[llvm] r326154 - Fix PR36032, PR35432
Roman Lebedev via llvm-commits
llvm-commits at lists.llvm.org
Tue Feb 27 03:59:36 PST 2018
Pleas use better, more descriptive commit subjects.
It is absolutely not clear what "Fixes #bug" means when looking at the
mails in -commits list.
On Tue, Feb 27, 2018 at 3:17 AM, Evgeny Stupachenko via llvm-commits
<llvm-commits at lists.llvm.org> wrote:
> Author: evstupac
> Date: Mon Feb 26 16:17:31 2018
> New Revision: 326154
>
> URL: http://llvm.org/viewvc/llvm-project?rev=326154&view=rev
> Log:
> Fix PR36032, PR35432
>
> Summary:
>
> The change fix an assert fail at ScalarEvolutionExpander.cpp:
> assert(ExitCount != SE.getCouldNotCompute() && "Invalid loop count");
>
> Reviewers: sbaranga
>
> Differential Revision: http://reviews.llvm.org/D42604
>
> From: Evgeny Stupachenko <evstupac at gmail.com>
> <evgeny.v.stupachenko at intel.com>
>
> Added:
> llvm/trunk/test/Transforms/LoopVectorize/pr35432.ll
> llvm/trunk/test/Transforms/LoopVectorize/pr36032.ll
> Modified:
> llvm/trunk/lib/Analysis/ScalarEvolution.cpp
>
> Modified: llvm/trunk/lib/Analysis/ScalarEvolution.cpp
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/ScalarEvolution.cpp?rev=326154&r1=326153&r2=326154&view=diff
> ==============================================================================
> --- llvm/trunk/lib/Analysis/ScalarEvolution.cpp (original)
> +++ llvm/trunk/lib/Analysis/ScalarEvolution.cpp Mon Feb 26 16:17:31 2018
> @@ -11649,6 +11649,12 @@ private:
> if (!PredicatedRewrite)
> return Expr;
> for (auto *P : PredicatedRewrite->second){
> + // Wrap predicates from outer loops are not supported.
> + if (auto *WP = dyn_cast<const SCEVWrapPredicate>(P)) {
> + auto *AR = cast<const SCEVAddRecExpr>(WP->getExpr());
> + if (L != AR->getLoop())
> + return Expr;
> + }
> if (!addOverflowAssumption(P))
> return Expr;
> }
>
> Added: llvm/trunk/test/Transforms/LoopVectorize/pr35432.ll
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/LoopVectorize/pr35432.ll?rev=326154&view=auto
> ==============================================================================
> --- llvm/trunk/test/Transforms/LoopVectorize/pr35432.ll (added)
> +++ llvm/trunk/test/Transforms/LoopVectorize/pr35432.ll Mon Feb 26 16:17:31 2018
> @@ -0,0 +1,213 @@
> +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
> +; RUN: opt -loop-vectorize -S < %s | FileCheck %s
> +
> +; The test checks that there is no assert caused by issue described in PR35432
> +
> +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
> +target triple = "x86_64-unknown-linux-gnu"
> +
> + at a = common local_unnamed_addr global [192 x [192 x i32]] zeroinitializer, align 16
> +
> +; Function Attrs: nounwind uwtable
> +define i32 @main() local_unnamed_addr #0 {
> +; CHECK-LABEL: @main(
> +; CHECK-NEXT: entry:
> +; CHECK-NEXT: [[I:%.*]] = alloca i32, align 4
> +; CHECK-NEXT: [[S:%.*]] = alloca i16, align 2
> +; CHECK-NEXT: [[TMP0:%.*]] = bitcast i32* [[I]] to i8*
> +; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull [[TMP0]])
