[llvm] [LV] Check isPredInst instead of isScalarWithPred in uniform analysis. (PR #98892)
Florian Hahn via llvm-commits
llvm-commits at lists.llvm.org
Fri Jul 19 01:25:16 PDT 2024
https://github.com/fhahn updated https://github.com/llvm/llvm-project/pull/98892
>From b6ab904f399e9b12a5a1423817f876d96362fd06 Mon Sep 17 00:00:00 2001
From: Florian Hahn <flo at fhahn.com>
Date: Mon, 15 Jul 2024 12:48:55 +0100
Subject: [PATCH 1/2] [LV] Check isPredInst instead of isScalarWithPred in
uniform analysis.
Any instruction marked as uniform will result in a uniform
VPReplicateRecipe. If it requires predication, it will be placed in a
replicate region, even if isScalarWithPredication returns false.
Check isPredicatedInst instead of isScalarWithPredication to avoid
generating uniform VPReplicateRecipes placed inside a replicate region.
This fixes an assertion when using scalable VFs.
Fixes https://github.com/llvm/llvm-project/issues/80416.
Fixes https://github.com/llvm/llvm-project/issues/94328.
---
.../Transforms/Vectorize/LoopVectorize.cpp | 11 +-
.../AArch64/divs-with-scalable-vfs.ll | 391 ++++++++++++++++++
.../X86/consecutive-ptr-uniforms.ll | 2 +-
3 files changed, 399 insertions(+), 5 deletions(-)
create mode 100644 llvm/test/Transforms/LoopVectorize/AArch64/divs-with-scalable-vfs.ll
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index 5520baef7152d..3d7df2efd6b85 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -3907,7 +3907,7 @@ void LoopVectorizationCostModel::collectLoopUniforms(ElementCount VF) {
SetVector<Instruction *> Worklist;
// Add uniform instructions demanding lane 0 to the worklist. Instructions
- // that are scalar with predication must not be considered uniform after
+ // that are require predication must not be considered uniform after
// vectorization, because that would create an erroneous replicating region
// where only a single instance out of VF should be formed.
// TODO: optimize such seldom cases if found important, see PR40816.
@@ -3917,9 +3917,10 @@ void LoopVectorizationCostModel::collectLoopUniforms(ElementCount VF) {
<< *I << "\n");
return;
}
- if (isScalarWithPredication(I, VF)) {
- LLVM_DEBUG(dbgs() << "LV: Found not uniform being ScalarWithPredication: "
- << *I << "\n");
+ if (isPredicatedInst(I)) {
+ LLVM_DEBUG(
+ dbgs() << "LV: Found not uniform due to requiring predication: " << *I
+ << "\n");
return;
}
LLVM_DEBUG(dbgs() << "LV: Found uniform instruction: " << *I << "\n");
@@ -9482,6 +9483,8 @@ void VPInterleaveRecipe::execute(VPTransformState &State) {
void VPReplicateRecipe::execute(VPTransformState &State) {
Instruction *UI = getUnderlyingInstr();
if (State.Instance) { // Generate a single instance.
+ assert((State.VF.isScalar() || !isUniform()) &&
+ "uniform recipe shouldn't be predicated");
assert(!State.VF.isScalable() && "Can't scalarize a scalable vector");
State.ILV->scalarizeInstruction(UI, this, *State.Instance, State);
// Insert scalar instance packing it into a vector.
diff --git a/llvm/test/Transforms/LoopVectorize/AArch64/divs-with-scalable-vfs.ll b/llvm/test/Transforms/LoopVectorize/AArch64/divs-with-scalable-vfs.ll
new file mode 100644
index 0000000000000..6182e005c4938
--- /dev/null
+++ b/llvm/test/Transforms/LoopVectorize/AArch64/divs-with-scalable-vfs.ll
@@ -0,0 +1,391 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt -p loop-vectorize -mtriple aarch64 -mcpu=neoverse-v1 -S %s | FileCheck %s
+
+; Test case for https://github.com/llvm/llvm-project/issues/94328.
