC_IND]], zeroinitializer |
| ; CHECK-NEXT: [[TMP5:%.*]] = sub nuw nsw <4 x i64> [[VEC_IND]], <i64 1, i64 1, i64 1, i64 1> |
| ; CHECK-NEXT: [[TMP6:%.*]] = mul nuw nsw <4 x i64> [[TMP5]], <i64 2, i64 2, i64 2, i64 2> |
| ; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds float, float* [[INPUT:%.*]], <4 x i64> [[TMP6]] |
| ; CHECK-NEXT: [[TMP8:%.*]] = xor <4 x i1> [[TMP4]], <i1 true, i1 true, i1 true, i1 true> |
| ; CHECK-NEXT: [[WIDE_MASKED_GATHER:%.*]] = call <4 x float> @llvm.masked.gather.v4f32.v4p0f32(<4 x float*> [[TMP7]], i32 4, <4 x i1> [[TMP8]], <4 x float> undef), !invariant.load !0 |
| entry: |
| br label %loop.header |
| |
| loop.header: |
| %iv = phi i64 [ 0, %entry ], [ %iv.inc, %if.end ] |
| %i23 = icmp eq i64 %iv, 0 |
| br i1 %i23, label %if.end, label %if.then |
| |
| if.then: |
| %i27 = sub nuw nsw i64 %iv, 1 |
| %i28 = mul nuw nsw i64 %i27, 2 |
| %i29 = getelementptr inbounds float, float* %input, i64 %i28 |
| %i30 = load float, float* %i29, align 4, !invariant.load !0 |
| br label %if.end |
| |
| if.end: |
| %i34 = phi float [ 0.000000e+00, %loop.header ], [ %i30, %if.then ] |
| %i35 = getelementptr inbounds float, float* %output, i64 %iv |
| store float %i34, float* %i35, align 4 |
| %iv.inc = add nuw nsw i64 %iv, 1 |
| %exitcond = icmp eq i64 %iv.inc, 4 |
| br i1 %exitcond, label %loop.exit, label %loop.header |
| |
| loop.exit: |
| ret void |
| } |
| |
| ; Drop poison-generating flags from vector 'sub' and 'gep' feeding a masked load. |
| define void @drop_vector_nuw_nsw(float* noalias nocapture readonly %input, |
| float* %output, float** noalias %ptrs) local_unnamed_addr #0 { |
| ; CHECK-LABEL: @drop_vector_nuw_nsw( |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, {{.*}} ] |
| ; CHECK-NEXT: [[VEC_IND:%.*]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, {{.*}} ] |
| ; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0 |
| ; CHECK: [[TMP4:%.*]] = icmp eq <4 x i64> [[VEC_IND]], zeroinitializer |
| ; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds float*, float** [[PTRS:%.*]], i64 [[TMP0]] |
| ; CHECK-NEXT: [[TMP6:%.*]] = sub <4 x i64> [[VEC_IND]], <i64 1, i64 1, i64 1, i64 1> |
| ; CHECK-NEXT: [[TMP7:%.*]] = getelementptr float, float* [[INPUT:%.*]], <4 x i64> [[TMP6]] |
| ; CHECK: [[TMP10:%.*]] = xor <4 x i1> [[TMP4]], <i1 true, i1 true, i1 true, i1 true> |
| ; CHECK-NEXT: [[TMP11:%.*]] = extractelement <4 x float*> [[TMP7]], i32 0 |
| ; CHECK-NEXT: [[TMP12:%.*]] = getelementptr float, float* [[TMP11]], i32 0 |
| ; CHECK-NEXT: [[TMP13:%.*]] = bitcast float* [[TMP12]] to <4 x float>* |
| ; CHECK-NEXT: [[WIDE_MASKED_LOAD:%.*]] = call <4 x float> @llvm.masked.load.v4f32.p0v4f32(<4 x float>* [[TMP13]], i32 4, <4 x i1> [[TMP10]], <4 x float> poison), !invariant.load !0 |
| entry: |
| br label %loop.header |
| |