> +; CHECK-NEXT: store i32 0, i32* [[I]], align 4
> +; CHECK-NEXT: [[TMP1:%.*]] = bitcast i16* [[S]] to i8*
> +; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 2, i8* nonnull [[TMP1]])
> +; CHECK-NEXT: [[CALL:%.*]] = call i32 (i32*, ...) bitcast (i32 (...)* @goo to i32 (i32*, ...)*)(i32* nonnull [[I]])
> +; CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[I]], align 4
> +; CHECK-NEXT: [[STOREMERGE6:%.*]] = trunc i32 [[TMP2]] to i16
> +; CHECK-NEXT: store i16 [[STOREMERGE6]], i16* [[S]], align 2
> +; CHECK-NEXT: [[CONV17:%.*]] = and i32 [[TMP2]], 65472
> +; CHECK-NEXT: [[CMP8:%.*]] = icmp eq i32 [[CONV17]], 0
> +; CHECK-NEXT: br i1 [[CMP8]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_END12:%.*]]
> +; CHECK: for.body.lr.ph:
> +; CHECK-NEXT: [[TMP3:%.*]] = sub i32 -1, [[TMP2]]
> +; CHECK-NEXT: br label [[FOR_BODY:%.*]]
> +; CHECK: for.body:
> +; CHECK-NEXT: [[STOREMERGE_IN9:%.*]] = phi i32 [ [[TMP2]], [[FOR_BODY_LR_PH]] ], [ [[ADD:%.*]], [[FOR_INC9:%.*]] ]
> +; CHECK-NEXT: [[CONV52:%.*]] = and i32 [[STOREMERGE_IN9]], 255
> +; CHECK-NEXT: [[CMP63:%.*]] = icmp ult i32 [[TMP2]], [[CONV52]]
> +; CHECK-NEXT: br i1 [[CMP63]], label [[FOR_BODY8_LR_PH:%.*]], label [[FOR_INC9]]
> +; CHECK: for.body8.lr.ph:
> +; CHECK-NEXT: [[CONV3:%.*]] = trunc i32 [[STOREMERGE_IN9]] to i8
> +; CHECK-NEXT: [[DOTPROMOTED:%.*]] = load i32, i32* getelementptr inbounds ([192 x [192 x i32]], [192 x [192 x i32]]* @a, i64 0, i64 0, i64 0), align 16
> +; CHECK-NEXT: [[TMP4:%.*]] = add i8 [[CONV3]], -1
> +; CHECK-NEXT: [[TMP5:%.*]] = zext i8 [[TMP4]] to i32
> +; CHECK-NEXT: [[TMP6:%.*]] = sub i32 -1, [[TMP5]]
> +; CHECK-NEXT: [[TMP7:%.*]] = icmp ugt i32 [[TMP6]], [[TMP3]]
> +; CHECK-NEXT: [[UMAX:%.*]] = select i1 [[TMP7]], i32 [[TMP6]], i32 [[TMP3]]
> +; CHECK-NEXT: [[TMP8:%.*]] = add i32 [[UMAX]], 2
> +; CHECK-NEXT: [[TMP9:%.*]] = add i32 [[TMP8]], [[TMP5]]
> +; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[TMP9]], 8
> +; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_SCEVCHECK:%.*]]
> +; CHECK: vector.scevcheck:
> +; CHECK-NEXT: [[TMP10:%.*]] = add i8 [[CONV3]], -1
> +; CHECK-NEXT: [[TMP11:%.*]] = zext i8 [[TMP10]] to i32
> +; CHECK-NEXT: [[TMP12:%.*]] = sub i32 -1, [[TMP11]]
> +; CHECK-NEXT: [[TMP13:%.*]] = icmp ugt i32 [[TMP12]], [[TMP3]]
> +; CHECK-NEXT: [[UMAX1:%.*]] = select i1 [[TMP13]], i32 [[TMP12]], i32 [[TMP3]]
> +; CHECK-NEXT: [[TMP14:%.*]] = add i32 [[UMAX1]], 1
> +; CHECK-NEXT: [[TMP15:%.*]] = add i32 [[TMP14]], [[TMP11]]
> +; CHECK-NEXT: [[TMP16:%.*]] = trunc i32 [[TMP15]] to i8
> +; CHECK-NEXT: [[MUL:%.*]] = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 1, i8 [[TMP16]])
> +; CHECK-NEXT: [[MUL_RESULT:%.*]] = extractvalue { i8, i1 } [[MUL]], 0
> +; CHECK-NEXT: [[MUL_OVERFLOW:%.*]] = extractvalue { i8, i1 } [[MUL]], 1
> +; CHECK-NEXT: [[TMP17:%.*]] = add i8 [[TMP10]], [[MUL_RESULT]]
> +; CHECK-NEXT: [[TMP18:%.*]] = sub i8 [[TMP10]], [[MUL_RESULT]]
> +; CHECK-NEXT: [[TMP19:%.*]] = icmp ugt i8 [[TMP18]], [[TMP10]]
> +; CHECK-NEXT: [[TMP20:%.*]] = icmp ult i8 [[TMP17]], [[TMP10]]
