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llvm-project/llvm/test/Transforms/LoopVectorize/X86/float-induction-x86.ll
Nikita Popov 0a41e7c87e
[LICM] Do not reassociate constant offset GEP (#151492) 
LICM tries to reassociate GEPs in order to hoist an invariant GEP.
Currently, it also does this in the case where the GEP has a constant
offset.

This is usually undesirable. From a back-end perspective, constant GEPs
are usually free because they can be folded into addressing modes, so
this just increases register pressume. From a middle-end perspective,
keeping constant offsets last in the chain makes it easier to analyze
the relationship between multiple GEPs on the same base, especially
after CSE.

The worst that can happen here is if we start with something like

```
loop {
   p + 4*x
   p + 4*x + 1
   p + 4*x + 2
   p + 4*x + 3
}
```

And LICM converts it into:

```
p.1 = p + 1
p.2 = p + 2
p.3 = p + 3
loop {
   p + 4*x
   p.1 + 4*x
   p.2 + 4*x
   p.3 + 4*x
}
```

Which is much worse than leaving it for CSE to convert to:
```
loop {
   p2 = p + 4*x
   p2 + 1
   p2 + 2
   p2 + 3
}
```
2025-08-01 09:43:15 +02:00

505 lines
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LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes="default<O3>,simplifycfg" -simplifycfg-require-and-preserve-domtree=1 -keep-loops=false -mcpu=core-avx2 -mtriple=x86_64-unknown-linux-gnu -S | FileCheck --check-prefix AUTO_VEC %s
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
; This test checks auto-vectorization with FP induction variable.
; FMF is required on the IR instructions.
;void fp_iv_loop1(ptr __restrict__ A, int N) {
; float x = 1.0;
; for (int i=0; i < N; ++i) {
; A[i] = x;
; x += 0.5;
; }
;}
define void @fp_iv_loop1(ptr noalias nocapture %A, i32 %N) #0 {
; AUTO_VEC-LABEL: @fp_iv_loop1(
; AUTO_VEC-NEXT: entry:
; AUTO_VEC-NEXT: [[CMP4:%.*]] = icmp sgt i32 [[N:%.*]], 0
; AUTO_VEC-NEXT: br i1 [[CMP4]], label [[ITER_CHECK:%.*]], label [[FOR_END:%.*]]
; AUTO_VEC: iter.check:
; AUTO_VEC-NEXT: [[ZEXT:%.*]] = zext nneg i32 [[N]] to i64
; AUTO_VEC-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[N]], 4
; AUTO_VEC-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[FOR_BODY:%.*]], label [[VECTOR_MAIN_LOOP_ITER_CHECK:%.*]]
; AUTO_VEC: vector.main.loop.iter.check:
; AUTO_VEC-NEXT: [[MIN_ITERS_CHECK1:%.*]] = icmp ult i32 [[N]], 32
; AUTO_VEC-NEXT: br i1 [[MIN_ITERS_CHECK1]], label [[VEC_EPILOG_PH:%.*]], label [[VECTOR_PH:%.*]]
; AUTO_VEC: vector.ph:
; AUTO_VEC-NEXT: [[N_VEC:%.*]] = and i64 [[ZEXT]], 2147483616
; AUTO_VEC-NEXT: [[DOTCAST:%.*]] = uitofp nneg i64 [[N_VEC]] to float
; AUTO_VEC-NEXT: [[TMP0:%.*]] = fmul fast float [[DOTCAST]], 5.000000e-01
; AUTO_VEC-NEXT: [[IND_END:%.*]] = fadd fast float [[TMP0]], 1.000000e+00
; AUTO_VEC-NEXT: br label [[VECTOR_BODY:%.*]]
; AUTO_VEC: vector.body:
; AUTO_VEC-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; AUTO_VEC-NEXT: [[VEC_IND:%.*]] = phi <8 x float> [ <float 1.000000e+00, float 1.500000e+00, float 2.000000e+00, float 2.500000e+00, float 3.000000e+00, float 3.500000e+00, float 4.000000e+00, float 4.500000e+00>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; AUTO_VEC-NEXT: [[STEP_ADD:%.*]] = fadd fast <8 x float> [[VEC_IND]], splat (float 4.000000e+00)
; AUTO_VEC-NEXT: [[STEP_ADD2:%.*]] = fadd fast <8 x float> [[VEC_IND]], splat (float 8.000000e+00)
; AUTO_VEC-NEXT: [[STEP_ADD3:%.*]] = fadd fast <8 x float> [[VEC_IND]], splat (float 1.200000e+01)
; AUTO_VEC-NEXT: [[TMP1:%.*]] = getelementptr inbounds nuw float, ptr [[A:%.*]], i64 [[INDEX]]
; AUTO_VEC-NEXT: [[TMP2:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP1]], i64 32
; AUTO_VEC-NEXT: [[TMP3:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP1]], i64 64
; AUTO_VEC-NEXT: [[TMP4:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP1]], i64 96
; AUTO_VEC-NEXT: store <8 x float> [[VEC_IND]], ptr [[TMP1]], align 4
; AUTO_VEC-NEXT: store <8 x float> [[STEP_ADD]], ptr [[TMP2]], align 4
; AUTO_VEC-NEXT: store <8 x float> [[STEP_ADD2]], ptr [[TMP3]], align 4
; AUTO_VEC-NEXT: store <8 x float> [[STEP_ADD3]], ptr [[TMP4]], align 4
; AUTO_VEC-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 32
; AUTO_VEC-NEXT: [[VEC_IND_NEXT]] = fadd fast <8 x float> [[VEC_IND]], splat (float 1.600000e+01)
; AUTO_VEC-NEXT: [[TMP5:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; AUTO_VEC-NEXT: br i1 [[TMP5]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; AUTO_VEC: middle.block:
; AUTO_VEC-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N_VEC]], [[ZEXT]]
; AUTO_VEC-NEXT: br i1 [[CMP_N]], label [[FOR_END]], label [[VEC_EPILOG_ITER_CHECK:%.*]]
; AUTO_VEC: vec.epilog.iter.check:
; AUTO_VEC-NEXT: [[DOTCAST7:%.*]] = uitofp nneg i64 [[N_VEC]] to float
; AUTO_VEC-NEXT: [[TMP6:%.*]] = fmul fast float [[DOTCAST7]], 5.000000e-01
; AUTO_VEC-NEXT: [[IND_END8:%.*]] = fadd fast float [[TMP6]], 1.000000e+00
; AUTO_VEC-NEXT: [[N_VEC_REMAINING:%.*]] = and i64 [[ZEXT]], 28
; AUTO_VEC-NEXT: [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp eq i64 [[N_VEC_REMAINING]], 0
; AUTO_VEC-NEXT: br i1 [[MIN_EPILOG_ITERS_CHECK]], label [[FOR_BODY]], label [[VEC_EPILOG_PH]]
; AUTO_VEC: vec.epilog.ph:
; AUTO_VEC-NEXT: [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; AUTO_VEC-NEXT: [[BC_RESUME_VAL:%.*]] = phi float [ [[IND_END]], [[VEC_EPILOG_ITER_CHECK]] ], [ 1.000000e+00, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; AUTO_VEC-NEXT: [[N_VEC3:%.*]] = and i64 [[ZEXT]], 2147483644
; AUTO_VEC-NEXT: [[DOTCAST5:%.*]] = uitofp nneg i64 [[N_VEC3]] to float
; AUTO_VEC-NEXT: [[TMP7:%.*]] = fmul fast float [[DOTCAST5]], 5.000000e-01
; AUTO_VEC-NEXT: [[IND_END6:%.*]] = fadd fast float [[TMP7]], 1.000000e+00
; AUTO_VEC-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <4 x float> poison, float [[BC_RESUME_VAL]], i64 0
; AUTO_VEC-NEXT: [[DOTSPLAT:%.*]] = shufflevector <4 x float> [[DOTSPLATINSERT]], <4 x float> poison, <4 x i32> zeroinitializer
; AUTO_VEC-NEXT: [[INDUCTION:%.*]] = fadd fast <4 x float> [[DOTSPLAT]], <float 0.000000e+00, float 5.000000e-01, float 1.000000e+00, float 1.500000e+00>
; AUTO_VEC-NEXT: br label [[VEC_EPILOG_VECTOR_BODY:%.*]]
; AUTO_VEC: vec.epilog.vector.body:
; AUTO_VEC-NEXT: [[INDEX10:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], [[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT13:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; AUTO_VEC-NEXT: [[VEC_IND11:%.*]] = phi <4 x float> [ [[INDUCTION]], [[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT12:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; AUTO_VEC-NEXT: [[TMP8:%.*]] = getelementptr inbounds nuw float, ptr [[A]], i64 [[INDEX10]]
; AUTO_VEC-NEXT: store <4 x float> [[VEC_IND11]], ptr [[TMP8]], align 4
; AUTO_VEC-NEXT: [[INDEX_NEXT13]] = add nuw i64 [[INDEX10]], 4
; AUTO_VEC-NEXT: [[VEC_IND_NEXT12]] = fadd fast <4 x float> [[VEC_IND11]], splat (float 2.000000e+00)
; AUTO_VEC-NEXT: [[TMP9:%.*]] = icmp eq i64 [[INDEX_NEXT13]], [[N_VEC3]]
; AUTO_VEC-NEXT: br i1 [[TMP9]], label [[VEC_EPILOG_MIDDLE_BLOCK:%.*]], label [[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
; AUTO_VEC: vec.epilog.middle.block:
; AUTO_VEC-NEXT: [[CMP_N14:%.*]] = icmp eq i64 [[N_VEC3]], [[ZEXT]]
; AUTO_VEC-NEXT: br i1 [[CMP_N14]], label [[FOR_END]], label [[FOR_BODY]]
; AUTO_VEC: for.body:
; AUTO_VEC-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ], [ 0, [[ITER_CHECK]] ], [ [[N_VEC]], [[VEC_EPILOG_ITER_CHECK]] ], [ [[N_VEC3]], [[VEC_EPILOG_MIDDLE_BLOCK]] ]
; AUTO_VEC-NEXT: [[X_06:%.*]] = phi float [ [[CONV1:%.*]], [[FOR_BODY]] ], [ 1.000000e+00, [[ITER_CHECK]] ], [ [[IND_END8]], [[VEC_EPILOG_ITER_CHECK]] ], [ [[IND_END6]], [[VEC_EPILOG_MIDDLE_BLOCK]] ]
; AUTO_VEC-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds nuw float, ptr [[A]], i64 [[INDVARS_IV]]
; AUTO_VEC-NEXT: store float [[X_06]], ptr [[ARRAYIDX]], align 4
; AUTO_VEC-NEXT: [[CONV1]] = fadd fast float [[X_06]], 5.000000e-01
; AUTO_VEC-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; AUTO_VEC-NEXT: [[TMP10:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], [[ZEXT]]
; AUTO_VEC-NEXT: br i1 [[TMP10]], label [[FOR_END]], label [[FOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
; AUTO_VEC: for.end:
; AUTO_VEC-NEXT: ret void
;
entry:
%cmp4 = icmp sgt i32 %N, 0
br i1 %cmp4, label %for.body.preheader, label %for.end
for.body.preheader: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.preheader, %for.body
%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ]
%x.06 = phi float [ %conv1, %for.body ], [ 1.000000e+00, %for.body.preheader ]
%arrayidx = getelementptr inbounds float, ptr %A, i64 %indvars.iv
store float %x.06, ptr %arrayidx, align 4
%conv1 = fadd fast float %x.06, 5.000000e-01
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, %N
br i1 %exitcond, label %for.end.loopexit, label %for.body
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
ret void
}
; The same as the previous, but FP operation has no FMF.
; Vectorization should be rejected.
