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[ConstantFold] Fold more operations to poison

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This patch folds more operations to poison.

Alive2 proof: https://alive2.llvm.org/ce/z/mxcb9G (it does not contain tests about div/rem because they fold to poison when raising UB)

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D92270
This commit is contained in:
Juneyoung Lee 2020-11-29 04:26:44 +09:00
parent e5f43fdeb3
commit 45b0ec5d7b
33 changed files with 145 additions and 130 deletions
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59
lib/IR/ConstantFold.cpp
View File

@ -630,7 +630,7 @@ Constant *llvm::ConstantFoldCastInstruction(unsigned opc, Constant *V,
V.convertToInteger(IntVal, APFloat::rmTowardZero, &ignored)) {
// Undefined behavior invoked - the destination type can't represent
// the input constant.
return UndefValue::get(DestTy);
return PoisonValue::get(DestTy);
}
return ConstantInt::get(FPC->getContext(), IntVal);
}
@ -916,7 +916,7 @@ Constant *llvm::ConstantFoldInsertElementInstruction(Constant *Val,
unsigned NumElts = ValTy->getNumElements();
if (CIdx->uge(NumElts))
return UndefValue::get(Val->getType());
return PoisonValue::get(Val->getType());
SmallVector<Constant*, 16> Result;
Result.reserve(NumElts);
@ -1144,23 +1144,21 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode, Constant *C1,
}
case Instruction::SDiv:
case Instruction::UDiv:
// X / undef -> undef
if (isa<UndefValue>(C2))
return C2;
// undef / 0 -> undef
// X / undef -> poison
// X / 0 -> poison
if (match(C2, m_CombineOr(m_Undef(), m_Zero())))
return PoisonValue::get(C2->getType());
// undef / 1 -> undef
if (match(C2, m_Zero()) || match(C2, m_One()))
if (match(C2, m_One()))
return C1;
// undef / X -> 0 otherwise
return Constant::getNullValue(C1->getType());
case Instruction::URem:
case Instruction::SRem:
// X % undef -> undef
if (match(C2, m_Undef()))
return C2;
// undef % 0 -> undef
if (match(C2, m_Zero()))
return C1;
// X % undef -> poison
// X % 0 -> poison
if (match(C2, m_CombineOr(m_Undef(), m_Zero())))
return PoisonValue::get(C2->getType());
// undef % X -> 0 otherwise
return Constant::getNullValue(C1->getType());
case Instruction::Or: // X | undef -> -1
@ -1168,28 +1166,28 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode, Constant *C1,
return C1;
return Constant::getAllOnesValue(C1->getType()); // undef | X -> ~0
case Instruction::LShr:
// X >>l undef -> undef
// X >>l undef -> poison
if (isa<UndefValue>(C2))
return C2;
return PoisonValue::get(C2->getType());
// undef >>l 0 -> undef
if (match(C2, m_Zero()))
return C1;
// undef >>l X -> 0
return Constant::getNullValue(C1->getType());
case Instruction::AShr:
// X >>a undef -> undef
// X >>a undef -> poison
if (isa<UndefValue>(C2))
return C2;
return PoisonValue::get(C2->getType());
// undef >>a 0 -> undef
if (match(C2, m_Zero()))
return C1;
// TODO: undef >>a X -> undef if the shift is exact
// TODO: undef >>a X -> poison if the shift is exact
// undef >>a X -> 0
return Constant::getNullValue(C1->getType());
case Instruction::Shl:
// X << undef -> undef
if (isa<UndefValue>(C2))
return C2;
return PoisonValue::get(C2->getType());
// undef << 0 -> undef
if (match(C2, m_Zero()))
return C1;
@ -1242,14 +1240,14 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode, Constant *C1,
if (CI2->isOne())
return C1; // X / 1 == X
if (CI2->isZero())
return UndefValue::get(CI2->getType()); // X / 0 == undef
return PoisonValue::get(CI2->getType()); // X / 0 == poison
break;
case Instruction::URem:
case Instruction::SRem:
if (CI2->isOne())
return Constant::getNullValue(CI2->getType()); // X % 1 == 0
if (CI2->isZero())
return UndefValue::get(CI2->getType()); // X % 0 == undef
return PoisonValue::get(CI2->getType()); // X % 0 == poison
break;
case Instruction::And:
if (CI2->isZero()) return C2; // X & 0 == 0
@ -1363,7 +1361,7 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode, Constant *C1,
case Instruction::SDiv:
assert(!CI2->isZero() && "Div by zero handled above");
if (C2V.isAllOnesValue() && C1V.isMinSignedValue())
return UndefValue::get(CI1->getType()); // MIN_INT / -1 -> undef
return PoisonValue::get(CI1->getType()); // MIN_INT / -1 -> poison
return ConstantInt::get(CI1->getContext(), C1V.sdiv(C2V));
case Instruction::URem:
assert(!CI2->isZero() && "Div by zero handled above");
@ -1371,7 +1369,7 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode, Constant *C1,
case Instruction::SRem:
assert(!CI2->isZero() && "Div by zero handled above");
if (C2V.isAllOnesValue() && C1V.isMinSignedValue())
return UndefValue::get(CI1->getType()); // MIN_INT % -1 -> undef
return PoisonValue::get(CI1->getType()); // MIN_INT % -1 -> poison
return ConstantInt::get(CI1->getContext(), C1V.srem(C2V));
case Instruction::And:
return ConstantInt::get(CI1->getContext(), C1V & C2V);
@ -1382,15 +1380,15 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode, Constant *C1,
case Instruction::Shl:
if (C2V.ult(C1V.getBitWidth()))
return ConstantInt::get(CI1->getContext(), C1V.shl(C2V));
return UndefValue::get(C1->getType()); // too big shift is undef
return PoisonValue::get(C1->getType()); // too big shift is poison
case Instruction::LShr:
if (C2V.ult(C1V.getBitWidth()))
return ConstantInt::get(CI1->getContext(), C1V.lshr(C2V));
return UndefValue::get(C1->getType()); // too big shift is undef
return PoisonValue::get(C1->getType()); // too big shift is poison
case Instruction::AShr:
if (C2V.ult(C1V.getBitWidth()))
return ConstantInt::get(CI1->getContext(), C1V.ashr(C2V));
return UndefValue::get(C1->getType()); // too big shift is undef
return PoisonValue::get(C1->getType()); // too big shift is poison
}
}
@ -1436,7 +1434,7 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode, Constant *C1,
// Fast path for splatted constants.
if (Constant *C2Splat = C2->getSplatValue()) {
if (Instruction::isIntDivRem(Opcode) && C2Splat->isNullValue())
return UndefValue::get(VTy);
return PoisonValue::get(VTy);
if (Constant *C1Splat = C1->getSplatValue()) {
return ConstantVector::getSplat(
VTy->getElementCount(),
@ -1453,9 +1451,9 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode, Constant *C1,
Constant *LHS = ConstantExpr::getExtractElement(C1, ExtractIdx);
Constant *RHS = ConstantExpr::getExtractElement(C2, ExtractIdx);
// If any element of a divisor vector is zero, the whole op is undef.
// If any element of a divisor vector is zero, the whole op is poison.
if (Instruction::isIntDivRem(Opcode) && RHS->isNullValue())
return UndefValue::get(VTy);
return PoisonValue::get(VTy);
Result.push_back(ConstantExpr::get(Opcode, LHS, RHS));
}
@ -2338,7 +2336,8 @@ Constant *llvm::ConstantFoldGetElementPtr(Type *PointeeTy, Constant *C,
return PoisonValue::get(GEPTy);
if (isa<UndefValue>(C))
return UndefValue::get(GEPTy);
// If inbounds, we can choose an out-of-bounds pointer as a base pointer.
return InBounds ? PoisonValue::get(GEPTy) : UndefValue::get(GEPTy);
Constant *Idx0 = cast<Constant>(Idxs[0]);
if (Idxs.size() == 1 && (Idx0->isNullValue() || isa<UndefValue>(Idx0)))