> +; CHECK-NEXT: [[TMP21:%.*]] = select i1 true, i1 [[TMP19]], i1 [[TMP20]]
> +; CHECK-NEXT: [[TMP22:%.*]] = icmp ugt i32 [[TMP15]], 255
> +; CHECK-NEXT: [[TMP23:%.*]] = or i1 [[TMP21]], [[TMP22]]
> +; CHECK-NEXT: [[TMP24:%.*]] = or i1 [[TMP23]], [[MUL_OVERFLOW]]
> +; CHECK-NEXT: [[TMP25:%.*]] = or i1 false, [[TMP24]]
> +; CHECK-NEXT: br i1 [[TMP25]], label [[SCALAR_PH]], label [[VECTOR_PH:%.*]]
> +; CHECK: vector.ph:
> +; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP9]], 8
> +; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP9]], [[N_MOD_VF]]
> +; CHECK-NEXT: [[CAST_CRD:%.*]] = trunc i32 [[N_VEC]] to i8
> +; CHECK-NEXT: [[IND_END:%.*]] = sub i8 [[CONV3]], [[CAST_CRD]]
> +; CHECK-NEXT: [[TMP26:%.*]] = insertelement <4 x i32> zeroinitializer, i32 [[DOTPROMOTED]], i32 0
> +; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
> +; CHECK: vector.body:
> +; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
> +; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <4 x i32> [ [[TMP26]], [[VECTOR_PH]] ], [ [[TMP30:%.*]], [[VECTOR_BODY]] ]
> +; CHECK-NEXT: [[VEC_PHI2:%.*]] = phi <4 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP31:%.*]], [[VECTOR_BODY]] ]
> +; CHECK-NEXT: [[TMP27:%.*]] = trunc i32 [[INDEX]] to i8
> +; CHECK-NEXT: [[OFFSET_IDX:%.*]] = sub i8 [[CONV3]], [[TMP27]]
> +; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i8> undef, i8 [[OFFSET_IDX]], i32 0
> +; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i8> [[BROADCAST_SPLATINSERT]], <4 x i8> undef, <4 x i32> zeroinitializer
> +; CHECK-NEXT: [[INDUCTION:%.*]] = add <4 x i8> [[BROADCAST_SPLAT]], <i8 0, i8 -1, i8 -2, i8 -3>
> +; CHECK-NEXT: [[INDUCTION3:%.*]] = add <4 x i8> [[BROADCAST_SPLAT]], <i8 -4, i8 -5, i8 -6, i8 -7>
> +; CHECK-NEXT: [[TMP28:%.*]] = add i8 [[OFFSET_IDX]], 0
> +; CHECK-NEXT: [[TMP29:%.*]] = add i8 [[OFFSET_IDX]], -4
> +; CHECK-NEXT: [[TMP30]] = add <4 x i32> [[VEC_PHI]], <i32 1, i32 1, i32 1, i32 1>
> +; CHECK-NEXT: [[TMP31]] = add <4 x i32> [[VEC_PHI2]], <i32 1, i32 1, i32 1, i32 1>
> +; CHECK-NEXT: [[TMP32:%.*]] = add i8 [[TMP28]], -1
> +; CHECK-NEXT: [[TMP33:%.*]] = add i8 [[TMP29]], -1
> +; CHECK-NEXT: [[TMP34:%.*]] = zext i8 [[TMP32]] to i32
> +; CHECK-NEXT: [[TMP35:%.*]] = zext i8 [[TMP33]] to i32
> +; CHECK-NEXT: [[INDEX_NEXT]] = add i32 [[INDEX]], 8
> +; CHECK-NEXT: [[TMP36:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
> +; CHECK-NEXT: br i1 [[TMP36]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop !0
> +; CHECK: middle.block:
> +; CHECK-NEXT: [[BIN_RDX:%.*]] = add <4 x i32> [[TMP31]], [[TMP30]]
> +; CHECK-NEXT: [[RDX_SHUF:%.*]] = shufflevector <4 x i32> [[BIN_RDX]], <4 x i32> undef, <4 x i32> <i32 2, i32 3, i32 undef, i32 undef>
> +; CHECK-NEXT: [[BIN_RDX4:%.*]] = add <4 x i32> [[BIN_RDX]], [[RDX_SHUF]]
> +; CHECK-NEXT: [[RDX_SHUF5:%.*]] = shufflevector <4 x i32> [[BIN_RDX4]], <4 x i32> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef>
> +; CHECK-NEXT: [[BIN_RDX6:%.*]] = add <4 x i32> [[BIN_RDX4]], [[RDX_SHUF5]]