;void fp_iv_loop2(ptr __restrict__ A, int N) {
; float x = 1.0;
; for (int i=0; i < N; ++i) {
; A[i] = x;
; x += 0.5;
; }
;}
define void @fp_iv_loop2(ptr noalias nocapture %A, i32 %N) {
; AUTO_VEC-LABEL: @fp_iv_loop2(
; AUTO_VEC-NEXT: entry:
; AUTO_VEC-NEXT: [[CMP4:%.*]] = icmp sgt i32 [[N:%.*]], 0
; AUTO_VEC-NEXT: br i1 [[CMP4]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_END:%.*]]
; AUTO_VEC: for.body.preheader:
; AUTO_VEC-NEXT: [[ZEXT:%.*]] = zext nneg i32 [[N]] to i64
; AUTO_VEC-NEXT: [[XTRAITER:%.*]] = and i64 [[ZEXT]], 7
; AUTO_VEC-NEXT: [[TMP0:%.*]] = icmp ult i32 [[N]], 8
; AUTO_VEC-NEXT: br i1 [[TMP0]], label [[FOR_END_LOOPEXIT_UNR_LCSSA:%.*]], label [[FOR_BODY_PREHEADER_NEW:%.*]]
; AUTO_VEC: for.body.preheader.new:
; AUTO_VEC-NEXT: [[UNROLL_ITER:%.*]] = and i64 [[ZEXT]], 2147483640
; AUTO_VEC-NEXT: br label [[FOR_BODY:%.*]]
; AUTO_VEC: for.body:
; AUTO_VEC-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER_NEW]] ], [ [[INDVARS_IV_NEXT_7:%.*]], [[FOR_BODY]] ]
; AUTO_VEC-NEXT: [[X_06:%.*]] = phi float [ 1.000000e+00, [[FOR_BODY_PREHEADER_NEW]] ], [ [[CONV1_7:%.*]], [[FOR_BODY]] ]
; AUTO_VEC-NEXT: [[NITER:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER_NEW]] ], [ [[NITER_NEXT_7:%.*]], [[FOR_BODY]] ]
; AUTO_VEC-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds nuw float, ptr [[A:%.*]], i64 [[INDVARS_IV]]
; AUTO_VEC-NEXT: store float [[X_06]], ptr [[ARRAYIDX]], align 4
; AUTO_VEC-NEXT: [[CONV1:%.*]] = fadd float [[X_06]], 5.000000e-01
; AUTO_VEC-NEXT: [[TMP1:%.*]] = getelementptr inbounds nuw float, ptr [[A]], i64 [[INDVARS_IV]]
; AUTO_VEC-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP1]], i64 4
; AUTO_VEC-NEXT: store float [[CONV1]], ptr [[ARRAYIDX_1]], align 4
; AUTO_VEC-NEXT: [[CONV1_1:%.*]] = fadd float [[CONV1]], 5.000000e-01
; AUTO_VEC-NEXT: [[TMP2:%.*]] = getelementptr inbounds nuw float, ptr [[A]], i64 [[INDVARS_IV]]
; AUTO_VEC-NEXT: [[ARRAYIDX_2:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP2]], i64 8
; AUTO_VEC-NEXT: store float [[CONV1_1]], ptr [[ARRAYIDX_2]], align 4
; AUTO_VEC-NEXT: [[CONV1_2:%.*]] = fadd float [[CONV1_1]], 5.000000e-01
; AUTO_VEC-NEXT: [[TMP3:%.*]] = getelementptr inbounds nuw float, ptr [[A]], i64 [[INDVARS_IV]]
; AUTO_VEC-NEXT: [[ARRAYIDX_3:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP3]], i64 12
; AUTO_VEC-NEXT: store float [[CONV1_2]], ptr [[ARRAYIDX_3]], align 4
; AUTO_VEC-NEXT: [[CONV1_3:%.*]] = fadd float [[CONV1_2]], 5.000000e-01
; AUTO_VEC-NEXT: [[TMP4:%.*]] = getelementptr inbounds nuw float, ptr [[A]], i64 [[INDVARS_IV]]
; AUTO_VEC-NEXT: [[ARRAYIDX_4:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP4]], i64 16
; AUTO_VEC-NEXT: store float [[CONV1_3]], ptr [[ARRAYIDX_4]], align 4
; AUTO_VEC-NEXT: [[CONV1_4:%.*]] = fadd float [[CONV1_3]], 5.000000e-01
; AUTO_VEC-NEXT: [[TMP5:%.*]] = getelementptr inbounds nuw float, ptr [[A]], i64 [[INDVARS_IV]]
; AUTO_VEC-NEXT: [[ARRAYIDX_5:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP5]], i64 20
; AUTO_VEC-NEXT: store float [[CONV1_4]], ptr [[ARRAYIDX_5]], align 4
; AUTO_VEC-NEXT: [[CONV1_5:%.*]] = fadd float [[CONV1_4]], 5.000000e-01
; AUTO_VEC-NEXT: [[TMP6:%.*]] = getelementptr inbounds nuw float, ptr [[A]], i64 [[INDVARS_IV]]
; AUTO_VEC-NEXT: [[ARRAYIDX_6:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP6]], i64 24
; AUTO_VEC-NEXT: store float [[CONV1_5]], ptr [[ARRAYIDX_6]], align 4
; AUTO_VEC-NEXT: [[CONV1_6:%.*]] = fadd float [[CONV1_5]], 5.000000e-01
; AUTO_VEC-NEXT: [[TMP7:%.*]] = getelementptr inbounds nuw float, ptr [[A]], i64 [[INDVARS_IV]]
; AUTO_VEC-NEXT: [[ARRAYIDX_7:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP7]], i64 28
; AUTO_VEC-NEXT: store float [[CONV1_6]], ptr [[ARRAYIDX_7]], align 4
; AUTO_VEC-NEXT: [[CONV1_7]] = fadd float [[CONV1_6]], 5.000000e-01
; AUTO_VEC-NEXT: [[INDVARS_IV_NEXT_7]] = add nuw nsw i64 [[INDVARS_IV]], 8
; AUTO_VEC-NEXT: [[NITER_NEXT_7]] = add i64 [[NITER]], 8
; AUTO_VEC-NEXT: [[NITER_NCMP_7:%.*]] = icmp eq i64 [[NITER_NEXT_7]], [[UNROLL_ITER]]