2
test/CodeGen/AMDGPU/amdgpu-codegenprepare-fold-binop-select.ll
View File

@ -42,7 +42,7 @@ define i32 @select_sdiv_rhs_const_i32(i1 %cond) {
define <2 x i32> @select_sdiv_lhs_const_v2i32(i1 %cond) {
; IR-LABEL: @select_sdiv_lhs_const_v2i32(
; IR-NEXT: [[OP:%.*]] = select i1 [[COND:%.*]], <2 x i32> <i32 666, i32 undef>, <2 x i32> <i32 555, i32 1428>
; IR-NEXT: [[OP:%.*]] = select i1 [[COND:%.*]], <2 x i32> <i32 666, i32 poison>, <2 x i32> <i32 555, i32 1428>
; IR-NEXT: ret <2 x i32> [[OP]]
;
; GCN-LABEL: select_sdiv_lhs_const_v2i32:

2
test/Transforms/InstCombine/apint-shift.ll
View File

@ -337,7 +337,7 @@ define <2 x i1> @test16vec_nonuniform(<2 x i84> %X) {
define <2 x i1> @test16vec_undef(<2 x i84> %X) {
; CHECK-LABEL: @test16vec_undef(
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i84> [[X:%.*]], <i84 16, i84 undef>
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i84> [[X:%.*]], <i84 16, i84 poison>
; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i84> [[TMP1]], zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;

2
test/Transforms/InstCombine/canonicalize-ashr-shl-to-masking.ll
View File

@ -418,7 +418,7 @@ define <3 x i8> @positive_sameconst_vec_undef1(<3 x i8> %x) {
define <3 x i8> @positive_sameconst_vec_undef2(<3 x i8> %x) {
; CHECK-LABEL: @positive_sameconst_vec_undef2(
; CHECK-NEXT: [[RET:%.*]] = and <3 x i8> [[X:%.*]], <i8 -8, i8 undef, i8 -8>
; CHECK-NEXT: [[RET:%.*]] = and <3 x i8> [[X:%.*]], <i8 -8, i8 poison, i8 -8>
; CHECK-NEXT: ret <3 x i8> [[RET]]
;
%tmp0 = ashr <3 x i8> %x, <i8 3, i8 undef, i8 3>

2
test/Transforms/InstCombine/canonicalize-lshr-shl-to-masking.ll
View File

@ -418,7 +418,7 @@ define <3 x i8> @positive_sameconst_vec_undef1(<3 x i8> %x) {
define <3 x i8> @positive_sameconst_vec_undef2(<3 x i8> %x) {
; CHECK-LABEL: @positive_sameconst_vec_undef2(
; CHECK-NEXT: [[RET:%.*]] = and <3 x i8> [[X:%.*]], <i8 -8, i8 undef, i8 -8>
; CHECK-NEXT: [[RET:%.*]] = and <3 x i8> [[X:%.*]], <i8 -8, i8 poison, i8 -8>
; CHECK-NEXT: ret <3 x i8> [[RET]]
;
%tmp0 = lshr <3 x i8> %x, <i8 3, i8 undef, i8 3>

2
test/Transforms/InstCombine/canonicalize-shl-lshr-to-masking.ll
View File

@ -171,7 +171,7 @@ define <3 x i32> @positive_sameconst_vec_undef1(<3 x i32> %x) {
define <3 x i32> @positive_sameconst_vec_undef2(<3 x i32> %x) {
; CHECK-LABEL: @positive_sameconst_vec_undef2(
; CHECK-NEXT: [[RET:%.*]] = and <3 x i32> [[X:%.*]], <i32 134217727, i32 undef, i32 134217727>
; CHECK-NEXT: [[RET:%.*]] = and <3 x i32> [[X:%.*]], <i32 134217727, i32 poison, i32 134217727>
; CHECK-NEXT: ret <3 x i32> [[RET]]
;
%tmp0 = shl <3 x i32> %x, <i32 5, i32 undef, i32 5>

4
test/Transforms/InstCombine/icmp.ll
View File

@ -2784,7 +2784,7 @@ define <2 x i1> @icmp_and_or_lshr_cst_vec_nonuniform(<2 x i32> %x) {
define <2 x i1> @icmp_and_or_lshr_cst_vec_undef(<2 x i32> %x) {
; CHECK-LABEL: @icmp_and_or_lshr_cst_vec_undef(
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> [[X:%.*]], <i32 3, i32 -1>
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> [[X:%.*]], <i32 3, i32 poison>
; CHECK-NEXT: [[RET:%.*]] = icmp ne <2 x i32> [[TMP1]], zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[RET]]
;
@ -2828,7 +2828,7 @@ define <2 x i1> @icmp_and_or_lshr_cst_vec_nonuniform_commute(<2 x i32> %xp) {
define <2 x i1> @icmp_and_or_lshr_cst_vec_undef_commute(<2 x i32> %xp) {
; CHECK-LABEL: @icmp_and_or_lshr_cst_vec_undef_commute(
; CHECK-NEXT: [[X:%.*]] = srem <2 x i32> [[XP:%.*]], <i32 42, i32 42>
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> [[X]], <i32 3, i32 -1>
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> [[X]], <i32 3, i32 poison>
; CHECK-NEXT: [[RET:%.*]] = icmp ne <2 x i32> [[TMP1]], zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[RET]]
;

4
test/Transforms/InstCombine/partally-redundant-left-shift-input-masking-after-truncation-variant-a.ll
View File

@ -103,7 +103,7 @@ define <8 x i32> @t2_vec_splat_undef(<8 x i64> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T4]])
; CHECK-NEXT: [[TMP1:%.*]] = trunc <8 x i64> [[X:%.*]] to <8 x i32>
; CHECK-NEXT: [[TMP2:%.*]] = shl <8 x i32> [[TMP1]], [[T4]]
; CHECK-NEXT: [[T7:%.*]] = and <8 x i32> [[TMP2]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 undef, i32 2147483647>
; CHECK-NEXT: [[T7:%.*]] = and <8 x i32> [[TMP2]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 poison, i32 2147483647>
; CHECK-NEXT: ret <8 x i32> [[T7]]
;
%t0 = add <8 x i32> %nbits, <i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 undef, i32 -1>
@ -138,7 +138,7 @@ define <8 x i32> @t3_vec_nonsplat(<8 x i64> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T4]])
; CHECK-NEXT: [[TMP1:%.*]] = trunc <8 x i64> [[X:%.*]] to <8 x i32>
; CHECK-NEXT: [[TMP2:%.*]] = shl <8 x i32> [[TMP1]], [[T4]]
; CHECK-NEXT: [[T7:%.*]] = and <8 x i32> [[TMP2]], <i32 undef, i32 0, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 -1>
; CHECK-NEXT: [[T7:%.*]] = and <8 x i32> [[TMP2]], <i32 poison, i32 0, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 -1>
; CHECK-NEXT: ret <8 x i32> [[T7]]
;
%t0 = add <8 x i32> %nbits, <i32 -33, i32 -32, i32 -31, i32 -1, i32 0, i32 1, i32 31, i32 32>

4
test/Transforms/InstCombine/partally-redundant-left-shift-input-masking-after-truncation-variant-b.ll
View File

@ -103,7 +103,7 @@ define <8 x i32> @t2_vec_splat_undef(<8 x i64> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T4]])
; CHECK-NEXT: [[TMP1:%.*]] = trunc <8 x i64> [[X:%.*]] to <8 x i32>
; CHECK-NEXT: [[TMP2:%.*]] = shl <8 x i32> [[TMP1]], [[T4]]
; CHECK-NEXT: [[T7:%.*]] = and <8 x i32> [[TMP2]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 undef, i32 2147483647>
; CHECK-NEXT: [[T7:%.*]] = and <8 x i32> [[TMP2]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 poison, i32 2147483647>
; CHECK-NEXT: ret <8 x i32> [[T7]]
;
%t0 = add <8 x i32> %nbits, <i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 undef, i32 -1>
@ -138,7 +138,7 @@ define <8 x i32> @t3_vec_nonsplat(<8 x i64> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T4]])
; CHECK-NEXT: [[TMP1:%.*]] = trunc <8 x i64> [[X:%.*]] to <8 x i32>
; CHECK-NEXT: [[TMP2:%.*]] = shl <8 x i32> [[TMP1]], [[T4]]
; CHECK-NEXT: [[T7:%.*]] = and <8 x i32> [[TMP2]], <i32 undef, i32 0, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 -1>
; CHECK-NEXT: [[T7:%.*]] = and <8 x i32> [[TMP2]], <i32 poison, i32 0, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 -1>
; CHECK-NEXT: ret <8 x i32> [[T7]]
;
%t0 = add <8 x i32> %nbits, <i32 -33, i32 -32, i32 -31, i32 -1, i32 0, i32 1, i32 31, i32 32>