> +; CHECK-NEXT: [[TMP37:%.*]] = extractelement <4 x i32> [[BIN_RDX6]], i32 0
> +; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i32 [[TMP9]], [[N_VEC]]
> +; CHECK-NEXT: br i1 [[CMP_N]], label [[FOR_COND4_FOR_INC9_CRIT_EDGE:%.*]], label [[SCALAR_PH]]
> +; CHECK: scalar.ph:
> +; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i8 [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ [[CONV3]], [[FOR_BODY8_LR_PH]] ], [ [[CONV3]], [[VECTOR_SCEVCHECK]] ]
> +; CHECK-NEXT: [[BC_MERGE_RDX:%.*]] = phi i32 [ [[DOTPROMOTED]], [[FOR_BODY8_LR_PH]] ], [ [[DOTPROMOTED]], [[VECTOR_SCEVCHECK]] ], [ [[TMP37]], [[MIDDLE_BLOCK]] ]
> +; CHECK-NEXT: br label [[FOR_BODY8:%.*]]
> +; CHECK: for.body8:
> +; CHECK-NEXT: [[INC5:%.*]] = phi i32 [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY8]] ]
> +; CHECK-NEXT: [[C_04:%.*]] = phi i8 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[DEC:%.*]], [[FOR_BODY8]] ]
> +; CHECK-NEXT: [[INC]] = add i32 [[INC5]], 1
> +; CHECK-NEXT: [[DEC]] = add i8 [[C_04]], -1
> +; CHECK-NEXT: [[CONV5:%.*]] = zext i8 [[DEC]] to i32
> +; CHECK-NEXT: [[CMP6:%.*]] = icmp ult i32 [[TMP2]], [[CONV5]]
> +; CHECK-NEXT: br i1 [[CMP6]], label [[FOR_BODY8]], label [[FOR_COND4_FOR_INC9_CRIT_EDGE]], !llvm.loop !2
> +; CHECK: for.cond4.for.inc9_crit_edge:
> +; CHECK-NEXT: [[INC_LCSSA:%.*]] = phi i32 [ [[INC]], [[FOR_BODY8]] ], [ [[TMP37]], [[MIDDLE_BLOCK]] ]
> +; CHECK-NEXT: store i32 [[INC_LCSSA]], i32* getelementptr inbounds ([192 x [192 x i32]], [192 x [192 x i32]]* @a, i64 0, i64 0, i64 0), align 16
> +; CHECK-NEXT: br label [[FOR_INC9]]
> +; CHECK: for.inc9:
> +; CHECK-NEXT: [[CONV10:%.*]] = and i32 [[STOREMERGE_IN9]], 65535
> +; CHECK-NEXT: [[ADD]] = add nuw nsw i32 [[CONV10]], 1
> +; CHECK-NEXT: [[CONV1:%.*]] = and i32 [[ADD]], 65472
> +; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[CONV1]], 0
> +; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_COND_FOR_END12_CRIT_EDGE:%.*]]
> +; CHECK: for.cond.for.end12_crit_edge:
> +; CHECK-NEXT: [[ADD_LCSSA:%.*]] = phi i32 [ [[ADD]], [[FOR_INC9]] ]
> +; CHECK-NEXT: [[STOREMERGE:%.*]] = trunc i32 [[ADD_LCSSA]] to i16
> +; CHECK-NEXT: store i16 [[STOREMERGE]], i16* [[S]], align 2
> +; CHECK-NEXT: br label [[FOR_END12]]
> +; CHECK: for.end12:
> +; CHECK-NEXT: [[CALL13:%.*]] = call i32 (i16*, ...) bitcast (i32 (...)* @foo to i32 (i16*, ...)*)(i16* nonnull [[S]])
> +; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 2, i8* nonnull [[TMP1]])
> +; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull [[TMP0]])
> +; CHECK-NEXT: ret i32 0
> +;
> +entry:
> + %i = alloca i32, align 4
> + %s = alloca i16, align 2
> + %0 = bitcast i32* %i to i8*
> + call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0) #3
> + store i32 0, i32* %i, align 4
> + %1 = bitcast i16* %s to i8*
> + call void @llvm.lifetime.start.p0i8(i64 2, i8* nonnull %1) #3
> + %call = call i32 (i32*, ...) bitcast (i32 (...)* @goo to i32 (i32*, ...)*)(i32* nonnull %i) #3
> + %2 = load i32, i32* %i, align 4
> + %storemerge6 = trunc i32 %2 to i16