; AUTO_VEC-NEXT: br i1 [[NITER_NCMP_7]], label [[FOR_END_LOOPEXIT_UNR_LCSSA]], label [[FOR_BODY]]
; AUTO_VEC: for.end.loopexit.unr-lcssa:
; AUTO_VEC-NEXT: [[INDVARS_IV_UNR:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[INDVARS_IV_NEXT_7]], [[FOR_BODY]] ]
; AUTO_VEC-NEXT: [[X_06_UNR:%.*]] = phi float [ 1.000000e+00, [[FOR_BODY_PREHEADER]] ], [ [[CONV1_7]], [[FOR_BODY]] ]
; AUTO_VEC-NEXT: [[LCMP_MOD_NOT:%.*]] = icmp eq i64 [[XTRAITER]], 0
; AUTO_VEC-NEXT: br i1 [[LCMP_MOD_NOT]], label [[FOR_END]], label [[FOR_BODY_EPIL:%.*]]
; AUTO_VEC: for.body.epil:
; AUTO_VEC-NEXT: [[INDVARS_IV_EPIL:%.*]] = phi i64 [ [[INDVARS_IV_NEXT_EPIL:%.*]], [[FOR_BODY_EPIL]] ], [ [[INDVARS_IV_UNR]], [[FOR_END_LOOPEXIT_UNR_LCSSA]] ]
; AUTO_VEC-NEXT: [[X_06_EPIL:%.*]] = phi float [ [[CONV1_EPIL:%.*]], [[FOR_BODY_EPIL]] ], [ [[X_06_UNR]], [[FOR_END_LOOPEXIT_UNR_LCSSA]] ]
; AUTO_VEC-NEXT: [[EPIL_ITER:%.*]] = phi i64 [ [[EPIL_ITER_NEXT:%.*]], [[FOR_BODY_EPIL]] ], [ 0, [[FOR_END_LOOPEXIT_UNR_LCSSA]] ]
; AUTO_VEC-NEXT: [[ARRAYIDX_EPIL:%.*]] = getelementptr inbounds nuw float, ptr [[A]], i64 [[INDVARS_IV_EPIL]]
; AUTO_VEC-NEXT: store float [[X_06_EPIL]], ptr [[ARRAYIDX_EPIL]], align 4
; AUTO_VEC-NEXT: [[CONV1_EPIL]] = fadd float [[X_06_EPIL]], 5.000000e-01
; AUTO_VEC-NEXT: [[INDVARS_IV_NEXT_EPIL]] = add nuw nsw i64 [[INDVARS_IV_EPIL]], 1
; AUTO_VEC-NEXT: [[EPIL_ITER_NEXT]] = add i64 [[EPIL_ITER]], 1
; AUTO_VEC-NEXT: [[EPIL_ITER_CMP_NOT:%.*]] = icmp eq i64 [[EPIL_ITER_NEXT]], [[XTRAITER]]
; AUTO_VEC-NEXT: br i1 [[EPIL_ITER_CMP_NOT]], label [[FOR_END]], label [[FOR_BODY_EPIL]], !llvm.loop [[LOOP5:![0-9]+]]
; AUTO_VEC: for.end:
; AUTO_VEC-NEXT: ret void
;
entry:
%cmp4 = icmp sgt i32 %N, 0
br i1 %cmp4, label %for.body.preheader, label %for.end
for.body.preheader: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.preheader, %for.body
%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ]
%x.06 = phi float [ %conv1, %for.body ], [ 1.000000e+00, %for.body.preheader ]
%arrayidx = getelementptr inbounds float, ptr %A, i64 %indvars.iv
store float %x.06, ptr %arrayidx, align 4
%conv1 = fadd float %x.06, 5.000000e-01
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, %N
br i1 %exitcond, label %for.end.loopexit, label %for.body
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
ret void
}
define double @external_use_with_fast_math(ptr %a, i64 %n) {
; AUTO_VEC-LABEL: @external_use_with_fast_math(
; AUTO_VEC-NEXT: entry:
; AUTO_VEC-NEXT: [[SMAX:%.*]] = tail call i64 @llvm.smax.i64(i64 [[N:%.*]], i64 1)
; AUTO_VEC-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp slt i64 [[N]], 16
; AUTO_VEC-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[FOR_BODY:%.*]], label [[VECTOR_PH:%.*]]
; AUTO_VEC: vector.ph:
; AUTO_VEC-NEXT: [[N_VEC:%.*]] = and i64 [[SMAX]], 9223372036854775792
; AUTO_VEC-NEXT: [[DOTCAST:%.*]] = uitofp nneg i64 [[N_VEC]] to double
; AUTO_VEC-NEXT: [[TMP0:%.*]] = fmul fast double [[DOTCAST]], 3.000000e+00
; AUTO_VEC-NEXT: br label [[VECTOR_BODY:%.*]]
; AUTO_VEC: vector.body:
; AUTO_VEC-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; AUTO_VEC-NEXT: [[VEC_IND:%.*]] = phi <4 x double> [ <double 0.000000e+00, double 3.000000e+00, double 6.000000e+00, double 9.000000e+00>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; AUTO_VEC-NEXT: [[STEP_ADD:%.*]] = fadd fast <4 x double> [[VEC_IND]], splat (double 1.200000e+01)
; AUTO_VEC-NEXT: [[STEP_ADD_2:%.*]] = fadd fast <4 x double> [[VEC_IND]], splat (double 2.400000e+01)
; AUTO_VEC-NEXT: [[STEP_ADD_3:%.*]] = fadd fast <4 x double> [[VEC_IND]], splat (double 3.600000e+01)
; AUTO_VEC-NEXT: [[TMP1:%.*]] = getelementptr double, ptr [[A:%.*]], i64 [[INDEX]]
; AUTO_VEC-NEXT: [[TMP2:%.*]] = getelementptr i8, ptr [[TMP1]], i64 32
; AUTO_VEC-NEXT: [[TMP3:%.*]] = getelementptr i8, ptr [[TMP1]], i64 64
; AUTO_VEC-NEXT: [[TMP4:%.*]] = getelementptr i8, ptr [[TMP1]], i64 96
; AUTO_VEC-NEXT: store <4 x double> [[VEC_IND]], ptr [[TMP1]], align 8
; AUTO_VEC-NEXT: store <4 x double> [[STEP_ADD]], ptr [[TMP2]], align 8