+define void @sdiv_feeding_gep(ptr %dst, i32 %x, i64 %M, i64 %conv6, i64 %N) {
+; CHECK-LABEL: define void @sdiv_feeding_gep(
+; CHECK-SAME: ptr [[DST:%.*]], i32 [[X:%.*]], i64 [[M:%.*]], i64 [[CONV6:%.*]], i64 [[N:%.*]]) #[[ATTR0:[0-9]+]] {
+; CHECK-NEXT: [[ENTRY:.*]]:
+; CHECK-NEXT: [[CONV61:%.*]] = zext i32 [[X]] to i64
+; CHECK-NEXT: [[TMP0:%.*]] = call i64 @llvm.vscale.i64()
+; CHECK-NEXT: [[TMP1:%.*]] = mul i64 [[TMP0]], 4
+; CHECK-NEXT: [[TMP2:%.*]] = call i64 @llvm.umax.i64(i64 8, i64 [[TMP1]])
+; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], [[TMP2]]
+; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_SCEVCHECK:.*]]
+; CHECK: [[VECTOR_SCEVCHECK]]:
+; CHECK-NEXT: [[TMP3:%.*]] = add i64 [[N]], -1
+; CHECK-NEXT: [[TMP4:%.*]] = trunc i64 [[TMP3]] to i32
+; CHECK-NEXT: [[TMP5:%.*]] = icmp slt i32 [[TMP4]], 0
+; CHECK-NEXT: [[TMP6:%.*]] = icmp ugt i64 [[TMP3]], 4294967295
+; CHECK-NEXT: [[TMP7:%.*]] = or i1 [[TMP5]], [[TMP6]]
+; CHECK-NEXT: br i1 [[TMP7]], label %[[SCALAR_PH]], label %[[VECTOR_PH:.*]]
+; CHECK: [[VECTOR_PH]]:
+; CHECK-NEXT: [[TMP8:%.*]] = call i64 @llvm.vscale.i64()
+; CHECK-NEXT: [[TMP9:%.*]] = mul i64 [[TMP8]], 4
+; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[N]], [[TMP9]]
+; CHECK-NEXT: [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]]
+; CHECK-NEXT: [[TMP10:%.*]] = call i64 @llvm.vscale.i64()
+; CHECK-NEXT: [[TMP11:%.*]] = mul i64 [[TMP10]], 4
+; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
+; CHECK: [[VECTOR_BODY]]:
+; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
+; CHECK-NEXT: [[TMP12:%.*]] = add i64 [[INDEX]], 0
+; CHECK-NEXT: [[TMP13:%.*]] = call i64 @llvm.vscale.i64()
+; CHECK-NEXT: [[TMP14:%.*]] = mul i64 [[TMP13]], 2
+; CHECK-NEXT: [[TMP15:%.*]] = add i64 [[TMP14]], 0
+; CHECK-NEXT: [[TMP16:%.*]] = mul i64 [[TMP15]], 1
+; CHECK-NEXT: [[TMP17:%.*]] = add i64 [[INDEX]], [[TMP16]]
+; CHECK-NEXT: [[TMP18:%.*]] = sdiv i64 [[M]], [[CONV6]]
+; CHECK-NEXT: [[TMP19:%.*]] = sdiv i64 [[M]], [[CONV6]]
+; CHECK-NEXT: [[TMP20:%.*]] = trunc i64 [[TMP18]] to i32
+; CHECK-NEXT: [[TMP21:%.*]] = trunc i64 [[TMP19]] to i32
+; CHECK-NEXT: [[TMP22:%.*]] = mul i64 [[TMP18]], [[CONV61]]
+; CHECK-NEXT: [[TMP23:%.*]] = mul i64 [[TMP19]], [[CONV61]]
+; CHECK-NEXT: [[TMP24:%.*]] = sub i64 [[TMP12]], [[TMP22]]
+; CHECK-NEXT: [[TMP25:%.*]] = sub i64 [[TMP17]], [[TMP23]]
+; CHECK-NEXT: [[TMP26:%.*]] = trunc i64 [[TMP24]] to i32
+; CHECK-NEXT: [[TMP27:%.*]] = trunc i64 [[TMP25]] to i32
+; CHECK-NEXT: [[TMP28:%.*]] = mul i32 [[X]], [[TMP20]]
+; CHECK-NEXT: [[TMP29:%.*]] = mul i32 [[X]], [[TMP21]]
+; CHECK-NEXT: [[TMP30:%.*]] = add i32 [[TMP28]], [[TMP26]]
+; CHECK-NEXT: [[TMP31:%.*]] = add i32 [[TMP29]], [[TMP27]]
+; CHECK-NEXT: [[TMP32:%.*]] = sext i32 [[TMP30]] to i64
+; CHECK-NEXT: [[TMP33:%.*]] = sext i32 [[TMP31]] to i64
+; CHECK-NEXT: [[TMP34:%.*]] = getelementptr double, ptr [[DST]], i64 [[TMP32]]
+; CHECK-NEXT: [[TMP35:%.*]] = getelementptr double, ptr [[DST]], i64 [[TMP33]]
+; CHECK-NEXT: [[TMP36:%.*]] = getelementptr double, ptr [[TMP34]], i32 0
+; CHECK-NEXT: [[TMP37:%.*]] = call i64 @llvm.vscale.i64()
+; CHECK-NEXT: [[TMP38:%.*]] = mul i64 [[TMP37]], 2
+; CHECK-NEXT: [[TMP39:%.*]] = getelementptr double, ptr [[TMP34]], i64 [[TMP38]]
+; CHECK-NEXT: store <vscale x 2 x double> zeroinitializer, ptr [[TMP36]], align 8
+; CHECK-NEXT: store <vscale x 2 x double> zeroinitializer, ptr [[TMP39]], align 8
+; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], [[TMP11]]
+; CHECK-NEXT: [[TMP40:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
+; CHECK-NEXT: br i1 [[TMP40]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
+; CHECK: [[MIDDLE_BLOCK]]:
+; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