> + store i16 %storemerge6, i16* %s, align 2
> + %conv17 = and i32 %2, 65472
> + %cmp8 = icmp eq i32 %conv17, 0
> + br i1 %cmp8, label %for.body.lr.ph, label %for.end12
> +
> +for.body.lr.ph: ; preds = %entry
> + br label %for.body
> +
> +for.body: ; preds = %for.body.lr.ph, %for.inc9
> + %storemerge.in9 = phi i32 [ %2, %for.body.lr.ph ], [ %add, %for.inc9 ]
> + %conv52 = and i32 %storemerge.in9, 255
> + %cmp63 = icmp ult i32 %2, %conv52
> + br i1 %cmp63, label %for.body8.lr.ph, label %for.inc9
> +
> +for.body8.lr.ph: ; preds = %for.body
> + %conv3 = trunc i32 %storemerge.in9 to i8
> + %.promoted = load i32, i32* getelementptr inbounds ([192 x [192 x i32]], [192 x [192 x i32]]* @a, i64 0, i64 0, i64 0), align 16
> + br label %for.body8
> +
> +for.body8: ; preds = %for.body8.lr.ph, %for.body8
> + %inc5 = phi i32 [ %.promoted, %for.body8.lr.ph ], [ %inc, %for.body8 ]
> + %c.04 = phi i8 [ %conv3, %for.body8.lr.ph ], [ %dec, %for.body8 ]
> + %inc = add i32 %inc5, 1
> + %dec = add i8 %c.04, -1
> + %conv5 = zext i8 %dec to i32
> + %cmp6 = icmp ult i32 %2, %conv5
> + br i1 %cmp6, label %for.body8, label %for.cond4.for.inc9_crit_edge
> +
> +for.cond4.for.inc9_crit_edge: ; preds = %for.body8
> + %inc.lcssa = phi i32 [ %inc, %for.body8 ]
> + store i32 %inc.lcssa, i32* getelementptr inbounds ([192 x [192 x i32]], [192 x [192 x i32]]* @a, i64 0, i64 0, i64 0), align 16
> + br label %for.inc9
> +
> +for.inc9: ; preds = %for.cond4.for.inc9_crit_edge, %for.body
> + %conv10 = and i32 %storemerge.in9, 65535
> + %add = add nuw nsw i32 %conv10, 1
> + %conv1 = and i32 %add, 65472
> + %cmp = icmp eq i32 %conv1, 0
> + br i1 %cmp, label %for.body, label %for.cond.for.end12_crit_edge
> +
> +for.cond.for.end12_crit_edge: ; preds = %for.inc9
> + %add.lcssa = phi i32 [ %add, %for.inc9 ]
> + %storemerge = trunc i32 %add.lcssa to i16
> + store i16 %storemerge, i16* %s, align 2
> + br label %for.end12
> +
> +for.end12: ; preds = %for.cond.for.end12_crit_edge, %entry
> + %call13 = call i32 (i16*, ...) bitcast (i32 (...)* @foo to i32 (i16*, ...)*)(i16* nonnull %s) #3
> + call void @llvm.lifetime.end.p0i8(i64 2, i8* nonnull %1) #3
> + call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %0) #3
> + ret i32 0
> +}
> +
> +; Function Attrs: argmemonly nounwind
> +declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
> +
> +declare i32 @goo(...) local_unnamed_addr #2
> +
> +declare i32 @foo(...) local_unnamed_addr #2
> +
> +; Function Attrs: argmemonly nounwind
> +declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
>
> Added: llvm/trunk/test/Transforms/LoopVectorize/pr36032.ll
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/LoopVectorize/pr36032.ll?rev=326154&view=auto
> ==============================================================================
> --- llvm/trunk/test/Transforms/LoopVectorize/pr36032.ll (added)
> +++ llvm/trunk/test/Transforms/LoopVectorize/pr36032.ll Mon Feb 26 16:17:31 2018
> @@ -0,0 +1,154 @@
> +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
> +; RUN: opt -loop-vectorize -S < %s | FileCheck %s