4
test/Transforms/InstCombine/partally-redundant-left-shift-input-masking-after-truncation-variant-c.ll
View File

@ -83,7 +83,7 @@ define <8 x i32> @t2_vec_splat_undef(<8 x i64> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T2]])
; CHECK-NEXT: [[TMP1:%.*]] = trunc <8 x i64> [[X:%.*]] to <8 x i32>
; CHECK-NEXT: [[TMP2:%.*]] = shl <8 x i32> [[TMP1]], [[T2]]
; CHECK-NEXT: [[T5:%.*]] = and <8 x i32> [[TMP2]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 undef, i32 2147483647>
; CHECK-NEXT: [[T5:%.*]] = and <8 x i32> [[TMP2]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 poison, i32 2147483647>
; CHECK-NEXT: ret <8 x i32> [[T5]]
;
%t0 = zext <8 x i32> %nbits to <8 x i64>
@ -110,7 +110,7 @@ define <8 x i32> @t3_vec_nonsplat(<8 x i64> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T2]])
; CHECK-NEXT: [[TMP1:%.*]] = trunc <8 x i64> [[X:%.*]] to <8 x i32>
; CHECK-NEXT: [[TMP2:%.*]] = shl <8 x i32> [[TMP1]], [[T2]]
; CHECK-NEXT: [[T5:%.*]] = and <8 x i32> [[TMP2]], <i32 undef, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 undef, i32 undef>
; CHECK-NEXT: [[T5:%.*]] = and <8 x i32> [[TMP2]], <i32 poison, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 poison, i32 poison>
; CHECK-NEXT: ret <8 x i32> [[T5]]
;
%t0 = zext <8 x i32> %nbits to <8 x i64>

4
test/Transforms/InstCombine/partally-redundant-left-shift-input-masking-after-truncation-variant-d.ll
View File

@ -93,7 +93,7 @@ define <8 x i32> @t2_vec_splat_undef(<8 x i64> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T3]])
; CHECK-NEXT: [[TMP1:%.*]] = trunc <8 x i64> [[X:%.*]] to <8 x i32>
; CHECK-NEXT: [[TMP2:%.*]] = shl <8 x i32> [[TMP1]], [[T3]]
; CHECK-NEXT: [[T6:%.*]] = and <8 x i32> [[TMP2]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 undef, i32 2147483647>
; CHECK-NEXT: [[T6:%.*]] = and <8 x i32> [[TMP2]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 poison, i32 2147483647>
; CHECK-NEXT: ret <8 x i32> [[T6]]
;
%t0 = zext <8 x i32> %nbits to <8 x i64>
@ -124,7 +124,7 @@ define <8 x i32> @t3_vec_nonsplat(<8 x i64> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T3]])
; CHECK-NEXT: [[TMP1:%.*]] = trunc <8 x i64> [[X:%.*]] to <8 x i32>
; CHECK-NEXT: [[TMP2:%.*]] = shl <8 x i32> [[TMP1]], [[T3]]
; CHECK-NEXT: [[T6:%.*]] = and <8 x i32> [[TMP2]], <i32 undef, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 undef, i32 undef>
; CHECK-NEXT: [[T6:%.*]] = and <8 x i32> [[TMP2]], <i32 poison, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 poison, i32 poison>
; CHECK-NEXT: ret <8 x i32> [[T6]]
;
%t0 = zext <8 x i32> %nbits to <8 x i64>

4
test/Transforms/InstCombine/partally-redundant-left-shift-input-masking-after-truncation-variant-e.ll
View File

@ -83,7 +83,7 @@ define <8 x i32> @t2_vec_splat_undef(<8 x i64> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T2]])
; CHECK-NEXT: [[TMP1:%.*]] = trunc <8 x i64> [[X]] to <8 x i32>
; CHECK-NEXT: [[TMP2:%.*]] = shl <8 x i32> [[TMP1]], [[T2]]
; CHECK-NEXT: [[T5:%.*]] = and <8 x i32> [[TMP2]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 undef, i32 2147483647>
; CHECK-NEXT: [[T5:%.*]] = and <8 x i32> [[TMP2]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 poison, i32 2147483647>
; CHECK-NEXT: ret <8 x i32> [[T5]]
;
%t0 = zext <8 x i32> %nbits to <8 x i64>
@ -110,7 +110,7 @@ define <8 x i32> @t3_vec_nonsplat(<8 x i64> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T2]])
; CHECK-NEXT: [[TMP1:%.*]] = trunc <8 x i64> [[X]] to <8 x i32>
; CHECK-NEXT: [[TMP2:%.*]] = shl <8 x i32> [[TMP1]], [[T2]]
; CHECK-NEXT: [[T5:%.*]] = and <8 x i32> [[TMP2]], <i32 undef, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 undef, i32 undef>
; CHECK-NEXT: [[T5:%.*]] = and <8 x i32> [[TMP2]], <i32 poison, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 poison, i32 poison>
; CHECK-NEXT: ret <8 x i32> [[T5]]
;
%t0 = zext <8 x i32> %nbits to <8 x i64>

4
test/Transforms/InstCombine/partally-redundant-left-shift-input-masking-variant-a.ll
View File

@ -82,7 +82,7 @@ define <8 x i32> @t1_vec_splat_undef(<8 x i32> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T2]])
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T4]])
; CHECK-NEXT: [[TMP1:%.*]] = shl <8 x i32> [[X:%.*]], [[T4]]
; CHECK-NEXT: [[T5:%.*]] = and <8 x i32> [[TMP1]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 undef, i32 2147483647>
; CHECK-NEXT: [[T5:%.*]] = and <8 x i32> [[TMP1]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 poison, i32 2147483647>
; CHECK-NEXT: ret <8 x i32> [[T5]]
;
%t0 = add <8 x i32> %nbits, <i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 undef, i32 -1>
@ -109,7 +109,7 @@ define <8 x i32> @t2_vec_nonsplat(<8 x i32> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T2]])
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T4]])
; CHECK-NEXT: [[TMP1:%.*]] = shl <8 x i32> [[X:%.*]], [[T4]]
; CHECK-NEXT: [[T5:%.*]] = and <8 x i32> [[TMP1]], <i32 undef, i32 0, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 undef>
; CHECK-NEXT: [[T5:%.*]] = and <8 x i32> [[TMP1]], <i32 poison, i32 0, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 poison>
; CHECK-NEXT: ret <8 x i32> [[T5]]
;
%t0 = add <8 x i32> %nbits, <i32 -33, i32 -32, i32 -31, i32 -1, i32 0, i32 1, i32 31, i32 32>

4
test/Transforms/InstCombine/partally-redundant-left-shift-input-masking-variant-b.ll
View File

@ -82,7 +82,7 @@ define <8 x i32> @t1_vec_splat_undef(<8 x i32> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T2]])
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T4]])
; CHECK-NEXT: [[TMP1:%.*]] = shl <8 x i32> [[X:%.*]], [[T4]]
; CHECK-NEXT: [[T5:%.*]] = and <8 x i32> [[TMP1]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 undef, i32 2147483647>
; CHECK-NEXT: [[T5:%.*]] = and <8 x i32> [[TMP1]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 poison, i32 2147483647>
; CHECK-NEXT: ret <8 x i32> [[T5]]
;
%t0 = add <8 x i32> %nbits, <i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 undef, i32 -1>
@ -109,7 +109,7 @@ define <8 x i32> @t2_vec_nonsplat(<8 x i32> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T2]])
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T4]])
; CHECK-NEXT: [[TMP1:%.*]] = shl <8 x i32> [[X:%.*]], [[T4]]
; CHECK-NEXT: [[T5:%.*]] = and <8 x i32> [[TMP1]], <i32 undef, i32 0, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 undef>
; CHECK-NEXT: [[T5:%.*]] = and <8 x i32> [[TMP1]], <i32 poison, i32 0, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 poison>
; CHECK-NEXT: ret <8 x i32> [[T5]]
;
%t0 = add <8 x i32> %nbits, <i32 -33, i32 -32, i32 -31, i32 -1, i32 0, i32 1, i32 31, i32 32>

4
test/Transforms/InstCombine/partally-redundant-left-shift-input-masking-variant-c.ll
View File