; AUTO_VEC-NEXT: store <4 x double> [[STEP_ADD_2]], ptr [[TMP3]], align 8
; AUTO_VEC-NEXT: store <4 x double> [[STEP_ADD_3]], ptr [[TMP4]], align 8
; AUTO_VEC-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 16
; AUTO_VEC-NEXT: [[VEC_IND_NEXT]] = fadd fast <4 x double> [[VEC_IND]], splat (double 4.800000e+01)
; AUTO_VEC-NEXT: [[TMP5:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; AUTO_VEC-NEXT: br i1 [[TMP5]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP7:![0-9]+]]
; AUTO_VEC: middle.block:
; AUTO_VEC-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[SMAX]], [[N_VEC]]
; AUTO_VEC-NEXT: [[IND_ESCAPE:%.*]] = fadd fast double [[TMP0]], -3.000000e+00
; AUTO_VEC-NEXT: br i1 [[CMP_N]], label [[FOR_END:%.*]], label [[FOR_BODY]]
; AUTO_VEC: for.body:
; AUTO_VEC-NEXT: [[I:%.*]] = phi i64 [ [[I_NEXT:%.*]], [[FOR_BODY]] ], [ 0, [[ENTRY:%.*]] ], [ [[N_VEC]], [[MIDDLE_BLOCK]] ]
; AUTO_VEC-NEXT: [[J:%.*]] = phi double [ [[J_NEXT:%.*]], [[FOR_BODY]] ], [ 0.000000e+00, [[ENTRY]] ], [ [[TMP0]], [[MIDDLE_BLOCK]] ]
; AUTO_VEC-NEXT: [[T0:%.*]] = getelementptr double, ptr [[A]], i64 [[I]]
; AUTO_VEC-NEXT: store double [[J]], ptr [[T0]], align 8
; AUTO_VEC-NEXT: [[I_NEXT]] = add nuw nsw i64 [[I]], 1
; AUTO_VEC-NEXT: [[J_NEXT]] = fadd fast double [[J]], 3.000000e+00
; AUTO_VEC-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[I_NEXT]], [[SMAX]]
; AUTO_VEC-NEXT: br i1 [[EXITCOND_NOT]], label [[FOR_END]], label [[FOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]]
; AUTO_VEC: for.end:
; AUTO_VEC-NEXT: [[J_LCSSA:%.*]] = phi double [ [[IND_ESCAPE]], [[MIDDLE_BLOCK]] ], [ [[J]], [[FOR_BODY]] ]
; AUTO_VEC-NEXT: ret double [[J_LCSSA]]
;
entry:
br label %for.body
for.body:
%i = phi i64 [ 0, %entry ], [%i.next, %for.body]
%j = phi double [ 0.0, %entry ], [ %j.next, %for.body ]
%t0 = getelementptr double, ptr %a, i64 %i
store double %j, ptr %t0
%i.next = add i64 %i, 1
%j.next = fadd fast double %j, 3.0
%cond = icmp slt i64 %i.next, %n
br i1 %cond, label %for.body, label %for.end
for.end:
%t1 = phi double [ %j, %for.body ]
ret double %t1
}
define double @external_use_without_fast_math(ptr %a, i64 %n) {
; AUTO_VEC-LABEL: @external_use_without_fast_math(
; AUTO_VEC-NEXT: entry:
; AUTO_VEC-NEXT: [[SMAX:%.*]] = tail call i64 @llvm.smax.i64(i64 [[N:%.*]], i64 1)
; AUTO_VEC-NEXT: [[XTRAITER:%.*]] = and i64 [[SMAX]], 7
; AUTO_VEC-NEXT: [[TMP0:%.*]] = icmp slt i64 [[N]], 8
; AUTO_VEC-NEXT: br i1 [[TMP0]], label [[FOR_END_UNR_LCSSA:%.*]], label [[ENTRY_NEW:%.*]]
; AUTO_VEC: entry.new:
; AUTO_VEC-NEXT: [[UNROLL_ITER:%.*]] = and i64 [[SMAX]], 9223372036854775800
; AUTO_VEC-NEXT: br label [[FOR_BODY:%.*]]
; AUTO_VEC: for.body:
; AUTO_VEC-NEXT: [[I:%.*]] = phi i64 [ 0, [[ENTRY_NEW]] ], [ [[I_NEXT_7:%.*]], [[FOR_BODY]] ]
; AUTO_VEC-NEXT: [[J:%.*]] = phi double [ 0.000000e+00, [[ENTRY_NEW]] ], [ [[J_NEXT_7:%.*]], [[FOR_BODY]] ]
; AUTO_VEC-NEXT: [[NITER:%.*]] = phi i64 [ 0, [[ENTRY_NEW]] ], [ [[NITER_NEXT_7:%.*]], [[FOR_BODY]] ]
; AUTO_VEC-NEXT: [[T0:%.*]] = getelementptr double, ptr [[A:%.*]], i64 [[I]]
; AUTO_VEC-NEXT: store double [[J]], ptr [[T0]], align 8
; AUTO_VEC-NEXT: [[J_NEXT:%.*]] = fadd double [[J]], 3.000000e+00
; AUTO_VEC-NEXT: [[TMP1:%.*]] = getelementptr double, ptr [[A]], i64 [[I]]
; AUTO_VEC-NEXT: [[T0_1:%.*]] = getelementptr i8, ptr [[TMP1]], i64 8
; AUTO_VEC-NEXT: store double [[J_NEXT]], ptr [[T0_1]], align 8
; AUTO_VEC-NEXT: [[J_NEXT_1:%.*]] = fadd double [[J_NEXT]], 3.000000e+00
; AUTO_VEC-NEXT: [[TMP2:%.*]] = getelementptr double, ptr [[A]], i64 [[I]]
; AUTO_VEC-NEXT: [[T0_2:%.*]] = getelementptr i8, ptr [[TMP2]], i64 16
; AUTO_VEC-NEXT: store double [[J_NEXT_1]], ptr [[T0_2]], align 8
; AUTO_VEC-NEXT: [[J_NEXT_2:%.*]] = fadd double [[J_NEXT_1]], 3.000000e+00
; AUTO_VEC-NEXT: [[TMP3:%.*]] = getelementptr double, ptr [[A]], i64 [[I]]
; AUTO_VEC-NEXT: [[T0_3:%.*]] = getelementptr i8, ptr [[TMP3]], i64 24
; AUTO_VEC-NEXT: store double [[J_NEXT_2]], ptr [[T0_3]], align 8
; AUTO_VEC-NEXT: [[J_NEXT_3:%.*]] = fadd double [[J_NEXT_2]], 3.000000e+00