| loop.header: |
| %iv = phi i64 [ 0, %entry ], [ %iv.inc, %if.end ] |
| %i23 = icmp eq i64 %iv, 0 |
| %gep = getelementptr inbounds float*, float** %ptrs, i64 %iv |
| %i27 = sub nuw nsw i64 %iv, 1 |
| %i29 = getelementptr inbounds float, float* %input, i64 %i27 |
| store float* %i29, float** %gep |
| br i1 %i23, label %if.end, label %if.then |
| |
| if.then: |
| %i30 = load float, float* %i29, align 4, !invariant.load !0 |
| br label %if.end |
| |
| if.end: |
| %i34 = phi float [ 0.000000e+00, %loop.header ], [ %i30, %if.then ] |
| %i35 = getelementptr inbounds float, float* %output, i64 %iv |
| store float %i34, float* %i35, align 4 |
| %iv.inc = add nuw nsw i64 %iv, 1 |
| %exitcond = icmp eq i64 %iv.inc, 4 |
| br i1 %exitcond, label %loop.exit, label %loop.header |
| |
| loop.exit: |
| ret void |
| } |
| |
| ; Preserve poison-generating flags from 'sub', which is not contributing to any address computation |
| ; of any masked load/store/gather/scatter. |
| define void @preserve_nuw_nsw_no_addr(i64* %output) local_unnamed_addr #0 { |
| ; CHECK-LABEL: @preserve_nuw_nsw_no_addr( |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, {{.*}} ] |
| ; CHECK-NEXT: [[VEC_IND:%.*]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, {{.*}} ] |
| ; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0 |
| ; CHECK: [[TMP4:%.*]] = icmp eq <4 x i64> [[VEC_IND]], zeroinitializer |
| ; CHECK-NEXT: [[TMP5:%.*]] = sub nuw nsw <4 x i64> [[VEC_IND]], <i64 1, i64 1, i64 1, i64 1> |
| ; CHECK-NEXT: [[TMP6:%.*]] = xor <4 x i1> [[TMP4]], <i1 true, i1 true, i1 true, i1 true> |
| ; CHECK-NEXT: [[PREDPHI:%.*]] = select <4 x i1> [[TMP6]], <4 x i64> [[TMP5]], <4 x i64> zeroinitializer |
| ; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds i64, i64* [[OUTPUT:%.*]], i64 [[TMP0]] |
| ; CHECK-NEXT: [[TMP8:%.*]] = getelementptr inbounds i64, i64* [[TMP7]], i32 0 |
| ; CHECK-NEXT: [[TMP9:%.*]] = bitcast i64* [[TMP8]] to <4 x i64>* |
| ; CHECK-NEXT: store <4 x i64> [[PREDPHI]], <4 x i64>* [[TMP9]], align 4 |
| entry: |
| br label %loop.header |
| |
| loop.header: |
| %iv = phi i64 [ 0, %entry ], [ %iv.inc, %if.end ] |
| %i23 = icmp eq i64 %iv, 0 |
| br i1 %i23, label %if.end, label %if.then |
| |
| if.then: |
| %i27 = sub nuw nsw i64 %iv, 1 |
| br label %if.end |
| |
| if.end: |
| %i34 = phi i64 [ 0, %loop.header ], [ %i27, %if.then ] |
| %i35 = getelementptr inbounds i64, i64* %output, i64 %iv |
| store i64 %i34, i64* %i35, align 4 |
| %iv.inc = add nuw nsw i64 %iv, 1 |
| %exitcond = icmp eq i64 %iv.inc, 4 |
| br i1 %exitcond, label %loop.exit, label %loop.header |
| |
| loop.exit: |
| ret void |
| } |
| |
| ; Drop poison-generating flags from 'sdiv' and 'getelementptr' feeding a masked load. |
| define void @drop_scalar_exact(float* noalias nocapture readonly %input, |