+; CHECK-NEXT: br i1 [[CMP_N]], label %[[EXIT:.*]], label %[[SCALAR_PH]]
+; CHECK: [[SCALAR_PH]]:
+; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ], [ 0, %[[VECTOR_SCEVCHECK]] ]
+; CHECK-NEXT: br label %[[LOOP:.*]]
+; CHECK: [[LOOP]]:
+; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
+; CHECK-NEXT: [[DIV18:%.*]] = sdiv i64 [[M]], [[CONV6]]
+; CHECK-NEXT: [[CONV20:%.*]] = trunc i64 [[DIV18]] to i32
+; CHECK-NEXT: [[MUL30:%.*]] = mul i64 [[DIV18]], [[CONV61]]
+; CHECK-NEXT: [[SUB31:%.*]] = sub i64 [[IV]], [[MUL30]]
+; CHECK-NEXT: [[CONV34:%.*]] = trunc i64 [[SUB31]] to i32
+; CHECK-NEXT: [[MUL35:%.*]] = mul i32 [[X]], [[CONV20]]
+; CHECK-NEXT: [[ADD36:%.*]] = add i32 [[MUL35]], [[CONV34]]
+; CHECK-NEXT: [[IDXPROM:%.*]] = sext i32 [[ADD36]] to i64
+; CHECK-NEXT: [[GEP:%.*]] = getelementptr double, ptr [[DST]], i64 [[IDXPROM]]
+; CHECK-NEXT: store double 0.000000e+00, ptr [[GEP]], align 8
+; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1
+; CHECK-NEXT: [[EC:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
+; CHECK-NEXT: br i1 [[EC]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP3:![0-9]+]]
+; CHECK: [[EXIT]]:
+; CHECK-NEXT: ret void
+;
+entry:
+ %conv61 = zext i32 %x to i64
+ br label %loop
+
+loop:
+ %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
+ %div18 = sdiv i64 %M, %conv6
+ %conv20 = trunc i64 %div18 to i32
+ %mul30 = mul i64 %div18, %conv61
+ %sub31 = sub i64 %iv, %mul30
+ %conv34 = trunc i64 %sub31 to i32
+ %mul35 = mul i32 %x, %conv20
+ %add36 = add i32 %mul35, %conv34
+ %idxprom = sext i32 %add36 to i64
+ %gep = getelementptr double, ptr %dst, i64 %idxprom
+ store double 0.000000e+00, ptr %gep, align 8
+ %iv.next = add i64 %iv, 1
+ %ec = icmp eq i64 %iv.next, %N
+ br i1 %ec, label %exit, label %loop
+
+exit:
+ ret void
+}
+
+define void @sdiv_feeding_gep_predicated(ptr %dst, i32 %x, i64 %M, i64 %conv6, i64 %N) {
+; CHECK-LABEL: define void @sdiv_feeding_gep_predicated(
+; CHECK-SAME: ptr [[DST:%.*]], i32 [[X:%.*]], i64 [[M:%.*]], i64 [[CONV6:%.*]], i64 [[N:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT: [[ENTRY:.*]]:
+; CHECK-NEXT: [[CONV61:%.*]] = zext i32 [[X]] to i64
+; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_SCEVCHECK:.*]]
+; CHECK: [[VECTOR_SCEVCHECK]]:
+; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[N]], -1
+; CHECK-NEXT: [[TMP1:%.*]] = trunc i64 [[TMP0]] to i32
+; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i32 [[TMP1]], 0
+; CHECK-NEXT: [[TMP3:%.*]] = icmp ugt i64 [[TMP0]], 4294967295
+; CHECK-NEXT: [[TMP4:%.*]] = or i1 [[TMP2]], [[TMP3]]
+; CHECK-NEXT: br i1 [[TMP4]], label %[[SCALAR_PH]], label %[[VECTOR_PH:.*]]
+; CHECK: [[VECTOR_PH]]:
+; CHECK-NEXT: [[TMP5:%.*]] = call i64 @llvm.vscale.i64()
+; CHECK-NEXT: [[TMP6:%.*]] = mul i64 [[TMP5]], 2
+; CHECK-NEXT: [[TMP7:%.*]] = sub i64 [[TMP6]], 1
+; CHECK-NEXT: [[N_RND_UP:%.*]] = add i64 [[N]], [[TMP7]]
+; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[N_RND_UP]], [[TMP6]]
+; CHECK-NEXT: [[N_VEC:%.*]] = sub i64 [[N_RND_UP]], [[N_MOD_VF]]
+; CHECK-NEXT: [[TMP8:%.*]] = call i64 @llvm.vscale.i64()
+; CHECK-NEXT: [[TMP9:%.*]] = mul i64 [[TMP8]], 2
+; CHECK-NEXT: [[TMP10:%.*]] = call i64 @llvm.vscale.i64()
+; CHECK-NEXT: [[TMP11:%.*]] = mul i64 [[TMP10]], 2
+; CHECK-NEXT: [[TMP12:%.*]] = sub i64 [[N]], [[TMP11]]
+; CHECK-NEXT: [[TMP13:%.*]] = icmp ugt i64 [[N]], [[TMP11]]
+; CHECK-NEXT: [[TMP14:%.*]] = select i1 [[TMP13]], i64 [[TMP12]], i64 0
+; CHECK-NEXT: [[ACTIVE_LANE_MASK_ENTRY:%.*]] = call <vscale x 2 x i1> @llvm.get.active.lane.mask.nxv2i1.i64(i64 0, i64 [[N]])
+; CHECK-NEXT: [[TMP15:%.*]] = call <vscale x 2 x i64> @llvm.experimental.stepvector.nxv2i64()
+; CHECK-NEXT: [[TMP16:%.*]] = add <vscale x 2 x i64> [[TMP15]], zeroinitializer