@ -62,7 +62,7 @@ define <8 x i32> @t1_vec_splat_undef(<8 x i32> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T0]])
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T2]])
; CHECK-NEXT: [[TMP1:%.*]] = shl <8 x i32> [[X:%.*]], [[T2]]
; CHECK-NEXT: [[T3:%.*]] = and <8 x i32> [[TMP1]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 undef, i32 2147483647>
; CHECK-NEXT: [[T3:%.*]] = and <8 x i32> [[TMP1]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 poison, i32 2147483647>
; CHECK-NEXT: ret <8 x i32> [[T3]]
;
%t0 = lshr <8 x i32> <i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 undef, i32 -1>, %nbits
@ -81,7 +81,7 @@ define <8 x i32> @t1_vec_nonsplat(<8 x i32> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T0]])
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T2]])
; CHECK-NEXT: [[TMP1:%.*]] = shl <8 x i32> [[X:%.*]], [[T2]]
; CHECK-NEXT: [[T3:%.*]] = and <8 x i32> [[TMP1]], <i32 undef, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 -1, i32 undef>
; CHECK-NEXT: [[T3:%.*]] = and <8 x i32> [[TMP1]], <i32 poison, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 -1, i32 poison>
; CHECK-NEXT: ret <8 x i32> [[T3]]
;
%t0 = lshr <8 x i32> <i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1>, %nbits

4
test/Transforms/InstCombine/partally-redundant-left-shift-input-masking-variant-d.ll
View File

@ -72,7 +72,7 @@ define <8 x i32> @t2_vec_splat_undef(<8 x i32> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T1]])
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T3]])
; CHECK-NEXT: [[TMP1:%.*]] = shl <8 x i32> [[X:%.*]], [[T3]]
; CHECK-NEXT: [[T4:%.*]] = and <8 x i32> [[TMP1]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 undef, i32 2147483647>
; CHECK-NEXT: [[T4:%.*]] = and <8 x i32> [[TMP1]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 poison, i32 2147483647>
; CHECK-NEXT: ret <8 x i32> [[T4]]
;
%t0 = shl <8 x i32> <i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 undef, i32 -1>, %nbits
@ -95,7 +95,7 @@ define <8 x i32> @t2_vec_nonsplat(<8 x i32> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T1]])
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T3]])
; CHECK-NEXT: [[TMP1:%.*]] = shl <8 x i32> [[X:%.*]], [[T3]]
; CHECK-NEXT: [[T4:%.*]] = and <8 x i32> [[TMP1]], <i32 undef, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 -1, i32 undef>
; CHECK-NEXT: [[T4:%.*]] = and <8 x i32> [[TMP1]], <i32 poison, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 -1, i32 poison>
; CHECK-NEXT: ret <8 x i32> [[T4]]
;
%t0 = shl <8 x i32> <i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1>, %nbits

4
test/Transforms/InstCombine/partally-redundant-left-shift-input-masking-variant-e.ll
View File

@ -62,7 +62,7 @@ define <8 x i32> @t1_vec_splat_undef(<8 x i32> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T0]])
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T2]])
; CHECK-NEXT: [[TMP1:%.*]] = shl <8 x i32> [[X]], [[T2]]
; CHECK-NEXT: [[T3:%.*]] = and <8 x i32> [[TMP1]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 undef, i32 2147483647>
; CHECK-NEXT: [[T3:%.*]] = and <8 x i32> [[TMP1]], <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 poison, i32 2147483647>
; CHECK-NEXT: ret <8 x i32> [[T3]]
;
%t0 = shl <8 x i32> %x, %nbits
@ -81,7 +81,7 @@ define <8 x i32> @t1_vec_nonsplat(<8 x i32> %x, <8 x i32> %nbits) {
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T0]])
; CHECK-NEXT: call void @use8xi32(<8 x i32> [[T2]])
; CHECK-NEXT: [[TMP1:%.*]] = shl <8 x i32> [[X]], [[T2]]
; CHECK-NEXT: [[T3:%.*]] = and <8 x i32> [[TMP1]], <i32 undef, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 -1, i32 undef>
; CHECK-NEXT: [[T3:%.*]] = and <8 x i32> [[TMP1]], <i32 poison, i32 1, i32 2147483647, i32 -1, i32 -1, i32 -1, i32 -1, i32 poison>
; CHECK-NEXT: ret <8 x i32> [[T3]]
;
%t0 = shl <8 x i32> %x, %nbits

6
test/Transforms/InstCombine/select-of-bittest.ll
View File

@ -82,7 +82,7 @@ define <2 x i32> @and_lshr_and_vec_v2(<2 x i32> %arg) {
define <3 x i32> @and_lshr_and_vec_undef(<3 x i32> %arg) {
; CHECK-LABEL: @and_lshr_and_vec_undef(
; CHECK-NEXT: [[TMP1:%.*]] = and <3 x i32> [[ARG:%.*]], <i32 3, i32 undef, i32 3>
; CHECK-NEXT: [[TMP1:%.*]] = and <3 x i32> [[ARG:%.*]], <i32 3, i32 poison, i32 3>
; CHECK-NEXT: [[TMP2:%.*]] = icmp ne <3 x i32> [[TMP1]], zeroinitializer
; CHECK-NEXT: [[TMP4:%.*]] = zext <3 x i1> [[TMP2]] to <3 x i32>
; CHECK-NEXT: ret <3 x i32> [[TMP4]]
@ -91,6 +91,7 @@ define <3 x i32> @and_lshr_and_vec_undef(<3 x i32> %arg) {
%tmp1 = icmp eq <3 x i32> %tmp, <i32 0, i32 undef, i32 0>
%tmp2 = lshr <3 x i32> %arg, <i32 1, i32 undef, i32 1>
%tmp3 = and <3 x i32> %tmp2, <i32 1, i32 undef, i32 1>
; The second element of %tmp4 is poison because it is (undef ? poison : undef).
%tmp4 = select <3 x i1> %tmp1, <3 x i32> %tmp3, <3 x i32> <i32 1, i32 undef, i32 1>
ret <3 x i32> %tmp4
}
@ -222,7 +223,7 @@ define <2 x i32> @f_var0_vec(<2 x i32> %arg, <2 x i32> %arg1) {
define <3 x i32> @f_var0_vec_undef(<3 x i32> %arg, <3 x i32> %arg1) {
; CHECK-LABEL: @f_var0_vec_undef(
; CHECK-NEXT: [[TMP1:%.*]] = or <3 x i32> [[ARG1:%.*]], <i32 2, i32 undef, i32 2>
; CHECK-NEXT: [[TMP1:%.*]] = or <3 x i32> [[ARG1:%.*]], <i32 2, i32 poison, i32 2>
; CHECK-NEXT: [[TMP2:%.*]] = and <3 x i32> [[TMP1]], [[ARG:%.*]]
; CHECK-NEXT: [[TMP3:%.*]] = icmp ne <3 x i32> [[TMP2]], zeroinitializer
; CHECK-NEXT: [[TMP5:%.*]] = zext <3 x i1> [[TMP3]] to <3 x i32>
@ -232,6 +233,7 @@ define <3 x i32> @f_var0_vec_undef(<3 x i32> %arg, <3 x i32> %arg1) {
%tmp2 = icmp eq <3 x i32> %tmp, <i32 0, i32 undef, i32 0>
%tmp3 = lshr <3 x i32> %arg, <i32 1, i32 undef, i32 1>
%tmp4 = and <3 x i32> %tmp3, <i32 1, i32 undef, i32 1>
; The second element of %tmp5 is poison because it is (undef ? poison : undef).
%tmp5 = select <3 x i1> %tmp2, <3 x i32> %tmp4, <3 x i32> <i32 1, i32 undef, i32 1>
ret <3 x i32> %tmp5
}