| float* %output) local_unnamed_addr #0 { |
| ; CHECK-LABEL: @drop_scalar_exact( |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, {{.*}} ] |
| ; CHECK-NEXT: [[VEC_IND:%.*]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, {{.*}} ] |
| ; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0 |
| ; CHECK: [[TMP4:%.*]] = icmp ne <4 x i64> [[VEC_IND]], zeroinitializer |
| ; CHECK-NEXT: [[TMP5:%.*]] = and <4 x i64> [[VEC_IND]], <i64 1, i64 1, i64 1, i64 1> |
| ; CHECK-NEXT: [[TMP6:%.*]] = icmp eq <4 x i64> [[TMP5]], zeroinitializer |
| ; CHECK-NEXT: [[TMP7:%.*]] = and <4 x i1> [[TMP4]], [[TMP6]] |
| ; CHECK-NEXT: [[TMP8:%.*]] = sdiv i64 [[TMP0]], 1 |
| ; CHECK-NEXT: [[TMP9:%.*]] = getelementptr float, float* [[INPUT:%.*]], i64 [[TMP8]] |
| ; CHECK-NEXT: [[TMP10:%.*]] = xor <4 x i1> [[TMP7]], <i1 true, i1 true, i1 true, i1 true> |
| ; CHECK-NEXT: [[TMP11:%.*]] = getelementptr float, float* [[TMP9]], i32 0 |
| ; CHECK-NEXT: [[TMP12:%.*]] = bitcast float* [[TMP11]] to <4 x float>* |
| ; CHECK-NEXT: [[WIDE_MASKED_LOAD:%.*]] = call <4 x float> @llvm.masked.load.v4f32.p0v4f32(<4 x float>* [[TMP12]], i32 4, <4 x i1> [[TMP10]], <4 x float> poison), !invariant.load !0 |
| entry: |
| br label %loop.header |
| |
| loop.header: |
| %iv = phi i64 [ 0, %entry ], [ %iv.inc, %if.end ] |
| %i7 = icmp ne i64 %iv, 0 |
| %i8 = and i64 %iv, 1 |
| %i9 = icmp eq i64 %i8, 0 |
| %i10 = and i1 %i7, %i9 |
| br i1 %i10, label %if.end, label %if.then |
| |
| if.then: |
| %i26 = sdiv exact i64 %iv, 1 |
| %i29 = getelementptr inbounds float, float* %input, i64 %i26 |
| %i30 = load float, float* %i29, align 4, !invariant.load !0 |
| br label %if.end |
| |
| if.end: |
| %i34 = phi float [ 0.000000e+00, %loop.header ], [ %i30, %if.then ] |
| %i35 = getelementptr inbounds float, float* %output, i64 %iv |
| store float %i34, float* %i35, align 4 |
| %iv.inc = add nuw nsw i64 %iv, 1 |
| %exitcond = icmp eq i64 %iv.inc, 4 |
| br i1 %exitcond, label %loop.exit, label %loop.header |
| |
| loop.exit: |
| ret void |
| } |
| |
| ; Preserve poison-generating flags from 'sdiv' and 'getelementptr' feeding a masked gather. |
| define void @preserve_vector_exact_no_addr(float* noalias nocapture readonly %input, |
| float* %output) local_unnamed_addr #0 { |
| ; CHECK-LABEL: @preserve_vector_exact_no_addr( |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, {{.*}} ] |
| ; CHECK-NEXT: [[VEC_IND:%.*]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, {{.*}} ] |
| ; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0 |
| ; CHECK: [[TMP4:%.*]] = icmp ne <4 x i64> [[VEC_IND]], zeroinitializer |
| ; CHECK-NEXT: [[TMP5:%.*]] = and <4 x i64> [[VEC_IND]], <i64 1, i64 1, i64 1, i64 1> |
| ; CHECK-NEXT: [[TMP6:%.*]] = icmp eq <4 x i64> [[TMP5]], zeroinitializer |
| ; CHECK-NEXT: [[TMP7:%.*]] = and <4 x i1> [[TMP4]], [[TMP6]] |
