[clang] [clang-tools-extra] [libcxx] [llvm] [lldb] [libcxxabi] [lld] [libc] [flang] [compiler-rt] [libclc] [VPlan] Add new VPScalarCastRecipe, use for IV & step trunc. (PR #78113)
via cfe-commits
cfe-commits at lists.llvm.org
Thu Jan 25 07:55:17 PST 2024
================
@@ -491,19 +491,41 @@ void VPlanTransforms::removeDeadRecipes(VPlan &Plan) {
static VPValue *createScalarIVSteps(VPlan &Plan, const InductionDescriptor &ID,
ScalarEvolution &SE, Instruction *TruncI,
- Type *IVTy, VPValue *StartV,
- VPValue *Step) {
+ VPValue *StartV, VPValue *Step) {
VPBasicBlock *HeaderVPBB = Plan.getVectorLoopRegion()->getEntryBasicBlock();
auto IP = HeaderVPBB->getFirstNonPhi();
VPCanonicalIVPHIRecipe *CanonicalIV = Plan.getCanonicalIV();
- Type *TruncTy = TruncI ? TruncI->getType() : IVTy;
VPValue *BaseIV = CanonicalIV;
- if (!CanonicalIV->isCanonical(ID.getKind(), StartV, Step, TruncTy)) {
- BaseIV = new VPDerivedIVRecipe(ID, StartV, CanonicalIV, Step,
- TruncI ? TruncI->getType() : nullptr);
+ VPTypeAnalysis TypeInfo(SE.getContext());
+ Type *StepTy = TypeInfo.inferScalarType(Step);
+ if (!CanonicalIV->isCanonical(ID.getKind(), StartV, Step)) {
+ BaseIV = new VPDerivedIVRecipe(ID, StartV, CanonicalIV, Step);
HeaderVPBB->insert(BaseIV->getDefiningRecipe(), IP);
}
+ // Truncate base induction if needed.
+ if (TruncI) {
+ Type *TruncTy = TruncI->getType();
+ assert(TypeInfo.inferScalarType(BaseIV)->getScalarSizeInBits() >
+ TruncTy->getScalarSizeInBits() &&
+ StepTy->isIntegerTy() && "Truncation requires an integer step");
----------------
ayalz wrote:
```suggestion
assert(ResultTy->getScalarSizeInBits() >
TruncTy->getScalarSizeInBits() &&
ResultTy->isIntegerTy() && "Truncation requires an integer type");
```
https://github.com/llvm/llvm-project/pull/78113
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