12
test/Transforms/InstCombine/shift-add.ll
View File

@ -40,7 +40,7 @@ define i32 @lshr_C1_add_A_C2_i32(i32 %A) {
define <4 x i32> @shl_C1_add_A_C2_v4i32(<4 x i16> %A) {
; CHECK-LABEL: @shl_C1_add_A_C2_v4i32(
; CHECK-NEXT: [[B:%.*]] = zext <4 x i16> [[A:%.*]] to <4 x i32>
; CHECK-NEXT: [[D:%.*]] = shl <4 x i32> <i32 6, i32 4, i32 undef, i32 -458752>, [[B]]
; CHECK-NEXT: [[D:%.*]] = shl <4 x i32> <i32 6, i32 4, i32 poison, i32 -458752>, [[B]]
; CHECK-NEXT: ret <4 x i32> [[D]]
;
%B = zext <4 x i16> %A to <4 x i32>
@ -52,7 +52,7 @@ define <4 x i32> @shl_C1_add_A_C2_v4i32(<4 x i16> %A) {
define <4 x i32> @ashr_C1_add_A_C2_v4i32(<4 x i32> %A) {
; CHECK-LABEL: @ashr_C1_add_A_C2_v4i32(
; CHECK-NEXT: [[B:%.*]] = and <4 x i32> [[A:%.*]], <i32 0, i32 15, i32 255, i32 65535>
; CHECK-NEXT: [[D:%.*]] = ashr <4 x i32> <i32 6, i32 1, i32 undef, i32 -1>, [[B]]
; CHECK-NEXT: [[D:%.*]] = ashr <4 x i32> <i32 6, i32 1, i32 poison, i32 -1>, [[B]]
; CHECK-NEXT: ret <4 x i32> [[D]]
;
%B = and <4 x i32> %A, <i32 0, i32 15, i32 255, i32 65535>
@ -64,7 +64,7 @@ define <4 x i32> @ashr_C1_add_A_C2_v4i32(<4 x i32> %A) {
define <4 x i32> @lshr_C1_add_A_C2_v4i32(<4 x i32> %A) {
; CHECK-LABEL: @lshr_C1_add_A_C2_v4i32(
; CHECK-NEXT: [[B:%.*]] = and <4 x i32> [[A:%.*]], <i32 0, i32 15, i32 255, i32 65535>
; CHECK-NEXT: [[D:%.*]] = lshr <4 x i32> <i32 6, i32 1, i32 undef, i32 65535>, [[B]]
; CHECK-NEXT: [[D:%.*]] = lshr <4 x i32> <i32 6, i32 1, i32 poison, i32 65535>, [[B]]
; CHECK-NEXT: ret <4 x i32> [[D]]
;
%B = and <4 x i32> %A, <i32 0, i32 15, i32 255, i32 65535>
@ -78,7 +78,7 @@ define <4 x i32> @shl_C1_add_A_C2_v4i32_splat(i16 %I) {
; CHECK-NEXT: [[A:%.*]] = zext i16 [[I:%.*]] to i32
; CHECK-NEXT: [[B:%.*]] = insertelement <4 x i32> undef, i32 [[A]], i32 0
; CHECK-NEXT: [[C:%.*]] = shufflevector <4 x i32> [[B]], <4 x i32> undef, <4 x i32> zeroinitializer
; CHECK-NEXT: [[E:%.*]] = shl <4 x i32> <i32 6, i32 4, i32 undef, i32 -458752>, [[C]]
; CHECK-NEXT: [[E:%.*]] = shl <4 x i32> <i32 6, i32 4, i32 poison, i32 -458752>, [[C]]
; CHECK-NEXT: ret <4 x i32> [[E]]
;
%A = zext i16 %I to i32
@ -94,7 +94,7 @@ define <4 x i32> @ashr_C1_add_A_C2_v4i32_splat(i16 %I) {
; CHECK-NEXT: [[A:%.*]] = zext i16 [[I:%.*]] to i32
; CHECK-NEXT: [[B:%.*]] = insertelement <4 x i32> undef, i32 [[A]], i32 0
; CHECK-NEXT: [[C:%.*]] = shufflevector <4 x i32> [[B]], <4 x i32> undef, <4 x i32> zeroinitializer
; CHECK-NEXT: [[E:%.*]] = ashr <4 x i32> <i32 6, i32 1, i32 undef, i32 -1>, [[C]]
; CHECK-NEXT: [[E:%.*]] = ashr <4 x i32> <i32 6, i32 1, i32 poison, i32 -1>, [[C]]
; CHECK-NEXT: ret <4 x i32> [[E]]
;
%A = zext i16 %I to i32
@ -110,7 +110,7 @@ define <4 x i32> @lshr_C1_add_A_C2_v4i32_splat(i16 %I) {
; CHECK-NEXT: [[A:%.*]] = zext i16 [[I:%.*]] to i32
; CHECK-NEXT: [[B:%.*]] = insertelement <4 x i32> undef, i32 [[A]], i32 0
; CHECK-NEXT: [[C:%.*]] = shufflevector <4 x i32> [[B]], <4 x i32> undef, <4 x i32> zeroinitializer
; CHECK-NEXT: [[E:%.*]] = lshr <4 x i32> <i32 6, i32 1, i32 undef, i32 65535>, [[C]]
; CHECK-NEXT: [[E:%.*]] = lshr <4 x i32> <i32 6, i32 1, i32 poison, i32 65535>, [[C]]
; CHECK-NEXT: ret <4 x i32> [[E]]
;
%A = zext i16 %I to i32

2
test/Transforms/InstSimplify/ConstProp/InsertElement.ll
View File

@ -25,7 +25,7 @@ define <4 x i64> @insertelement() {
define <4 x i64> @insertelement_undef() {
; CHECK-LABEL: @insertelement_undef(
; CHECK-NEXT: ret <4 x i64> undef
; CHECK-NEXT: ret <4 x i64> poison
;
%vec1 = insertelement <4 x i64> undef, i64 -1, i32 0
%vec2 = insertelement <4 x i64> %vec1, i64 -2, i32 1

4
test/Transforms/InstSimplify/ConstProp/cast.ll
View File

@ -5,7 +5,7 @@
define i8 @overflow_fptosi() {
; CHECK-LABEL: @overflow_fptosi(
; CHECK-NEXT: ret i8 undef
; CHECK-NEXT: ret i8 poison
;
%i = fptosi double 1.56e+02 to i8
ret i8 %i
@ -13,7 +13,7 @@ define i8 @overflow_fptosi() {
define i8 @overflow_fptoui() {
; CHECK-LABEL: @overflow_fptoui(
; CHECK-NEXT: ret i8 undef
; CHECK-NEXT: ret i8 poison
;
%i = fptoui double 2.56e+02 to i8
ret i8 %i

4
test/Transforms/InstSimplify/ConstProp/poison.ll
View File

@ -104,13 +104,13 @@ define void @vec_aggr_ops() {
define void @other_ops(i8 %x) {
; CHECK-LABEL: @other_ops(
; CHECK-NEXT: call void (...) @use(i1 poison, i1 poison, i8 poison, i8 poison, i8* poison)
; CHECK-NEXT: call void (...) @use(i1 poison, i1 poison, i8 poison, i8 poison, i8* poison, i8* poison)
; CHECK-NEXT: ret void
;
%i1 = icmp eq i8 poison, 1
%i2 = fcmp oeq float poison, 1.0
%i3 = select i1 poison, i8 1, i8 2
%i4 = select i1 true, i8 poison, i8 %x
call void (...) @use(i1 %i1, i1 %i2, i8 %i3, i8 %i4, i8* getelementptr (i8, i8* poison, i64 1))
call void (...) @use(i1 %i1, i1 %i2, i8 %i3, i8 %i4, i8* getelementptr (i8, i8* poison, i64 1), i8* getelementptr inbounds (i8, i8* undef, i64 1))
ret void
}