| ; CHECK-NEXT: [[TMP8:%.*]] = sdiv exact <4 x i64> [[VEC_IND]], <i64 2, i64 2, i64 2, i64 2> |
| ; CHECK-NEXT: [[TMP9:%.*]] = getelementptr inbounds float, float* [[INPUT:%.*]], <4 x i64> [[TMP8]] |
| ; CHECK-NEXT: [[TMP10:%.*]] = xor <4 x i1> [[TMP7]], <i1 true, i1 true, i1 true, i1 true> |
| ; CHECK-NEXT: [[WIDE_MASKED_GATHER:%.*]] = call <4 x float> @llvm.masked.gather.v4f32.v4p0f32(<4 x float*> [[TMP9]], i32 4, <4 x i1> [[TMP10]], <4 x float> undef), !invariant.load !0 |
| ; |
| entry: |
| br label %loop.header |
| |
| loop.header: |
| %iv = phi i64 [ 0, %entry ], [ %iv.inc, %if.end ] |
| %i7 = icmp ne i64 %iv, 0 |
| %i8 = and i64 %iv, 1 |
| %i9 = icmp eq i64 %i8, 0 |
| %i10 = and i1 %i7, %i9 |
| br i1 %i10, label %if.end, label %if.then |
| |
| if.then: |
| %i26 = sdiv exact i64 %iv, 2 |
| %i29 = getelementptr inbounds float, float* %input, i64 %i26 |
| %i30 = load float, float* %i29, align 4, !invariant.load !0 |
| br label %if.end |
| |
| if.end: |
| %i34 = phi float [ 0.000000e+00, %loop.header ], [ %i30, %if.then ] |
| %i35 = getelementptr inbounds float, float* %output, i64 %iv |
| store float %i34, float* %i35, align 4 |
| %iv.inc = add nuw nsw i64 %iv, 1 |
| %exitcond = icmp eq i64 %iv.inc, 4 |
| br i1 %exitcond, label %loop.exit, label %loop.header |
| |
| loop.exit: |
| ret void |
| } |
| |
| ; Preserve poison-generating flags from 'sdiv', which is not contributing to any address computation |
| ; of any masked load/store/gather/scatter. |
| define void @preserve_exact_no_addr(i64* %output) local_unnamed_addr #0 { |
| ; CHECK-LABEL: @preserve_exact_no_addr( |
| ; CHECK: vector.body: |
| ; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, {{.*}} ] |
| ; CHECK-NEXT: [[VEC_IND:%.*]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, {{.*}} ] |
| ; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0 |
| ; CHECK: [[TMP4:%.*]] = icmp eq <4 x i64> [[VEC_IND]], zeroinitializer |
| ; CHECK-NEXT: [[TMP5:%.*]] = sdiv exact <4 x i64> [[VEC_IND]], <i64 2, i64 2, i64 2, i64 2> |
| ; CHECK-NEXT: [[TMP6:%.*]] = xor <4 x i1> [[TMP4]], <i1 true, i1 true, i1 true, i1 true> |
| ; CHECK-NEXT: [[PREDPHI:%.*]] = select <4 x i1> [[TMP6]], <4 x i64> [[TMP5]], <4 x i64> zeroinitializer |
| ; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds i64, i64* [[OUTPUT:%.*]], i64 [[TMP0]] |
| ; CHECK-NEXT: [[TMP8:%.*]] = getelementptr inbounds i64, i64* [[TMP7]], i32 0 |
| ; CHECK-NEXT: [[TMP9:%.*]] = bitcast i64* [[TMP8]] to <4 x i64>* |
| ; CHECK-NEXT: store <4 x i64> [[PREDPHI]], <4 x i64>* [[TMP9]], align 4 |
| entry: |
| br label %loop.header |
| |
| loop.header: |
| %iv = phi i64 [ 0, %entry ], [ %iv.inc, %if.end ] |
| %i23 = icmp eq i64 %iv, 0 |
| br i1 %i23, label %if.end, label %if.then |
| |
| if.then: |
| %i27 = sdiv exact i64 %iv, 2 |