> +
> +; The test checks that there is no assert caused by issue described in PR36032
> +
> +target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
> +target triple = "aarch64--"
> +
> +%struct.anon = type { i8 }
> +
> + at c = local_unnamed_addr global [6 x i8] zeroinitializer, align 1
> + at b = internal global %struct.anon zeroinitializer, align 1
> +
> +; Function Attrs: noreturn nounwind
> +define void @_Z1dv() local_unnamed_addr #0 {
> +; CHECK-LABEL: @_Z1dv(
> +; CHECK-NEXT: entry:
> +; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @"_ZN3$_01aEv"(%struct.anon* nonnull @b)
> +; CHECK-NEXT: [[SCEVGEP1:%.*]] = getelementptr i8, i8* [[CALL]], i64 4
> +; CHECK-NEXT: br label [[FOR_COND:%.*]]
> +; CHECK: for.cond:
> +; CHECK-NEXT: [[F_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD5:%.*]], [[FOR_COND_CLEANUP:%.*]] ]
> +; CHECK-NEXT: [[G_0:%.*]] = phi i32 [ undef, [[ENTRY]] ], [ [[G_1_LCSSA:%.*]], [[FOR_COND_CLEANUP]] ]
> +; CHECK-NEXT: [[CMP12:%.*]] = icmp ult i32 [[G_0]], 4
> +; CHECK-NEXT: [[CONV:%.*]] = and i32 [[F_0]], 65535
> +; CHECK-NEXT: br i1 [[CMP12]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_COND_CLEANUP]]
> +; CHECK: for.body.lr.ph:
> +; CHECK-NEXT: [[TMP0:%.*]] = zext i32 [[G_0]] to i64
> +; CHECK-NEXT: [[TMP1:%.*]] = sub i64 4, [[TMP0]]
> +; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP1]], 4
> +; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_SCEVCHECK:%.*]]
> +; CHECK: vector.scevcheck:
> +; CHECK-NEXT: [[TMP2:%.*]] = sub i64 3, [[TMP0]]
> +; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[G_0]], [[CONV]]
> +; CHECK-NEXT: [[TMP4:%.*]] = trunc i64 [[TMP2]] to i32
> +; CHECK-NEXT: [[MUL:%.*]] = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 1, i32 [[TMP4]])
> +; CHECK-NEXT: [[MUL_RESULT:%.*]] = extractvalue { i32, i1 } [[MUL]], 0
> +; CHECK-NEXT: [[MUL_OVERFLOW:%.*]] = extractvalue { i32, i1 } [[MUL]], 1
> +; CHECK-NEXT: [[TMP5:%.*]] = add i32 [[TMP3]], [[MUL_RESULT]]
> +; CHECK-NEXT: [[TMP6:%.*]] = sub i32 [[TMP3]], [[MUL_RESULT]]
> +; CHECK-NEXT: [[TMP7:%.*]] = icmp ugt i32 [[TMP6]], [[TMP3]]
> +; CHECK-NEXT: [[TMP8:%.*]] = icmp ult i32 [[TMP5]], [[TMP3]]
> +; CHECK-NEXT: [[TMP9:%.*]] = select i1 false, i1 [[TMP7]], i1 [[TMP8]]
> +; CHECK-NEXT: [[TMP10:%.*]] = icmp ugt i64 [[TMP2]], 4294967295
> +; CHECK-NEXT: [[TMP11:%.*]] = or i1 [[TMP9]], [[TMP10]]
> +; CHECK-NEXT: [[TMP12:%.*]] = or i1 [[TMP11]], [[MUL_OVERFLOW]]
> +; CHECK-NEXT: [[TMP13:%.*]] = or i1 false, [[TMP12]]
> +; CHECK-NEXT: br i1 [[TMP13]], label [[SCALAR_PH]], label [[VECTOR_MEMCHECK:%.*]]
> +; CHECK: vector.memcheck:
> +; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, i8* [[CALL]], i64 [[TMP0]]
> +; CHECK-NEXT: [[TMP14:%.*]] = add i32 [[G_0]], [[CONV]]
> +; CHECK-NEXT: [[TMP15:%.*]] = zext i32 [[TMP14]] to i64
> +; CHECK-NEXT: [[SCEVGEP2:%.*]] = getelementptr [6 x i8], [6 x i8]* @c, i64 0, i64 [[TMP15]]
> +; CHECK-NEXT: [[TMP16:%.*]] = sub i64 [[TMP15]], [[TMP0]]