24
test/Transforms/InstSimplify/ConstProp/shift.ll
View File

@ -3,15 +3,15 @@
; CHECK-LABEL: shift_undef_64
define void @shift_undef_64(i64* %p) {
%r1 = lshr i64 -1, 4294967296 ; 2^32
; CHECK: store i64 undef
; CHECK: store i64 poison
store i64 %r1, i64* %p
%r2 = ashr i64 -1, 4294967297 ; 2^32 + 1
; CHECK: store i64 undef
; CHECK: store i64 poison
store i64 %r2, i64* %p
%r3 = shl i64 -1, 4294967298 ; 2^32 + 2
; CHECK: store i64 undef
; CHECK: store i64 poison
store i64 %r3, i64* %p
ret void
@ -20,15 +20,15 @@ define void @shift_undef_64(i64* %p) {
; CHECK-LABEL: shift_undef_65
define void @shift_undef_65(i65* %p) {
%r1 = lshr i65 2, 18446744073709551617
; CHECK: store i65 undef
; CHECK: store i65 poison
store i65 %r1, i65* %p
%r2 = ashr i65 4, 18446744073709551617
; CHECK: store i65 undef
; CHECK: store i65 poison
store i65 %r2, i65* %p
%r3 = shl i65 1, 18446744073709551617
; CHECK: store i65 undef
; CHECK: store i65 poison
store i65 %r3, i65* %p
ret void
@ -37,15 +37,15 @@ define void @shift_undef_65(i65* %p) {
; CHECK-LABEL: shift_undef_256
define void @shift_undef_256(i256* %p) {
%r1 = lshr i256 2, 18446744073709551617
; CHECK: store i256 undef
; CHECK: store i256 poison
store i256 %r1, i256* %p
%r2 = ashr i256 4, 18446744073709551618
; CHECK: store i256 undef
; CHECK: store i256 poison
store i256 %r2, i256* %p
%r3 = shl i256 1, 18446744073709551619
; CHECK: store i256 undef
; CHECK: store i256 poison
store i256 %r3, i256* %p
ret void
@ -54,15 +54,15 @@ define void @shift_undef_256(i256* %p) {
; CHECK-LABEL: shift_undef_511
define void @shift_undef_511(i511* %p) {
%r1 = lshr i511 -1, 1208925819614629174706276 ; 2^80 + 100
; CHECK: store i511 undef
; CHECK: store i511 poison
store i511 %r1, i511* %p
%r2 = ashr i511 -2, 1208925819614629174706200
; CHECK: store i511 undef
; CHECK: store i511 poison
store i511 %r2, i511* %p
%r3 = shl i511 -3, 1208925819614629174706180
; CHECK: store i511 undef
; CHECK: store i511 poison
store i511 %r3, i511* %p
ret void

2
test/Transforms/InstSimplify/ConstProp/vector-undef-elts.ll
View File

@ -5,7 +5,7 @@
define <3 x i8> @shl() {
; CHECK-LABEL: @shl(
; CHECK-NEXT: ret <3 x i8> <i8 undef, i8 0, i8 0>
; CHECK-NEXT: ret <3 x i8> <i8 poison, i8 0, i8 0>
;
%c = shl <3 x i8> undef, <i8 undef, i8 4, i8 1>
ret <3 x i8> %c

16
test/Transforms/InstSimplify/ConstProp/vscale.ll
View File

@ -75,7 +75,7 @@ define <vscale x 4 x float> @fmul() {
define <vscale x 4 x i32> @udiv() {
; CHECK-LABEL: @udiv(
; CHECK-NEXT: ret <vscale x 4 x i32> undef
; CHECK-NEXT: ret <vscale x 4 x i32> poison
;
%r = udiv <vscale x 4 x i32> undef, undef
ret <vscale x 4 x i32> %r
@ -83,7 +83,7 @@ define <vscale x 4 x i32> @udiv() {
define <vscale x 4 x i32> @udiv_splat_zero() {
; CHECK-LABEL: @udiv_splat_zero(
; CHECK-NEXT: ret <vscale x 4 x i32> undef
; CHECK-NEXT: ret <vscale x 4 x i32> poison
;
%r = udiv <vscale x 4 x i32> zeroinitializer, zeroinitializer
ret <vscale x 4 x i32> %r
@ -91,7 +91,7 @@ define <vscale x 4 x i32> @udiv_splat_zero() {
define <vscale x 4 x i32> @sdiv() {
; CHECK-LABEL: @sdiv(
; CHECK-NEXT: ret <vscale x 4 x i32> undef
; CHECK-NEXT: ret <vscale x 4 x i32> poison
;
%r = sdiv <vscale x 4 x i32> undef, undef
ret <vscale x 4 x i32> %r
@ -107,7 +107,7 @@ define <vscale x 4 x float> @fdiv() {
define <vscale x 4 x i32> @urem() {
; CHECK-LABEL: @urem(
; CHECK-NEXT: ret <vscale x 4 x i32> undef
; CHECK-NEXT: ret <vscale x 4 x i32> poison
;
%r = urem <vscale x 4 x i32> undef, undef
ret <vscale x 4 x i32> %r
@ -115,7 +115,7 @@ define <vscale x 4 x i32> @urem() {
define <vscale x 4 x i32> @srem() {
; CHECK-LABEL: @srem(
; CHECK-NEXT: ret <vscale x 4 x i32> undef
; CHECK-NEXT: ret <vscale x 4 x i32> poison
;
%r = srem <vscale x 4 x i32> undef, undef
ret <vscale x 4 x i32> %r
@ -135,7 +135,7 @@ define <vscale x 4 x float> @frem() {
define <vscale x 4 x i32> @shl() {
; CHECK-LABEL: @shl(
; CHECK-NEXT: ret <vscale x 4 x i32> undef
; CHECK-NEXT: ret <vscale x 4 x i32> poison
;
%r = shl <vscale x 4 x i32> undef, undef
ret <vscale x 4 x i32> %r
@ -143,7 +143,7 @@ define <vscale x 4 x i32> @shl() {
define <vscale x 4 x i32> @lshr() {
; CHECK-LABEL: @lshr(
; CHECK-NEXT: ret <vscale x 4 x i32> undef
; CHECK-NEXT: ret <vscale x 4 x i32> poison
;
%r = lshr <vscale x 4 x i32> undef, undef
ret <vscale x 4 x i32> %r
@ -151,7 +151,7 @@ define <vscale x 4 x i32> @lshr() {
define <vscale x 4 x i32> @ashr() {
; CHECK-LABEL: @ashr(
; CHECK-NEXT: ret <vscale x 4 x i32> undef
; CHECK-NEXT: ret <vscale x 4 x i32> poison
;
%r = ashr <vscale x 4 x i32> undef, undef
ret <vscale x 4 x i32> %r

14
test/Transforms/InstSimplify/div.ll
View File

@ -25,11 +25,11 @@ define <2 x i32> @zero_dividend_vector_undef_elt(<2 x i32> %A) {
ret <2 x i32> %B
}
; Division-by-zero is undef. UB in any vector lane means the whole op is undef.
; Division-by-zero is poison. UB in any vector lane means the whole op is poison.
define <2 x i8> @sdiv_zero_elt_vec_constfold(<2 x i8> %x) {
; CHECK-LABEL: @sdiv_zero_elt_vec_constfold(
; CHECK-NEXT: ret <2 x i8> undef
; CHECK-NEXT: ret <2 x i8> poison
;
%div = sdiv <2 x i8> <i8 1, i8 2>, <i8 0, i8 -42>
ret <2 x i8> %div
@ -37,12 +37,13 @@ define <2 x i8> @sdiv_zero_elt_vec_constfold(<2 x i8> %x) {
define <2 x i8> @udiv_zero_elt_vec_constfold(<2 x i8> %x) {
; CHECK-LABEL: @udiv_zero_elt_vec_constfold(
; CHECK-NEXT: ret <2 x i8> undef
; CHECK-NEXT: ret <2 x i8> poison
;
%div = udiv <2 x i8> <i8 1, i8 2>, <i8 42, i8 0>
ret <2 x i8> %div
}
; TODO: instsimplify should fold these to poison
define <2 x i8> @sdiv_zero_elt_vec(<2 x i8> %x) {
; CHECK-LABEL: @sdiv_zero_elt_vec(
; CHECK-NEXT: ret <2 x i8> undef
@ -193,4 +194,11 @@ define i32 @div1() {
ret i32 %urem
}
define i8 @sdiv_minusone_divisor() {
; CHECK-LABEL: @sdiv_minusone_divisor
; CHECK-NEXT: ret i8 poison
%v = sdiv i8 -128, -1
ret i8 %v
}
!0 = !{i32 0, i32 3}