; AUTO_VEC-NEXT: [[TMP4:%.*]] = getelementptr double, ptr [[A]], i64 [[I]]
; AUTO_VEC-NEXT: [[T0_4:%.*]] = getelementptr i8, ptr [[TMP4]], i64 32
; AUTO_VEC-NEXT: store double [[J_NEXT_3]], ptr [[T0_4]], align 8
; AUTO_VEC-NEXT: [[J_NEXT_4:%.*]] = fadd double [[J_NEXT_3]], 3.000000e+00
; AUTO_VEC-NEXT: [[TMP5:%.*]] = getelementptr double, ptr [[A]], i64 [[I]]
; AUTO_VEC-NEXT: [[T0_5:%.*]] = getelementptr i8, ptr [[TMP5]], i64 40
; AUTO_VEC-NEXT: store double [[J_NEXT_4]], ptr [[T0_5]], align 8
; AUTO_VEC-NEXT: [[J_NEXT_5:%.*]] = fadd double [[J_NEXT_4]], 3.000000e+00
; AUTO_VEC-NEXT: [[TMP6:%.*]] = getelementptr double, ptr [[A]], i64 [[I]]
; AUTO_VEC-NEXT: [[T0_6:%.*]] = getelementptr i8, ptr [[TMP6]], i64 48
; AUTO_VEC-NEXT: store double [[J_NEXT_5]], ptr [[T0_6]], align 8
; AUTO_VEC-NEXT: [[J_NEXT_6:%.*]] = fadd double [[J_NEXT_5]], 3.000000e+00
; AUTO_VEC-NEXT: [[TMP7:%.*]] = getelementptr double, ptr [[A]], i64 [[I]]
; AUTO_VEC-NEXT: [[T0_7:%.*]] = getelementptr i8, ptr [[TMP7]], i64 56
; AUTO_VEC-NEXT: store double [[J_NEXT_6]], ptr [[T0_7]], align 8
; AUTO_VEC-NEXT: [[I_NEXT_7]] = add nuw nsw i64 [[I]], 8
; AUTO_VEC-NEXT: [[J_NEXT_7]] = fadd double [[J_NEXT_6]], 3.000000e+00
; AUTO_VEC-NEXT: [[NITER_NEXT_7]] = add i64 [[NITER]], 8
; AUTO_VEC-NEXT: [[NITER_NCMP_7:%.*]] = icmp eq i64 [[NITER_NEXT_7]], [[UNROLL_ITER]]
; AUTO_VEC-NEXT: br i1 [[NITER_NCMP_7]], label [[FOR_END_UNR_LCSSA]], label [[FOR_BODY]]
; AUTO_VEC: for.end.unr-lcssa:
; AUTO_VEC-NEXT: [[J_LCSSA_PH:%.*]] = phi double [ poison, [[ENTRY:%.*]] ], [ [[J_NEXT_6]], [[FOR_BODY]] ]
; AUTO_VEC-NEXT: [[I_UNR:%.*]] = phi i64 [ 0, [[ENTRY]] ], [ [[I_NEXT_7]], [[FOR_BODY]] ]
; AUTO_VEC-NEXT: [[J_UNR:%.*]] = phi double [ 0.000000e+00, [[ENTRY]] ], [ [[J_NEXT_7]], [[FOR_BODY]] ]
; AUTO_VEC-NEXT: [[LCMP_MOD_NOT:%.*]] = icmp eq i64 [[XTRAITER]], 0
; AUTO_VEC-NEXT: br i1 [[LCMP_MOD_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY_EPIL:%.*]]
; AUTO_VEC: for.body.epil:
; AUTO_VEC-NEXT: [[I_EPIL:%.*]] = phi i64 [ [[I_NEXT_EPIL:%.*]], [[FOR_BODY_EPIL]] ], [ [[I_UNR]], [[FOR_END_UNR_LCSSA]] ]
; AUTO_VEC-NEXT: [[J_EPIL:%.*]] = phi double [ [[J_NEXT_EPIL:%.*]], [[FOR_BODY_EPIL]] ], [ [[J_UNR]], [[FOR_END_UNR_LCSSA]] ]
; AUTO_VEC-NEXT: [[EPIL_ITER:%.*]] = phi i64 [ [[EPIL_ITER_NEXT:%.*]], [[FOR_BODY_EPIL]] ], [ 0, [[FOR_END_UNR_LCSSA]] ]
; AUTO_VEC-NEXT: [[T0_EPIL:%.*]] = getelementptr double, ptr [[A]], i64 [[I_EPIL]]
; AUTO_VEC-NEXT: store double [[J_EPIL]], ptr [[T0_EPIL]], align 8
; AUTO_VEC-NEXT: [[I_NEXT_EPIL]] = add nuw nsw i64 [[I_EPIL]], 1
; AUTO_VEC-NEXT: [[J_NEXT_EPIL]] = fadd double [[J_EPIL]], 3.000000e+00
; AUTO_VEC-NEXT: [[EPIL_ITER_NEXT]] = add i64 [[EPIL_ITER]], 1
; AUTO_VEC-NEXT: [[EPIL_ITER_CMP_NOT:%.*]] = icmp eq i64 [[EPIL_ITER_NEXT]], [[XTRAITER]]
; AUTO_VEC-NEXT: br i1 [[EPIL_ITER_CMP_NOT]], label [[FOR_END]], label [[FOR_BODY_EPIL]], !llvm.loop [[LOOP9:![0-9]+]]
; AUTO_VEC: for.end:
; AUTO_VEC-NEXT: [[J_LCSSA:%.*]] = phi double [ [[J_LCSSA_PH]], [[FOR_END_UNR_LCSSA]] ], [ [[J_EPIL]], [[FOR_BODY_EPIL]] ]
; AUTO_VEC-NEXT: ret double [[J_LCSSA]]
;
entry:
br label %for.body
for.body:
%i = phi i64 [ 0, %entry ], [%i.next, %for.body]
%j = phi double [ 0.0, %entry ], [ %j.next, %for.body ]
%t0 = getelementptr double, ptr %a, i64 %i
store double %j, ptr %t0
%i.next = add i64 %i, 1
%j.next = fadd double %j, 3.0
%cond = icmp slt i64 %i.next, %n
br i1 %cond, label %for.body, label %for.end
for.end:
%t1 = phi double [ %j, %for.body ]
ret double %t1
}
;; void fadd_induction(ptr p, unsigned N) {
;; float x = 1.0f;
;; for (unsigned i=0; i!=N; ++i) {
;; p[i] = p[i] + x;
;; x += 42.0f;
;; }
;; }
define void @fadd_reassoc_FMF(ptr nocapture %p, i32 %N) {
; AUTO_VEC-LABEL: @fadd_reassoc_FMF(
; AUTO_VEC-NEXT: entry:
; AUTO_VEC-NEXT: [[CMP_NOT11:%.*]] = icmp eq i32 [[N:%.*]], 0
; AUTO_VEC-NEXT: br i1 [[CMP_NOT11]], label [[FOR_COND_CLEANUP:%.*]], label [[ITER_CHECK:%.*]]
; AUTO_VEC: iter.check:
; AUTO_VEC-NEXT: [[TMP0:%.*]] = zext i32 [[N]] to i64