> +; CHECK-NEXT: [[SCEVGEP3:%.*]] = getelementptr i8, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @c, i64 0, i64 4), i64 [[TMP16]]
> +; CHECK-NEXT: [[BOUND0:%.*]] = icmp ult i8* [[SCEVGEP]], [[SCEVGEP3]]
> +; CHECK-NEXT: [[BOUND1:%.*]] = icmp ult i8* [[SCEVGEP2]], [[SCEVGEP1]]
> +; CHECK-NEXT: [[FOUND_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]]
> +; CHECK-NEXT: [[MEMCHECK_CONFLICT:%.*]] = and i1 [[FOUND_CONFLICT]], true
> +; CHECK-NEXT: br i1 [[MEMCHECK_CONFLICT]], label [[SCALAR_PH]], label [[VECTOR_PH:%.*]]
> +; CHECK: vector.ph:
> +; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[TMP1]], 4
> +; CHECK-NEXT: [[N_VEC:%.*]] = sub i64 [[TMP1]], [[N_MOD_VF]]
> +; CHECK-NEXT: [[IND_END:%.*]] = add i64 [[TMP0]], [[N_VEC]]
> +; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
> +; CHECK: vector.body:
> +; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
> +; CHECK-NEXT: [[OFFSET_IDX:%.*]] = add i64 [[TMP0]], [[INDEX]]
> +; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i64> undef, i64 [[OFFSET_IDX]], i32 0
> +; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i64> [[BROADCAST_SPLATINSERT]], <4 x i64> undef, <4 x i32> zeroinitializer
> +; CHECK-NEXT: [[INDUCTION:%.*]] = add <4 x i64> [[BROADCAST_SPLAT]], <i64 0, i64 1, i64 2, i64 3>
> +; CHECK-NEXT: [[TMP17:%.*]] = add i64 [[OFFSET_IDX]], 0
> +; CHECK-NEXT: [[OFFSET_IDX4:%.*]] = add i64 [[TMP0]], [[INDEX]]
> +; CHECK-NEXT: [[TMP18:%.*]] = trunc i64 [[OFFSET_IDX4]] to i32
> +; CHECK-NEXT: [[BROADCAST_SPLATINSERT5:%.*]] = insertelement <4 x i32> undef, i32 [[TMP18]], i32 0
> +; CHECK-NEXT: [[BROADCAST_SPLAT6:%.*]] = shufflevector <4 x i32> [[BROADCAST_SPLATINSERT5]], <4 x i32> undef, <4 x i32> zeroinitializer
> +; CHECK-NEXT: [[INDUCTION7:%.*]] = add <4 x i32> [[BROADCAST_SPLAT6]], <i32 0, i32 1, i32 2, i32 3>
> +; CHECK-NEXT: [[TMP19:%.*]] = add i32 [[TMP18]], 0
> +; CHECK-NEXT: [[TMP20:%.*]] = add i32 [[CONV]], [[TMP19]]
> +; CHECK-NEXT: [[TMP21:%.*]] = zext i32 [[TMP20]] to i64
> +; CHECK-NEXT: [[TMP22:%.*]] = getelementptr inbounds [6 x i8], [6 x i8]* @c, i64 0, i64 [[TMP21]]
> +; CHECK-NEXT: [[TMP23:%.*]] = getelementptr i8, i8* [[TMP22]], i32 0
> +; CHECK-NEXT: [[TMP24:%.*]] = bitcast i8* [[TMP23]] to <4 x i8>*
> +; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <4 x i8>, <4 x i8>* [[TMP24]], align 1, !alias.scope !0
> +; CHECK-NEXT: [[TMP25:%.*]] = getelementptr inbounds i8, i8* [[CALL]], i64 [[TMP17]]
> +; CHECK-NEXT: [[TMP26:%.*]] = getelementptr i8, i8* [[TMP25]], i32 0
> +; CHECK-NEXT: [[TMP27:%.*]] = bitcast i8* [[TMP26]] to <4 x i8>*
> +; CHECK-NEXT: store <4 x i8> [[WIDE_LOAD]], <4 x i8>* [[TMP27]], align 1, !alias.scope !3, !noalias !0
> +; CHECK-NEXT: [[INDEX_NEXT]] = add i64 [[INDEX]], 4
> +; CHECK-NEXT: [[TMP28:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
> +; CHECK-NEXT: br i1 [[TMP28]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop !5
> +; CHECK: middle.block:
> +; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[TMP1]], [[N_VEC]]
> +; CHECK-NEXT: br i1 [[CMP_N]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]], label [[SCALAR_PH]]