13
test/Transforms/InstSimplify/rem.ll
View File

@ -25,11 +25,11 @@ define <2 x i32> @zero_dividend_vector_undef_elt(<2 x i32> %A) {
ret <2 x i32> %B
}
; Division-by-zero is undef. UB in any vector lane means the whole op is undef.
; Division-by-zero is poison. UB in any vector lane means the whole op is poison.
define <2 x i8> @srem_zero_elt_vec_constfold(<2 x i8> %x) {
; CHECK-LABEL: @srem_zero_elt_vec_constfold(
; CHECK-NEXT: ret <2 x i8> undef
; CHECK-NEXT: ret <2 x i8> poison
;
%rem = srem <2 x i8> <i8 1, i8 2>, <i8 0, i8 -42>
ret <2 x i8> %rem
@ -37,12 +37,13 @@ define <2 x i8> @srem_zero_elt_vec_constfold(<2 x i8> %x) {
define <2 x i8> @urem_zero_elt_vec_constfold(<2 x i8> %x) {
; CHECK-LABEL: @urem_zero_elt_vec_constfold(
; CHECK-NEXT: ret <2 x i8> undef
; CHECK-NEXT: ret <2 x i8> poison
;
%rem = urem <2 x i8> <i8 1, i8 2>, <i8 42, i8 0>
ret <2 x i8> %rem
}
; TODO: instsimplify should fold these to poison
define <2 x i8> @srem_zero_elt_vec(<2 x i8> %x) {
; CHECK-LABEL: @srem_zero_elt_vec(
; CHECK-NEXT: ret <2 x i8> undef
@ -325,3 +326,9 @@ define <2 x i32> @srem_with_sext_bool_divisor_vec(<2 x i1> %x, <2 x i32> %y) {
ret <2 x i32> %r
}
define i8 @srem_minusone_divisor() {
; CHECK-LABEL: @srem_minusone_divisor
; CHECK-NEXT: ret i8 poison
%v = srem i8 -128, -1
ret i8 %v
}

18
test/Transforms/InstSimplify/undef.ll
View File

@ -90,7 +90,7 @@ define i64 @test10() {
define i64 @test11() {
; CHECK-LABEL: @test11(
; CHECK: ret i64 undef
; CHECK: ret i64 poison
;
%r = shl i64 undef, undef
ret i64 %r
@ -106,7 +106,7 @@ define i64 @test11b(i64 %a) {
define i64 @test12() {
; CHECK-LABEL: @test12(
; CHECK: ret i64 undef
; CHECK: ret i64 poison
;
%r = ashr i64 undef, undef
ret i64 %r
@ -122,7 +122,7 @@ define i64 @test12b(i64 %a) {
define i64 @test13() {
; CHECK-LABEL: @test13(
; CHECK: ret i64 undef
; CHECK: ret i64 poison
;
%r = lshr i64 undef, undef
ret i64 %r
@ -235,7 +235,7 @@ define i32 @test23(i32 %a) {
define i32 @test24() {
; CHECK-LABEL: @test24(
; CHECK: ret i32 undef
; CHECK: ret i32 poison
;
%b = udiv i32 undef, 0
ret i32 %b
@ -243,7 +243,7 @@ define i32 @test24() {
define i32 @test25() {
; CHECK-LABEL: @test25(
; CHECK: ret i32 undef
; CHECK: ret i32 poison
;
%b = lshr i32 0, undef
ret i32 %b
@ -251,7 +251,7 @@ define i32 @test25() {
define i32 @test26() {
; CHECK-LABEL: @test26(
; CHECK: ret i32 undef
; CHECK: ret i32 poison
;
%b = ashr i32 0, undef
ret i32 %b
@ -259,7 +259,7 @@ define i32 @test26() {
define i32 @test27() {
; CHECK-LABEL: @test27(
; CHECK: ret i32 undef
; CHECK: ret i32 poison
;
%b = shl i32 0, undef
ret i32 %b
@ -339,7 +339,7 @@ define i32 @test36(i32 %V) {
define i32 @test37() {
; CHECK-LABEL: @test37(
; CHECK: ret i32 undef
; CHECK: ret i32 poison
;
%b = udiv i32 undef, undef
ret i32 %b
@ -355,7 +355,7 @@ define i32 @test38(i32 %a) {
define i32 @test39() {
; CHECK-LABEL: @test39(
; CHECK: ret i32 undef
; CHECK: ret i32 poison
;
%b = udiv i32 0, undef
ret i32 %b

2
test/Transforms/SROA/phi-gep.ll
View File

@ -348,7 +348,7 @@ define void @test_sroa_gep_phi_select_same_block() {
; CHECK-NEXT: [[PHI:%.*]] = phi %pair* [ [[ALLOCA]], [[ENTRY:%.*]] ], [ [[SELECT:%.*]], [[WHILE_BODY]] ]
; CHECK-NEXT: [[SELECT]] = select i1 undef, %pair* [[PHI]], %pair* undef
; CHECK-NEXT: [[PHI_SROA_GEP:%.*]] = getelementptr inbounds [[PAIR]], %pair* [[PHI]], i64 1
; CHECK-NEXT: [[SELECT_SROA_SEL:%.*]] = select i1 undef, %pair* [[PHI_SROA_GEP]], %pair* undef
; CHECK-NEXT: [[SELECT_SROA_SEL:%.*]] = select i1 undef, %pair* [[PHI_SROA_GEP]], %pair* poison
; CHECK-NEXT: br i1 undef, label [[EXIT:%.*]], label [[WHILE_BODY]]
; CHECK: exit:
; CHECK-NEXT: unreachable

2
test/Transforms/SROA/select-gep.ll
View File

@ -83,7 +83,7 @@ define i32 @test_sroa_select_gep_undef(i1 %cond) {
; CHECK-LABEL: @test_sroa_select_gep_undef(
; CHECK-NEXT: bb:
; CHECK-NEXT: [[A_SROA_0:%.*]] = alloca i32, align 4
; CHECK-NEXT: [[SELECT_SROA_SEL:%.*]] = select i1 [[COND:%.*]], i32* [[A_SROA_0]], i32* undef
; CHECK-NEXT: [[SELECT_SROA_SEL:%.*]] = select i1 [[COND:%.*]], i32* [[A_SROA_0]], i32* poison
; CHECK-NEXT: [[LOAD:%.*]] = load i32, i32* [[SELECT_SROA_SEL]], align 4
; CHECK-NEXT: ret i32 [[LOAD]]
;