+; CHECK-NEXT: [[TMP17:%.*]] = mul <vscale x 2 x i64> [[TMP16]], shufflevector (<vscale x 2 x i64> insertelement (<vscale x 2 x i64> poison, i64 1, i64 0), <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer)
+; CHECK-NEXT: [[INDUCTION:%.*]] = add <vscale x 2 x i64> zeroinitializer, [[TMP17]]
+; CHECK-NEXT: [[TMP18:%.*]] = call i64 @llvm.vscale.i64()
+; CHECK-NEXT: [[TMP19:%.*]] = mul i64 [[TMP18]], 2
+; CHECK-NEXT: [[TMP20:%.*]] = mul i64 1, [[TMP19]]
+; CHECK-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <vscale x 2 x i64> poison, i64 [[TMP20]], i64 0
+; CHECK-NEXT: [[DOTSPLAT:%.*]] = shufflevector <vscale x 2 x i64> [[DOTSPLATINSERT]], <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer
+; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <vscale x 2 x i64> poison, i64 [[M]], i64 0
+; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <vscale x 2 x i64> [[BROADCAST_SPLATINSERT]], <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer
+; CHECK-NEXT: [[BROADCAST_SPLATINSERT1:%.*]] = insertelement <vscale x 2 x i64> poison, i64 [[CONV6]], i64 0
+; CHECK-NEXT: [[BROADCAST_SPLAT2:%.*]] = shufflevector <vscale x 2 x i64> [[BROADCAST_SPLATINSERT1]], <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer
+; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
+; CHECK: [[VECTOR_BODY]]:
+; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
+; CHECK-NEXT: [[ACTIVE_LANE_MASK:%.*]] = phi <vscale x 2 x i1> [ [[ACTIVE_LANE_MASK_ENTRY]], %[[VECTOR_PH]] ], [ [[ACTIVE_LANE_MASK_NEXT:%.*]], %[[VECTOR_BODY]] ]
+; CHECK-NEXT: [[VEC_IND:%.*]] = phi <vscale x 2 x i64> [ [[INDUCTION]], %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]
+; CHECK-NEXT: [[TMP21:%.*]] = add i64 [[INDEX]], 0
+; CHECK-NEXT: [[TMP22:%.*]] = icmp ule <vscale x 2 x i64> [[VEC_IND]], [[BROADCAST_SPLAT]]
+; CHECK-NEXT: [[TMP23:%.*]] = select <vscale x 2 x i1> [[ACTIVE_LANE_MASK]], <vscale x 2 x i1> [[TMP22]], <vscale x 2 x i1> zeroinitializer
+; CHECK-NEXT: [[TMP24:%.*]] = select <vscale x 2 x i1> [[TMP23]], <vscale x 2 x i64> [[BROADCAST_SPLAT2]], <vscale x 2 x i64> shufflevector (<vscale x 2 x i64> insertelement (<vscale x 2 x i64> poison, i64 1, i64 0), <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer)
+; CHECK-NEXT: [[TMP25:%.*]] = sdiv <vscale x 2 x i64> [[BROADCAST_SPLAT]], [[TMP24]]
+; CHECK-NEXT: [[TMP26:%.*]] = extractelement <vscale x 2 x i64> [[TMP25]], i32 0
+; CHECK-NEXT: [[TMP27:%.*]] = trunc i64 [[TMP26]] to i32
+; CHECK-NEXT: [[TMP28:%.*]] = mul i64 [[TMP26]], [[CONV61]]
+; CHECK-NEXT: [[TMP29:%.*]] = sub i64 [[TMP21]], [[TMP28]]
+; CHECK-NEXT: [[TMP30:%.*]] = trunc i64 [[TMP29]] to i32
+; CHECK-NEXT: [[TMP31:%.*]] = mul i32 [[X]], [[TMP27]]
+; CHECK-NEXT: [[TMP32:%.*]] = add i32 [[TMP31]], [[TMP30]]
+; CHECK-NEXT: [[TMP33:%.*]] = sext i32 [[TMP32]] to i64
+; CHECK-NEXT: [[TMP34:%.*]] = getelementptr double, ptr [[DST]], i64 [[TMP33]]
+; CHECK-NEXT: [[TMP35:%.*]] = getelementptr double, ptr [[TMP34]], i32 0
+; CHECK-NEXT: call void @llvm.masked.store.nxv2f64.p0(<vscale x 2 x double> zeroinitializer, ptr [[TMP35]], i32 8, <vscale x 2 x i1> [[TMP23]])
+; CHECK-NEXT: [[INDEX_NEXT]] = add i64 [[INDEX]], [[TMP9]]
+; CHECK-NEXT: [[ACTIVE_LANE_MASK_NEXT]] = call <vscale x 2 x i1> @llvm.get.active.lane.mask.nxv2i1.i64(i64 [[INDEX]], i64 [[TMP14]])
+; CHECK-NEXT: [[TMP36:%.*]] = xor <vscale x 2 x i1> [[ACTIVE_LANE_MASK_NEXT]], shufflevector (<vscale x 2 x i1> insertelement (<vscale x 2 x i1> poison, i1 true, i64 0), <vscale x 2 x i1> poison, <vscale x 2 x i32> zeroinitializer)
+; CHECK-NEXT: [[VEC_IND_NEXT]] = add <vscale x 2 x i64> [[VEC_IND]], [[DOTSPLAT]]
+; CHECK-NEXT: [[TMP37:%.*]] = extractelement <vscale x 2 x i1> [[TMP36]], i32 0
+; CHECK-NEXT: br i1 [[TMP37]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
+; CHECK: [[MIDDLE_BLOCK]]:
+; CHECK-NEXT: br i1 true, label %[[EXIT:.*]], label %[[SCALAR_PH]]
+; CHECK: [[SCALAR_PH]]:
+; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ], [ 0, %[[VECTOR_SCEVCHECK]] ]
+; CHECK-NEXT: br label %[[LOOP:.*]]
+; CHECK: [[LOOP]]:
+; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ]
+; CHECK-NEXT: [[C:%.*]] = icmp ule i64 [[IV]], [[M]]
+; CHECK-NEXT: br i1 [[C]], label %[[THEN:.*]], label %[[LOOP_LATCH]]
+; CHECK: [[THEN]]:
+; CHECK-NEXT: [[DIV18:%.*]] = sdiv i64 [[M]], [[CONV6]]
+; CHECK-NEXT: [[CONV20:%.*]] = trunc i64 [[DIV18]] to i32
+; CHECK-NEXT: [[MUL30:%.*]] = mul i64 [[DIV18]], [[CONV61]]
+; CHECK-NEXT: [[SUB31:%.*]] = sub i64 [[IV]], [[MUL30]]
+; CHECK-NEXT: [[CONV34:%.*]] = trunc i64 [[SUB31]] to i32
+; CHECK-NEXT: [[MUL35:%.*]] = mul i32 [[X]], [[CONV20]]
+; CHECK-NEXT: [[ADD36:%.*]] = add i32 [[MUL35]], [[CONV34]]
+; CHECK-NEXT: [[IDXPROM:%.*]] = sext i32 [[ADD36]] to i64
+; CHECK-NEXT: [[GEP:%.*]] = getelementptr double, ptr [[DST]], i64 [[IDXPROM]]
+; CHECK-NEXT: store double 0.000000e+00, ptr [[GEP]], align 8
+; CHECK-NEXT: br label %[[LOOP_LATCH]]
+; CHECK: [[LOOP_LATCH]]:
+; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1
+; CHECK-NEXT: [[EC:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
+; CHECK-NEXT: br i1 [[EC]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP5:![0-9]+]]
+; CHECK: [[EXIT]]:
+; CHECK-NEXT: ret void
+;
+entry:
+ %conv61 = zext i32 %x to i64
+ br label %loop
+
+loop:
+ %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
+ %c = icmp ule i64 %iv, %M
+ br i1 %c, label %then, label %loop.latch
+
+then:
+ %div18 = sdiv i64 %M, %conv6
+ %conv20 = trunc i64 %div18 to i32
+ %mul30 = mul i64 %div18, %conv61
+ %sub31 = sub i64 %iv, %mul30
+ %conv34 = trunc i64 %sub31 to i32
+ %mul35 = mul i32 %x, %conv20
+ %add36 = add i32 %mul35, %conv34
+ %idxprom = sext i32 %add36 to i64
+ %gep = getelementptr double, ptr %dst, i64 %idxprom
+ store double 0.000000e+00, ptr %gep, align 8
+ br label %loop.latch
+
+loop.latch:
+ %iv.next = add i64 %iv, 1
+ %ec = icmp eq i64 %iv.next, %N
+ br i1 %ec, label %exit, label %loop
+
+exit:
+ ret void
+}
+
+; Test case for https://github.com/llvm/llvm-project/issues/80416.
+define void @udiv_urem_feeding_gep(i64 %x, ptr %dst, i64 %N) {
+; CHECK-LABEL: define void @udiv_urem_feeding_gep(
+; CHECK-SAME: i64 [[X:%.*]], ptr [[DST:%.*]], i64 [[N:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT: [[ENTRY:.*]]:
+; CHECK-NEXT: [[MUL_1_I:%.*]] = mul i64 [[X]], [[X]]
+; CHECK-NEXT: [[MUL_2_I:%.*]] = mul i64 [[MUL_1_I]], [[X]]
+; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[N]], 1
+; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_SCEVCHECK:.*]]
+; CHECK: [[VECTOR_SCEVCHECK]]:
+; CHECK-NEXT: [[TMP1:%.*]] = trunc i64 [[N]] to i32
+; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i32 [[TMP1]], 0
+; CHECK-NEXT: [[TMP3:%.*]] = icmp ugt i64 [[N]], 4294967295
+; CHECK-NEXT: [[TMP4:%.*]] = or i1 [[TMP2]], [[TMP3]]
+; CHECK-NEXT: br i1 [[TMP4]], label %[[SCALAR_PH]], label %[[VECTOR_PH:.*]]
+; CHECK: [[VECTOR_PH]]:
+; CHECK-NEXT: [[TMP5:%.*]] = call i64 @llvm.vscale.i64()
+; CHECK-NEXT: [[TMP6:%.*]] = mul i64 [[TMP5]], 2
+; CHECK-NEXT: [[TMP7:%.*]] = sub i64 [[TMP6]], 1
+; CHECK-NEXT: [[N_RND_UP:%.*]] = add i64 [[TMP0]], [[TMP7]]
+; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[N_RND_UP]], [[TMP6]]
+; CHECK-NEXT: [[N_VEC:%.*]] = sub i64 [[N_RND_UP]], [[N_MOD_VF]]
+; CHECK-NEXT: [[TMP8:%.*]] = call i64 @llvm.vscale.i64()
+; CHECK-NEXT: [[TMP9:%.*]] = mul i64 [[TMP8]], 2
+; CHECK-NEXT: [[TMP10:%.*]] = call i64 @llvm.vscale.i64()
+; CHECK-NEXT: [[TMP11:%.*]] = mul i64 [[TMP10]], 2
+; CHECK-NEXT: [[TMP12:%.*]] = sub i64 [[TMP0]], [[TMP11]]
+; CHECK-NEXT: [[TMP13:%.*]] = icmp ugt i64 [[TMP0]], [[TMP11]]