; AUTO_VEC-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[N]], 4
; AUTO_VEC-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[FOR_BODY:%.*]], label [[VECTOR_MAIN_LOOP_ITER_CHECK:%.*]]
; AUTO_VEC: vector.main.loop.iter.check:
; AUTO_VEC-NEXT: [[MIN_ITERS_CHECK1:%.*]] = icmp ult i32 [[N]], 32
; AUTO_VEC-NEXT: br i1 [[MIN_ITERS_CHECK1]], label [[VEC_EPILOG_PH:%.*]], label [[VECTOR_PH:%.*]]
; AUTO_VEC: vector.ph:
; AUTO_VEC-NEXT: [[N_VEC:%.*]] = and i64 [[TMP0]], 4294967264
; AUTO_VEC-NEXT: [[DOTCAST:%.*]] = uitofp nneg i64 [[N_VEC]] to float
; AUTO_VEC-NEXT: [[TMP1:%.*]] = fmul reassoc float [[DOTCAST]], 4.200000e+01
; AUTO_VEC-NEXT: [[IND_END:%.*]] = fadd reassoc float [[TMP1]], 1.000000e+00
; AUTO_VEC-NEXT: br label [[VECTOR_BODY:%.*]]
; AUTO_VEC: vector.body:
; AUTO_VEC-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; AUTO_VEC-NEXT: [[VEC_IND:%.*]] = phi <8 x float> [ <float 1.000000e+00, float 4.300000e+01, float 8.500000e+01, float 1.270000e+02, float 1.690000e+02, float 2.110000e+02, float 2.530000e+02, float 2.950000e+02>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; AUTO_VEC-NEXT: [[STEP_ADD:%.*]] = fadd reassoc <8 x float> [[VEC_IND]], splat (float 3.360000e+02)
; AUTO_VEC-NEXT: [[STEP_ADD2:%.*]] = fadd reassoc <8 x float> [[STEP_ADD]], splat (float 3.360000e+02)
; AUTO_VEC-NEXT: [[STEP_ADD3:%.*]] = fadd reassoc <8 x float> [[STEP_ADD2]], splat (float 3.360000e+02)
; AUTO_VEC-NEXT: [[TMP2:%.*]] = getelementptr inbounds nuw float, ptr [[P:%.*]], i64 [[INDEX]]
; AUTO_VEC-NEXT: [[TMP3:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP2]], i64 32
; AUTO_VEC-NEXT: [[TMP4:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP2]], i64 64
; AUTO_VEC-NEXT: [[TMP5:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP2]], i64 96
; AUTO_VEC-NEXT: [[WIDE_LOAD:%.*]] = load <8 x float>, ptr [[TMP2]], align 4
; AUTO_VEC-NEXT: [[WIDE_LOAD2:%.*]] = load <8 x float>, ptr [[TMP3]], align 4
; AUTO_VEC-NEXT: [[WIDE_LOAD3:%.*]] = load <8 x float>, ptr [[TMP4]], align 4
; AUTO_VEC-NEXT: [[WIDE_LOAD4:%.*]] = load <8 x float>, ptr [[TMP5]], align 4
; AUTO_VEC-NEXT: [[TMP6:%.*]] = fadd reassoc <8 x float> [[VEC_IND]], [[WIDE_LOAD]]
; AUTO_VEC-NEXT: [[TMP7:%.*]] = fadd reassoc <8 x float> [[STEP_ADD]], [[WIDE_LOAD2]]
; AUTO_VEC-NEXT: [[TMP8:%.*]] = fadd reassoc <8 x float> [[STEP_ADD2]], [[WIDE_LOAD3]]
; AUTO_VEC-NEXT: [[TMP9:%.*]] = fadd reassoc <8 x float> [[STEP_ADD3]], [[WIDE_LOAD4]]
; AUTO_VEC-NEXT: store <8 x float> [[TMP6]], ptr [[TMP2]], align 4
; AUTO_VEC-NEXT: store <8 x float> [[TMP7]], ptr [[TMP3]], align 4
; AUTO_VEC-NEXT: store <8 x float> [[TMP8]], ptr [[TMP4]], align 4
; AUTO_VEC-NEXT: store <8 x float> [[TMP9]], ptr [[TMP5]], align 4
; AUTO_VEC-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 32
; AUTO_VEC-NEXT: [[VEC_IND_NEXT]] = fadd reassoc <8 x float> [[STEP_ADD3]], splat (float 3.360000e+02)
; AUTO_VEC-NEXT: [[TMP10:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; AUTO_VEC-NEXT: br i1 [[TMP10]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP10:![0-9]+]]
; AUTO_VEC: middle.block:
; AUTO_VEC-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N_VEC]], [[TMP0]]
; AUTO_VEC-NEXT: br i1 [[CMP_N]], label [[FOR_COND_CLEANUP]], label [[VEC_EPILOG_ITER_CHECK:%.*]]
; AUTO_VEC: vec.epilog.iter.check:
; AUTO_VEC-NEXT: [[DOTCAST10:%.*]] = uitofp nneg i64 [[N_VEC]] to float
; AUTO_VEC-NEXT: [[TMP11:%.*]] = fmul reassoc float [[DOTCAST10]], 4.200000e+01
; AUTO_VEC-NEXT: [[IND_END11:%.*]] = fadd reassoc float [[TMP11]], 1.000000e+00
; AUTO_VEC-NEXT: [[N_VEC_REMAINING:%.*]] = and i64 [[TMP0]], 28
; AUTO_VEC-NEXT: [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp eq i64 [[N_VEC_REMAINING]], 0
; AUTO_VEC-NEXT: br i1 [[MIN_EPILOG_ITERS_CHECK]], label [[FOR_BODY]], label [[VEC_EPILOG_PH]]
; AUTO_VEC: vec.epilog.ph:
; AUTO_VEC-NEXT: [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; AUTO_VEC-NEXT: [[BC_RESUME_VAL:%.*]] = phi float [ [[IND_END]], [[VEC_EPILOG_ITER_CHECK]] ], [ 1.000000e+00, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; AUTO_VEC-NEXT: [[N_VEC6:%.*]] = and i64 [[TMP0]], 4294967292