> +; CHECK: scalar.ph:
> +; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ [[TMP0]], [[FOR_BODY_LR_PH]] ], [ [[TMP0]], [[VECTOR_SCEVCHECK]] ], [ [[TMP0]], [[VECTOR_MEMCHECK]] ]
> +; CHECK-NEXT: br label [[FOR_BODY:%.*]]
> +; CHECK: for.cond.cleanup.loopexit:
> +; CHECK-NEXT: br label [[FOR_COND_CLEANUP]]
> +; CHECK: for.cond.cleanup:
> +; CHECK-NEXT: [[G_1_LCSSA]] = phi i32 [ [[G_0]], [[FOR_COND]] ], [ 4, [[FOR_COND_CLEANUP_LOOPEXIT]] ]
> +; CHECK-NEXT: [[ADD5]] = add nuw nsw i32 [[CONV]], 4
> +; CHECK-NEXT: br label [[FOR_COND]]
> +; CHECK: for.body:
> +; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
> +; CHECK-NEXT: [[TMP29:%.*]] = trunc i64 [[INDVARS_IV]] to i32
> +; CHECK-NEXT: [[ADD:%.*]] = add i32 [[CONV]], [[TMP29]]
> +; CHECK-NEXT: [[IDXPROM:%.*]] = zext i32 [[ADD]] to i64
> +; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [6 x i8], [6 x i8]* @c, i64 0, i64 [[IDXPROM]]
> +; CHECK-NEXT: [[TMP30:%.*]] = load i8, i8* [[ARRAYIDX]], align 1
> +; CHECK-NEXT: [[ARRAYIDX3:%.*]] = getelementptr inbounds i8, i8* [[CALL]], i64 [[INDVARS_IV]]
> +; CHECK-NEXT: store i8 [[TMP30]], i8* [[ARRAYIDX3]], align 1
> +; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
> +; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], 4
> +; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_COND_CLEANUP_LOOPEXIT]], label [[FOR_BODY]], !llvm.loop !7
> +;
> +entry:
> + %call = tail call i8* @"_ZN3$_01aEv"(%struct.anon* nonnull @b) #2
> + br label %for.cond
> +
> +for.cond: ; preds = %for.cond.cleanup, %entry
> + %f.0 = phi i32 [ 0, %entry ], [ %add5, %for.cond.cleanup ]
> + %g.0 = phi i32 [ undef, %entry ], [ %g.1.lcssa, %for.cond.cleanup ]
> + %cmp12 = icmp ult i32 %g.0, 4
> + %conv = and i32 %f.0, 65535
> + br i1 %cmp12, label %for.body.lr.ph, label %for.cond.cleanup
> +
> +for.body.lr.ph: ; preds = %for.cond
> + %0 = zext i32 %g.0 to i64
> + br label %for.body
> +
> +for.cond.cleanup.loopexit: ; preds = %for.body
> + br label %for.cond.cleanup
> +
> +for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %for.cond
> + %g.1.lcssa = phi i32 [ %g.0, %for.cond ], [ 4, %for.cond.cleanup.loopexit ]
> + %add5 = add nuw nsw i32 %conv, 4
> + br label %for.cond
> +
> +for.body: ; preds = %for.body, %for.body.lr.ph
> + %indvars.iv = phi i64 [ %0, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ]
> + %1 = trunc i64 %indvars.iv to i32
> + %add = add i32 %conv, %1
> + %idxprom = zext i32 %add to i64
> + %arrayidx = getelementptr inbounds [6 x i8], [6 x i8]* @c, i64 0, i64 %idxprom
> + %2 = load i8, i8* %arrayidx, align 1
> + %arrayidx3 = getelementptr inbounds i8, i8* %call, i64 %indvars.iv
> + store i8 %2, i8* %arrayidx3, align 1
> + %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
> + %exitcond = icmp eq i64 %indvars.iv.next, 4
> + br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body
> +}
> +
> +declare i8* @"_ZN3$_01aEv"(%struct.anon*) local_unnamed_addr #1
>
>
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