+; CHECK-NEXT: [[TMP14:%.*]] = select i1 [[TMP13]], i64 [[TMP12]], i64 0
+; CHECK-NEXT: [[ACTIVE_LANE_MASK_ENTRY:%.*]] = call <vscale x 2 x i1> @llvm.get.active.lane.mask.nxv2i1.i64(i64 0, i64 [[TMP0]])
+; CHECK-NEXT: [[TMP15:%.*]] = call <vscale x 2 x i64> @llvm.experimental.stepvector.nxv2i64()
+; CHECK-NEXT: [[TMP16:%.*]] = add <vscale x 2 x i64> [[TMP15]], zeroinitializer
+; CHECK-NEXT: [[TMP17:%.*]] = mul <vscale x 2 x i64> [[TMP16]], shufflevector (<vscale x 2 x i64> insertelement (<vscale x 2 x i64> poison, i64 1, i64 0), <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer)
+; CHECK-NEXT: [[INDUCTION:%.*]] = add <vscale x 2 x i64> zeroinitializer, [[TMP17]]
+; CHECK-NEXT: [[TMP18:%.*]] = call i64 @llvm.vscale.i64()
+; CHECK-NEXT: [[TMP19:%.*]] = mul i64 [[TMP18]], 2
+; CHECK-NEXT: [[TMP20:%.*]] = mul i64 1, [[TMP19]]
+; CHECK-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <vscale x 2 x i64> poison, i64 [[TMP20]], i64 0
+; CHECK-NEXT: [[DOTSPLAT:%.*]] = shufflevector <vscale x 2 x i64> [[DOTSPLATINSERT]], <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer
+; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <vscale x 2 x i64> poison, i64 [[MUL_2_I]], i64 0
+; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <vscale x 2 x i64> [[BROADCAST_SPLATINSERT]], <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer
+; CHECK-NEXT: [[BROADCAST_SPLATINSERT1:%.*]] = insertelement <vscale x 2 x i64> poison, i64 [[MUL_1_I]], i64 0
+; CHECK-NEXT: [[BROADCAST_SPLAT2:%.*]] = shufflevector <vscale x 2 x i64> [[BROADCAST_SPLATINSERT1]], <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer
+; CHECK-NEXT: [[BROADCAST_SPLATINSERT3:%.*]] = insertelement <vscale x 2 x i64> poison, i64 [[X]], i64 0
+; CHECK-NEXT: [[BROADCAST_SPLAT4:%.*]] = shufflevector <vscale x 2 x i64> [[BROADCAST_SPLATINSERT3]], <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer
+; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
+; CHECK: [[VECTOR_BODY]]:
+; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
+; CHECK-NEXT: [[ACTIVE_LANE_MASK:%.*]] = phi <vscale x 2 x i1> [ [[ACTIVE_LANE_MASK_ENTRY]], %[[VECTOR_PH]] ], [ [[ACTIVE_LANE_MASK_NEXT:%.*]], %[[VECTOR_BODY]] ]
+; CHECK-NEXT: [[VEC_IND:%.*]] = phi <vscale x 2 x i64> [ [[INDUCTION]], %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]
+; CHECK-NEXT: [[TMP21:%.*]] = select <vscale x 2 x i1> [[ACTIVE_LANE_MASK]], <vscale x 2 x i64> [[BROADCAST_SPLAT]], <vscale x 2 x i64> shufflevector (<vscale x 2 x i64> insertelement (<vscale x 2 x i64> poison, i64 1, i64 0), <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer)
+; CHECK-NEXT: [[TMP22:%.*]] = udiv <vscale x 2 x i64> [[VEC_IND]], [[TMP21]]
+; CHECK-NEXT: [[TMP23:%.*]] = select <vscale x 2 x i1> [[ACTIVE_LANE_MASK]], <vscale x 2 x i64> [[BROADCAST_SPLAT]], <vscale x 2 x i64> shufflevector (<vscale x 2 x i64> insertelement (<vscale x 2 x i64> poison, i64 1, i64 0), <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer)
+; CHECK-NEXT: [[TMP24:%.*]] = urem <vscale x 2 x i64> [[VEC_IND]], [[TMP23]]
+; CHECK-NEXT: [[TMP25:%.*]] = select <vscale x 2 x i1> [[ACTIVE_LANE_MASK]], <vscale x 2 x i64> [[BROADCAST_SPLAT2]], <vscale x 2 x i64> shufflevector (<vscale x 2 x i64> insertelement (<vscale x 2 x i64> poison, i64 1, i64 0), <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer)
+; CHECK-NEXT: [[TMP26:%.*]] = udiv <vscale x 2 x i64> [[TMP24]], [[TMP25]]
+; CHECK-NEXT: [[TMP27:%.*]] = select <vscale x 2 x i1> [[ACTIVE_LANE_MASK]], <vscale x 2 x i64> [[BROADCAST_SPLAT2]], <vscale x 2 x i64> shufflevector (<vscale x 2 x i64> insertelement (<vscale x 2 x i64> poison, i64 1, i64 0), <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer)
+; CHECK-NEXT: [[TMP28:%.*]] = urem <vscale x 2 x i64> [[TMP24]], [[TMP27]]