; AUTO_VEC-NEXT: [[DOTCAST8:%.*]] = uitofp nneg i64 [[N_VEC6]] to float
; AUTO_VEC-NEXT: [[TMP12:%.*]] = fmul reassoc float [[DOTCAST8]], 4.200000e+01
; AUTO_VEC-NEXT: [[IND_END9:%.*]] = fadd reassoc float [[TMP12]], 1.000000e+00
; AUTO_VEC-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <4 x float> poison, float [[BC_RESUME_VAL]], i64 0
; AUTO_VEC-NEXT: [[DOTSPLAT:%.*]] = shufflevector <4 x float> [[DOTSPLATINSERT]], <4 x float> poison, <4 x i32> zeroinitializer
; AUTO_VEC-NEXT: [[INDUCTION:%.*]] = fadd reassoc <4 x float> [[DOTSPLAT]], <float 0.000000e+00, float 4.200000e+01, float 8.400000e+01, float 1.260000e+02>
; AUTO_VEC-NEXT: br label [[VEC_EPILOG_VECTOR_BODY:%.*]]
; AUTO_VEC: vec.epilog.vector.body:
; AUTO_VEC-NEXT: [[INDEX13:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], [[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT17:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; AUTO_VEC-NEXT: [[VEC_IND14:%.*]] = phi <4 x float> [ [[INDUCTION]], [[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT15:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; AUTO_VEC-NEXT: [[TMP13:%.*]] = getelementptr inbounds nuw float, ptr [[P]], i64 [[INDEX13]]
; AUTO_VEC-NEXT: [[WIDE_LOAD16:%.*]] = load <4 x float>, ptr [[TMP13]], align 4
; AUTO_VEC-NEXT: [[TMP14:%.*]] = fadd reassoc <4 x float> [[VEC_IND14]], [[WIDE_LOAD16]]
; AUTO_VEC-NEXT: store <4 x float> [[TMP14]], ptr [[TMP13]], align 4
; AUTO_VEC-NEXT: [[INDEX_NEXT17]] = add nuw i64 [[INDEX13]], 4
; AUTO_VEC-NEXT: [[VEC_IND_NEXT15]] = fadd reassoc <4 x float> [[VEC_IND14]], splat (float 1.680000e+02)
; AUTO_VEC-NEXT: [[TMP15:%.*]] = icmp eq i64 [[INDEX_NEXT17]], [[N_VEC6]]
; AUTO_VEC-NEXT: br i1 [[TMP15]], label [[VEC_EPILOG_MIDDLE_BLOCK:%.*]], label [[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP11:![0-9]+]]
; AUTO_VEC: vec.epilog.middle.block:
; AUTO_VEC-NEXT: [[CMP_N18:%.*]] = icmp eq i64 [[N_VEC6]], [[TMP0]]
; AUTO_VEC-NEXT: br i1 [[CMP_N18]], label [[FOR_COND_CLEANUP]], label [[FOR_BODY]]
; AUTO_VEC: for.cond.cleanup:
; AUTO_VEC-NEXT: ret void
; AUTO_VEC: for.body:
; AUTO_VEC-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ], [ 0, [[ITER_CHECK]] ], [ [[N_VEC]], [[VEC_EPILOG_ITER_CHECK]] ], [ [[N_VEC6]], [[VEC_EPILOG_MIDDLE_BLOCK]] ]
; AUTO_VEC-NEXT: [[X_012:%.*]] = phi float [ [[ADD3:%.*]], [[FOR_BODY]] ], [ 1.000000e+00, [[ITER_CHECK]] ], [ [[IND_END11]], [[VEC_EPILOG_ITER_CHECK]] ], [ [[IND_END9]], [[VEC_EPILOG_MIDDLE_BLOCK]] ]
; AUTO_VEC-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds nuw float, ptr [[P]], i64 [[INDVARS_IV]]
; AUTO_VEC-NEXT: [[TMP16:%.*]] = load float, ptr [[ARRAYIDX]], align 4
; AUTO_VEC-NEXT: [[ADD:%.*]] = fadd reassoc float [[X_012]], [[TMP16]]
; AUTO_VEC-NEXT: store float [[ADD]], ptr [[ARRAYIDX]], align 4
; AUTO_VEC-NEXT: [[ADD3]] = fadd reassoc float [[X_012]], 4.200000e+01
; AUTO_VEC-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; AUTO_VEC-NEXT: [[CMP_NOT:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], [[TMP0]]
; AUTO_VEC-NEXT: br i1 [[CMP_NOT]], label [[FOR_COND_CLEANUP]], label [[FOR_BODY]], !llvm.loop [[LOOP12:![0-9]+]]
;
entry:
%cmp.not11 = icmp eq i32 %N, 0
br i1 %cmp.not11, label %for.cond.cleanup, label %for.body.preheader
for.body.preheader:
%0 = zext i32 %N to i64
br label %for.body
for.cond.cleanup:
ret void
for.body:
%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
%x.012 = phi float [ 1.000000e+00, %for.body.preheader ], [ %add3, %for.body ]
%arrayidx = getelementptr inbounds float, ptr %p, i64 %indvars.iv
%1 = load float, ptr %arrayidx, align 4
%add = fadd reassoc float %x.012, %1
store float %add, ptr %arrayidx, align 4
%add3 = fadd reassoc float %x.012, 4.200000e+01
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%cmp.not = icmp eq i64 %indvars.iv.next, %0
br i1 %cmp.not, label %for.cond.cleanup, label %for.body
}
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