| br label %if.end |
| |
| if.end: |
| %i34 = phi i64 [ 0, %loop.header ], [ %i27, %if.then ] |
| %i35 = getelementptr inbounds i64, i64* %output, i64 %iv |
| store i64 %i34, i64* %i35, align 4 |
| %iv.inc = add nuw nsw i64 %iv, 1 |
| %exitcond = icmp eq i64 %iv.inc, 4 |
| br i1 %exitcond, label %loop.exit, label %loop.header |
| |
| loop.exit: |
| ret void |
| } |
| |
| ; Make sure we don't vectorize a loop with a phi feeding a poison value to |
| ; a masked load/gather. |
| define void @dont_vectorize_poison_phi(float* noalias nocapture readonly %input, |
| ; CHECK-LABEL: @dont_vectorize_poison_phi( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[LOOP_HEADER:%.*]] |
| ; CHECK: loop.header: |
| ; CHECK-NEXT: [[POISON:%.*]] = phi i64 [ poison, [[ENTRY:%.*]] ], [ [[IV_INC:%.*]], [[IF_END:%.*]] ] |
| ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY]] ], [ [[IV_INC]], [[IF_END]] ] |
| ; CHECK-NEXT: [[I23:%.*]] = icmp eq i64 [[IV]], 0 |
| ; CHECK-NEXT: br i1 [[I23]], label [[IF_END]], label [[IF_THEN:%.*]] |
| ; CHECK: if.then: |
| ; CHECK-NEXT: [[I29:%.*]] = getelementptr inbounds float, float* [[INPUT:%.*]], i64 [[POISON]] |
| ; CHECK-NEXT: [[I30:%.*]] = load float, float* [[I29]], align 4, !invariant.load !0 |
| ; CHECK-NEXT: br label [[IF_END]] |
| ; CHECK: if.end: |
| ; CHECK-NEXT: [[I34:%.*]] = phi float [ 0.000000e+00, [[LOOP_HEADER]] ], [ [[I30]], [[IF_THEN]] ] |
| ; CHECK-NEXT: [[I35:%.*]] = getelementptr inbounds float, float* [[OUTPUT:%.*]], i64 [[IV]] |
| ; CHECK-NEXT: store float [[I34]], float* [[I35]], align 4 |
| ; CHECK-NEXT: [[IV_INC]] = add nuw nsw i64 [[IV]], 1 |
| ; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[IV_INC]], 4 |
| ; CHECK-NEXT: br i1 [[EXITCOND]], label [[LOOP_EXIT:%.*]], label [[LOOP_HEADER]] |
| ; CHECK: loop.exit: |
| ; CHECK-NEXT: ret void |
| ; |
| float* %output) local_unnamed_addr #0 { |
| entry: |
| br label %loop.header |
| |
| loop.header: |
| %poison = phi i64 [ poison, %entry ], [ %iv.inc, %if.end ] |
| %iv = phi i64 [ 0, %entry ], [ %iv.inc, %if.end ] |
| %i23 = icmp eq i64 %iv, 0 |
| br i1 %i23, label %if.end, label %if.then |
| |
| if.then: |
| %i29 = getelementptr inbounds float, float* %input, i64 %poison |
| %i30 = load float, float* %i29, align 4, !invariant.load !0 |
| br label %if.end |
| |
| if.end: |
| %i34 = phi float [ 0.000000e+00, %loop.header ], [ %i30, %if.then ] |
| %i35 = getelementptr inbounds float, float* %output, i64 %iv |
| store float %i34, float* %i35, align 4 |
| %iv.inc = add nuw nsw i64 %iv, 1 |
| %exitcond = icmp eq i64 %iv.inc, 4 |
| br i1 %exitcond, label %loop.exit, label %loop.header |
| |
| loop.exit: |
| ret void |
| } |
| |
| attributes #0 = { noinline nounwind uwtable "target-features"="+avx512bw,+avx512cd,+avx512dq,+avx512f,+avx512vl" } |
| |
| !0 = !{} |