14
test/Transforms/VectorCombine/X86/insert-binop-with-constant.ll
View File

@ -189,7 +189,7 @@ define <4 x i32> @shl_constant_op0_multiuse(i32 %a0, <4 x i32> %a1) {
define <2 x i64> @shl_constant_op1(i64 %x) {
; CHECK-LABEL: @shl_constant_op1(
; CHECK-NEXT: [[BO_SCALAR:%.*]] = shl nuw i64 [[X:%.*]], 5
; CHECK-NEXT: [[BO:%.*]] = insertelement <2 x i64> <i64 0, i64 undef>, i64 [[BO_SCALAR]], i64 0
; CHECK-NEXT: [[BO:%.*]] = insertelement <2 x i64> <i64 0, i64 poison>, i64 [[BO_SCALAR]], i64 0
; CHECK-NEXT: ret <2 x i64> [[BO]]
;
%ins = insertelement <2 x i64> undef, i64 %x, i32 0
@ -246,7 +246,7 @@ define <2 x i64> @ashr_constant_op0_not_undef_lane(i64 %x) {
define <2 x i64> @ashr_constant_op1(i64 %x) {
; CHECK-LABEL: @ashr_constant_op1(
; CHECK-NEXT: [[BO_SCALAR:%.*]] = ashr i64 [[X:%.*]], 5
; CHECK-NEXT: [[BO:%.*]] = insertelement <2 x i64> <i64 0, i64 undef>, i64 [[BO_SCALAR]], i64 0
; CHECK-NEXT: [[BO:%.*]] = insertelement <2 x i64> <i64 0, i64 poison>, i64 [[BO_SCALAR]], i64 0
; CHECK-NEXT: ret <2 x i64> [[BO]]
;
%ins = insertelement <2 x i64> undef, i64 %x, i32 0
@ -290,7 +290,7 @@ define <2 x i64> @lshr_constant_op0_not_undef_lane(i64 %x) {
define <2 x i64> @lshr_constant_op1(i64 %x) {
; CHECK-LABEL: @lshr_constant_op1(
; CHECK-NEXT: [[BO_SCALAR:%.*]] = lshr exact i64 [[X:%.*]], 2
; CHECK-NEXT: [[BO:%.*]] = insertelement <2 x i64> <i64 undef, i64 0>, i64 [[BO_SCALAR]], i64 1
; CHECK-NEXT: [[BO:%.*]] = insertelement <2 x i64> <i64 poison, i64 0>, i64 [[BO_SCALAR]], i64 1
; CHECK-NEXT: ret <2 x i64> [[BO]]
;
%ins = insertelement <2 x i64> undef, i64 %x, i32 1
@ -334,7 +334,7 @@ define <2 x i64> @urem_constant_op0_not_undef_lane(i64 %x) {
define <2 x i64> @urem_constant_op1(i64 %x) {
; CHECK-LABEL: @urem_constant_op1(
; CHECK-NEXT: [[BO_SCALAR:%.*]] = urem i64 [[X:%.*]], 2
; CHECK-NEXT: [[BO:%.*]] = insertelement <2 x i64> <i64 undef, i64 0>, i64 [[BO_SCALAR]], i64 1
; CHECK-NEXT: [[BO:%.*]] = insertelement <2 x i64> <i64 poison, i64 0>, i64 [[BO_SCALAR]], i64 1
; CHECK-NEXT: ret <2 x i64> [[BO]]
;
%ins = insertelement <2 x i64> undef, i64 %x, i32 1
@ -378,7 +378,7 @@ define <2 x i64> @srem_constant_op0_not_undef_lane(i64 %x) {
define <2 x i64> @srem_constant_op1(i64 %x) {
; CHECK-LABEL: @srem_constant_op1(
; CHECK-NEXT: [[BO_SCALAR:%.*]] = srem i64 [[X:%.*]], 2
; CHECK-NEXT: [[BO:%.*]] = insertelement <2 x i64> <i64 undef, i64 0>, i64 [[BO_SCALAR]], i64 1
; CHECK-NEXT: [[BO:%.*]] = insertelement <2 x i64> <i64 poison, i64 0>, i64 [[BO_SCALAR]], i64 1
; CHECK-NEXT: ret <2 x i64> [[BO]]
;
%ins = insertelement <2 x i64> undef, i64 %x, i32 1
@ -422,7 +422,7 @@ define <2 x i64> @udiv_constant_op0_not_undef_lane(i64 %x) {
define <2 x i64> @udiv_constant_op1(i64 %x) {
; CHECK-LABEL: @udiv_constant_op1(
; CHECK-NEXT: [[BO_SCALAR:%.*]] = udiv i64 [[X:%.*]], 2
; CHECK-NEXT: [[BO:%.*]] = insertelement <2 x i64> <i64 undef, i64 0>, i64 [[BO_SCALAR]], i64 1
; CHECK-NEXT: [[BO:%.*]] = insertelement <2 x i64> <i64 poison, i64 0>, i64 [[BO_SCALAR]], i64 1
; CHECK-NEXT: ret <2 x i64> [[BO]]
;
%ins = insertelement <2 x i64> undef, i64 %x, i32 1
@ -466,7 +466,7 @@ define <2 x i64> @sdiv_constant_op0_not_undef_lane(i64 %x) {
define <2 x i64> @sdiv_constant_op1(i64 %x) {
; CHECK-LABEL: @sdiv_constant_op1(
; CHECK-NEXT: [[BO_SCALAR:%.*]] = sdiv exact i64 [[X:%.*]], 2
; CHECK-NEXT: [[BO:%.*]] = insertelement <2 x i64> <i64 undef, i64 0>, i64 [[BO_SCALAR]], i64 1
; CHECK-NEXT: [[BO:%.*]] = insertelement <2 x i64> <i64 poison, i64 0>, i64 [[BO_SCALAR]], i64 1
; CHECK-NEXT: ret <2 x i64> [[BO]]
;
%ins = insertelement <2 x i64> undef, i64 %x, i32 1

4
test/Transforms/VectorCombine/X86/insert-binop.ll
View File

@ -128,7 +128,7 @@ define <2 x i64> @ins1_ins1_sdiv(i64 %x, i64 %y) {
define <2 x i64> @ins1_ins1_udiv(i64 %x, i64 %y) {
; CHECK-LABEL: @ins1_ins1_udiv(
; CHECK-NEXT: [[R_SCALAR:%.*]] = udiv i64 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = insertelement <2 x i64> <i64 6, i64 undef>, i64 [[R_SCALAR]], i64 1
; CHECK-NEXT: [[R:%.*]] = insertelement <2 x i64> <i64 6, i64 poison>, i64 [[R_SCALAR]], i64 1
; CHECK-NEXT: ret <2 x i64> [[R]]
;
%i0 = insertelement <2 x i64> <i64 42, i64 undef>, i64 %x, i32 1
@ -143,7 +143,7 @@ define <2 x i64> @ins1_ins1_udiv(i64 %x, i64 %y) {
define <2 x i64> @ins1_ins1_urem(i64 %x, i64 %y) {
; CHECK-LABEL: @ins1_ins1_urem(
; CHECK-NEXT: [[R_SCALAR:%.*]] = urem i64 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = insertelement <2 x i64> <i64 undef, i64 0>, i64 [[R_SCALAR]], i64 1
; CHECK-NEXT: [[R:%.*]] = insertelement <2 x i64> <i64 poison, i64 0>, i64 [[R_SCALAR]], i64 1
; CHECK-NEXT: ret <2 x i64> [[R]]
;
%i0 = insertelement <2 x i64> <i64 42, i64 undef>, i64 %x, i64 1

25
unittests/IR/ConstantsTest.cpp
View File

@ -27,7 +27,7 @@ TEST(ConstantsTest, Integer_i1) {
Constant* Zero = ConstantInt::get(Int1, 0);
Constant* NegOne = ConstantInt::get(Int1, static_cast<uint64_t>(-1), true);
EXPECT_EQ(NegOne, ConstantInt::getSigned(Int1, -1));
Constant* Undef = UndefValue::get(Int1);
Constant* Poison = PoisonValue::get(Int1);
// Input: @b = constant i1 add(i1 1 , i1 1)
// Output: @b = constant i1 false
@ -53,21 +53,21 @@ TEST(ConstantsTest, Integer_i1) {
// @g = constant i1 false
EXPECT_EQ(Zero, ConstantExpr::getSub(One, One));
// @h = constant i1 shl(i1 1 , i1 1) ; undefined
// @h = constant i1 undef
EXPECT_EQ(Undef, ConstantExpr::getShl(One, One));
// @h = constant i1 shl(i1 1 , i1 1) ; poison
// @h = constant i1 poison
EXPECT_EQ(Poison, ConstantExpr::getShl(One, One));
// @i = constant i1 shl(i1 1 , i1 0)
// @i = constant i1 true
EXPECT_EQ(One, ConstantExpr::getShl(One, Zero));
// @j = constant i1 lshr(i1 1, i1 1) ; undefined
// @j = constant i1 undef
EXPECT_EQ(Undef, ConstantExpr::getLShr(One, One));
// @j = constant i1 lshr(i1 1, i1 1) ; poison
// @j = constant i1 poison
EXPECT_EQ(Poison, ConstantExpr::getLShr(One, One));
// @m = constant i1 ashr(i1 1, i1 1) ; undefined
// @m = constant i1 undef
EXPECT_EQ(Undef, ConstantExpr::getAShr(One, One));
// @m = constant i1 ashr(i1 1, i1 1) ; poison
// @m = constant i1 poison
EXPECT_EQ(Poison, ConstantExpr::getAShr(One, One));
// @n = constant i1 mul(i1 -1, i1 1)
// @n = constant i1 true
@ -218,7 +218,6 @@ TEST(ConstantsTest, AsInstructionsTest) {
Constant *Elt = ConstantInt::get(Int16Ty, 2015);
Constant *Poison16 = PoisonValue::get(Int16Ty);
Constant *Undef64 = UndefValue::get(Int64Ty);
Constant *UndefV16 = UndefValue::get(P6->getType());
Constant *PoisonV16 = PoisonValue::get(P6->getType());
#define P0STR "ptrtoint (i32** @dummy to i32)"
@ -295,8 +294,8 @@ TEST(ConstantsTest, AsInstructionsTest) {
EXPECT_EQ(Elt, ConstantExpr::getExtractElement(
ConstantExpr::getInsertElement(P6, Elt, One), One));
EXPECT_EQ(UndefV16, ConstantExpr::getInsertElement(P6, Elt, Two));
EXPECT_EQ(UndefV16, ConstantExpr::getInsertElement(P6, Elt, Big));
EXPECT_EQ(PoisonV16, ConstantExpr::getInsertElement(P6, Elt, Two));
EXPECT_EQ(PoisonV16, ConstantExpr::getInsertElement(P6, Elt, Big));
EXPECT_EQ(PoisonV16, ConstantExpr::getInsertElement(P6, Elt, Undef64));
}