+; CHECK-NEXT: [[TMP29:%.*]] = select <vscale x 2 x i1> [[ACTIVE_LANE_MASK]], <vscale x 2 x i64> [[BROADCAST_SPLAT4]], <vscale x 2 x i64> shufflevector (<vscale x 2 x i64> insertelement (<vscale x 2 x i64> poison, i64 1, i64 0), <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer)
+; CHECK-NEXT: [[TMP30:%.*]] = udiv <vscale x 2 x i64> [[TMP28]], [[TMP29]]
+; CHECK-NEXT: [[TMP31:%.*]] = select <vscale x 2 x i1> [[ACTIVE_LANE_MASK]], <vscale x 2 x i64> [[BROADCAST_SPLAT4]], <vscale x 2 x i64> shufflevector (<vscale x 2 x i64> insertelement (<vscale x 2 x i64> poison, i64 1, i64 0), <vscale x 2 x i64> poison, <vscale x 2 x i32> zeroinitializer)
+; CHECK-NEXT: [[TMP32:%.*]] = urem <vscale x 2 x i64> [[TMP28]], [[TMP31]]
+; CHECK-NEXT: [[TMP33:%.*]] = extractelement <vscale x 2 x i64> [[TMP22]], i32 0
+; CHECK-NEXT: [[TMP34:%.*]] = mul i64 [[X]], [[TMP33]]
+; CHECK-NEXT: [[TMP35:%.*]] = extractelement <vscale x 2 x i64> [[TMP26]], i32 0
+; CHECK-NEXT: [[TMP36:%.*]] = add i64 [[TMP34]], [[TMP35]]
+; CHECK-NEXT: [[TMP37:%.*]] = mul i64 [[TMP36]], [[X]]
+; CHECK-NEXT: [[TMP38:%.*]] = extractelement <vscale x 2 x i64> [[TMP30]], i32 0
+; CHECK-NEXT: [[TMP39:%.*]] = add i64 [[TMP37]], [[TMP38]]
+; CHECK-NEXT: [[TMP40:%.*]] = mul i64 [[TMP39]], [[X]]
+; CHECK-NEXT: [[TMP41:%.*]] = extractelement <vscale x 2 x i64> [[TMP32]], i32 0
+; CHECK-NEXT: [[TMP42:%.*]] = add i64 [[TMP40]], [[TMP41]]
+; CHECK-NEXT: [[TMP43:%.*]] = shl i64 [[TMP42]], 32
+; CHECK-NEXT: [[TMP44:%.*]] = ashr i64 [[TMP43]], 32
+; CHECK-NEXT: [[TMP45:%.*]] = getelementptr i64, ptr [[DST]], i64 [[TMP44]]
+; CHECK-NEXT: [[TMP46:%.*]] = getelementptr i64, ptr [[TMP45]], i32 0
+; CHECK-NEXT: call void @llvm.masked.store.nxv2i64.p0(<vscale x 2 x i64> [[TMP22]], ptr [[TMP46]], i32 4, <vscale x 2 x i1> [[ACTIVE_LANE_MASK]])
+; CHECK-NEXT: [[INDEX_NEXT]] = add i64 [[INDEX]], [[TMP9]]
+; CHECK-NEXT: [[ACTIVE_LANE_MASK_NEXT]] = call <vscale x 2 x i1> @llvm.get.active.lane.mask.nxv2i1.i64(i64 [[INDEX]], i64 [[TMP14]])
+; CHECK-NEXT: [[TMP47:%.*]] = xor <vscale x 2 x i1> [[ACTIVE_LANE_MASK_NEXT]], shufflevector (<vscale x 2 x i1> insertelement (<vscale x 2 x i1> poison, i1 true, i64 0), <vscale x 2 x i1> poison, <vscale x 2 x i32> zeroinitializer)
+; CHECK-NEXT: [[VEC_IND_NEXT]] = add <vscale x 2 x i64> [[VEC_IND]], [[DOTSPLAT]]
+; CHECK-NEXT: [[TMP48:%.*]] = extractelement <vscale x 2 x i1> [[TMP47]], i32 0
+; CHECK-NEXT: br i1 [[TMP48]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP6:![0-9]+]]
+; CHECK: [[MIDDLE_BLOCK]]:
+; CHECK-NEXT: br i1 true, label %[[EXIT:.*]], label %[[SCALAR_PH]]
+; CHECK: [[SCALAR_PH]]:
+; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ], [ 0, %[[VECTOR_SCEVCHECK]] ]
+; CHECK-NEXT: br label %[[LOOP:.*]]
+; CHECK: [[LOOP]]:
+; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
+; CHECK-NEXT: [[DIV_I:%.*]] = udiv i64 [[IV]], [[MUL_2_I]]
+; CHECK-NEXT: [[REM_I:%.*]] = urem i64 [[IV]], [[MUL_2_I]]
+; CHECK-NEXT: [[DIV_1_I:%.*]] = udiv i64 [[REM_I]], [[MUL_1_I]]
+; CHECK-NEXT: [[REM_1_I:%.*]] = urem i64 [[REM_I]], [[MUL_1_I]]
+; CHECK-NEXT: [[DIV_2_I:%.*]] = udiv i64 [[REM_1_I]], [[X]]
+; CHECK-NEXT: [[REM_2_I:%.*]] = urem i64 [[REM_1_I]], [[X]]
+; CHECK-NEXT: [[MUL_I:%.*]] = mul i64 [[X]], [[DIV_I]]
+; CHECK-NEXT: [[ADD_I:%.*]] = add i64 [[MUL_I]], [[DIV_1_I]]
+; CHECK-NEXT: [[MUL_1_I9:%.*]] = mul i64 [[ADD_I]], [[X]]
+; CHECK-NEXT: [[ADD_1_I:%.*]] = add i64 [[MUL_1_I9]], [[DIV_2_I]]
+; CHECK-NEXT: [[MUL_2_I11:%.*]] = mul i64 [[ADD_1_I]], [[X]]
+; CHECK-NEXT: [[ADD_2_I:%.*]] = add i64 [[MUL_2_I11]], [[REM_2_I]]
+; CHECK-NEXT: [[SEXT_I:%.*]] = shl i64 [[ADD_2_I]], 32
+; CHECK-NEXT: [[CONV6_I:%.*]] = ashr i64 [[SEXT_I]], 32
+; CHECK-NEXT: [[GEP:%.*]] = getelementptr i64, ptr [[DST]], i64 [[CONV6_I]]
+; CHECK-NEXT: store i64 [[DIV_I]], ptr [[GEP]], align 4
+; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1
+; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV]], [[N]]
+; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP7:![0-9]+]]
+; CHECK: [[EXIT]]:
+; CHECK-NEXT: ret void
+;
+entry:
+ %mul.1.i = mul i64 %x, %x
+ %mul.2.i = mul i64 %mul.1.i, %x
+ br label %loop
+
+loop:
+ %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
+ %div.i = udiv i64 %iv, %mul.2.i
+ %rem.i = urem i64 %iv, %mul.2.i
+ %div.1.i = udiv i64 %rem.i, %mul.1.i
+ %rem.1.i = urem i64 %rem.i, %mul.1.i
+ %div.2.i = udiv i64 %rem.1.i, %x
+ %rem.2.i = urem i64 %rem.1.i, %x
+ %mul.i = mul i64 %x, %div.i
+ %add.i = add i64 %mul.i, %div.1.i
+ %mul.1.i9 = mul i64 %add.i, %x
+ %add.1.i = add i64 %mul.1.i9, %div.2.i
+ %mul.2.i11 = mul i64 %add.1.i, %x
+ %add.2.i = add i64 %mul.2.i11, %rem.2.i
+ %sext.i = shl i64 %add.2.i, 32
+ %conv6.i = ashr i64 %sext.i, 32
+ %gep = getelementptr i64, ptr %dst, i64 %conv6.i
+ store i64 %div.i, ptr %gep, align 4
+ %iv.next = add i64 %iv, 1
+ %exitcond.not = icmp eq i64 %iv, %N
+ br i1 %exitcond.not, label %exit, label %loop
+
+exit:
+ ret void
+}
+;.
+; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
+; CHECK: [[META1]] = !{!"llvm.loop.isvectorized", i32 1}
+; CHECK: [[META2]] = !{!"llvm.loop.unroll.runtime.disable"}
+; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META1]]}
+; CHECK: [[LOOP4]] = distinct !{[[LOOP4]], [[META1]], [[META2]]}
+; CHECK: [[LOOP5]] = distinct !{[[LOOP5]], [[META1]]}
+; CHECK: [[LOOP6]] = distinct !{[[LOOP6]], [[META1]], [[META2]]}
+; CHECK: [[LOOP7]] = distinct !{[[LOOP7]], [[META1]]}
+;.
diff --git a/llvm/test/Transforms/LoopVectorize/X86/consecutive-ptr-uniforms.ll b/llvm/test/Transforms/LoopVectorize/X86/consecutive-ptr-uniforms.ll
index bee5b397ecb47..bb35806cea20a 100644
--- a/llvm/test/Transforms/LoopVectorize/X86/consecutive-ptr-uniforms.ll
+++ b/llvm/test/Transforms/LoopVectorize/X86/consecutive-ptr-uniforms.ll
@@ -76,7 +76,7 @@ attributes #0 = { "target-cpu"="knl" }
; CHECK: LV: Found trip count: 3
; CHECK: LV: Found uniform instruction: {{%.*}} = icmp eq i32 {{%.*}}, 0
; CHECK-NOT: LV: Found uniform instruction: {{%.*}} = load i32, ptr {{%.*}}, align 1
-; CHECK: LV: Found not uniform being ScalarWithPredication: {{%.*}} = load i32, ptr {{%.*}}, align 1
+; CHECK: LV: Found not uniform due to requiring predication: {{%.*}} = load i32, ptr {{%.*}}, align 1
; CHECK: LV: Found scalar instruction: {{%.*}} = getelementptr inbounds [3 x i32], ptr @a, i32 0, i32 {{%.*}}
;
; FORCE-LABEL: @PR40816(
>From e3293bb2e7330d876ddab55b0f8d33b3ea4bc19d Mon Sep 17 00:00:00 2001
From: Florian Hahn <flo at fhahn.com>
Date: Fri, 19 Jul 2024 09:09:52 +0100
Subject: [PATCH 2/2] !fixup address comments, thanks!
---
llvm/lib/Transforms/Vectorize/LoopVectorize.cpp | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index 9667b72563807..cceed75aa50b0 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -3914,10 +3914,9 @@ void LoopVectorizationCostModel::collectLoopUniforms(ElementCount VF) {
SetVector<Instruction *> Worklist;
// Add uniform instructions demanding lane 0 to the worklist. Instructions
- // that are require predication must not be considered uniform after
+ // that require predication must not be considered uniform after
// vectorization, because that would create an erroneous replicating region
// where only a single instance out of VF should be formed.
- // TODO: optimize such seldom cases if found important, see PR40816.
auto addToWorklistIfAllowed = [&](Instruction *I) -> void {
if (isOutOfScope(I)) {
LLVM_DEBUG(dbgs() << "LV: Found not uniform due to scope: "
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