sepavloff created this revision.
sepavloff added reviewers: rjmccall, andrew.w.kaylor, arsenm, kpn,
cameron.mcinally, uweigand.
Herald added subscribers: dexonsmith, hiraditya, wdng.
Herald added a project: clang.
Now compiler defines 5 sets of constants to represent rounding mode.
These are:
1. `llvm::APFloatBase::roundingMode`. It specifies all 5 rounding modes
defined by IEEE-754 and is used in `APFloat` implementation.
2. `clang::LangOptions::FPRoundingModeKind`. It specifies 4 of 5 IEEE-754
rounding modes and a special value for dynamic rounding mode. It is used
in clang frontend.
3. `llvm::fp::RoundingMode`. Defines the same values as
`clang::LangOptions::FPRoundingModeKind` but in different order. It is
used to specify rounding mode in IR and functions that operate IR.
4. Rounding mode representation used by `FLT_ROUNDS` (C11, 5.2.4.2.2p7).
Besides constants for rounding mode it also defines a special value to
indicate errors. It is convenient to use in intrinsic functions, as it
is a platform-independent representation for rounding mode. In this
role it is used in some pending patches.
5. Values like `FE_DOWNWARD` and other, which specify rounding mode in
library calls `fesetround` and `fegetround`. Often they represent bits
of some control register, so they are target-dependent. The same names
(not values) and a special name `FE_DYNAMIC` are used in
`#pragma STDC FENV_ROUND`.
The first 4 sets of constants are target independent and could have the
same numerical representation. It would simplify conversion between the
representations. Also now `clang::LangOptions::FPRoundingModeKind` and
`llvm::fp::RoundingMode` do not contain the value for IEEE-754 rounding
direction `roundTiesToAway`, although it is supported natively on
some targets.
This change defines all the rounding mode types via one enumeration
`llvm::RoundingMode`, which also contains rounding mode for IEEE
rounding direction `roundTiesToAway`. This enumeration uses the encoding
specified by C standard for `FLT_ROUNDS`, as it is the only representation
in which numerical values of rounding modes is fixed.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D77379
Files:
clang/include/clang/Basic/LangOptions.def
clang/include/clang/Basic/LangOptions.h
clang/include/clang/Sema/Sema.h
clang/lib/Basic/LangOptions.cpp
clang/lib/CodeGen/CodeGenFunction.cpp
clang/lib/Frontend/CompilerInvocation.cpp
clang/lib/Sema/SemaAttr.cpp
clang/lib/Sema/SemaExpr.cpp
clang/lib/Serialization/ASTReader.cpp
llvm/include/llvm/ADT/APFloat.h
llvm/include/llvm/ADT/FloatingPointMode.h
llvm/include/llvm/IR/FPEnv.h
llvm/include/llvm/IR/IRBuilder.h
llvm/include/llvm/IR/IntrinsicInst.h
llvm/lib/Analysis/ConstantFolding.cpp
llvm/lib/IR/FPEnv.cpp
llvm/lib/IR/IntrinsicInst.cpp
llvm/lib/Support/APFloat.cpp
llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
llvm/unittests/IR/IRBuilderTest.cpp
Index: llvm/unittests/IR/IRBuilderTest.cpp
===================================================================
--- llvm/unittests/IR/IRBuilderTest.cpp
+++ llvm/unittests/IR/IRBuilderTest.cpp
@@ -257,51 +257,51 @@
ASSERT_TRUE(isa<ConstrainedFPIntrinsic>(V));
auto *CII = cast<ConstrainedFPIntrinsic>(V);
EXPECT_EQ(fp::ebStrict, CII->getExceptionBehavior());
- EXPECT_EQ(fp::rmDynamic, CII->getRoundingMode());
+ EXPECT_EQ(RoundingMode::Dynamic, CII->getRoundingMode());
Builder.setDefaultConstrainedExcept(fp::ebIgnore);
- Builder.setDefaultConstrainedRounding(fp::rmUpward);
+ Builder.setDefaultConstrainedRounding(RoundingMode::TowardPositive);
V = Builder.CreateFAdd(V, V);
CII = cast<ConstrainedFPIntrinsic>(V);
EXPECT_EQ(fp::ebIgnore, CII->getExceptionBehavior());
- EXPECT_EQ(CII->getRoundingMode(), fp::rmUpward);
+ EXPECT_EQ(CII->getRoundingMode(), RoundingMode::TowardPositive);
Builder.setDefaultConstrainedExcept(fp::ebIgnore);
- Builder.setDefaultConstrainedRounding(fp::rmToNearest);
+ Builder.setDefaultConstrainedRounding(RoundingMode::NearestTiesToEven);
V = Builder.CreateFAdd(V, V);
CII = cast<ConstrainedFPIntrinsic>(V);
EXPECT_EQ(fp::ebIgnore, CII->getExceptionBehavior());
- EXPECT_EQ(fp::rmToNearest, CII->getRoundingMode());
+ EXPECT_EQ(RoundingMode::NearestTiesToEven, CII->getRoundingMode());
Builder.setDefaultConstrainedExcept(fp::ebMayTrap);
- Builder.setDefaultConstrainedRounding(fp::rmDownward);
+ Builder.setDefaultConstrainedRounding(RoundingMode::TowardNegative);
V = Builder.CreateFAdd(V, V);
CII = cast<ConstrainedFPIntrinsic>(V);
EXPECT_EQ(fp::ebMayTrap, CII->getExceptionBehavior());
- EXPECT_EQ(fp::rmDownward, CII->getRoundingMode());
+ EXPECT_EQ(RoundingMode::TowardNegative, CII->getRoundingMode());
Builder.setDefaultConstrainedExcept(fp::ebStrict);
- Builder.setDefaultConstrainedRounding(fp::rmTowardZero);
+ Builder.setDefaultConstrainedRounding(RoundingMode::TowardZero);
V = Builder.CreateFAdd(V, V);
CII = cast<ConstrainedFPIntrinsic>(V);
EXPECT_EQ(fp::ebStrict, CII->getExceptionBehavior());
- EXPECT_EQ(fp::rmTowardZero, CII->getRoundingMode());
+ EXPECT_EQ(RoundingMode::TowardZero, CII->getRoundingMode());
Builder.setDefaultConstrainedExcept(fp::ebIgnore);
- Builder.setDefaultConstrainedRounding(fp::rmDynamic);
+ Builder.setDefaultConstrainedRounding(RoundingMode::Dynamic);
V = Builder.CreateFAdd(V, V);
CII = cast<ConstrainedFPIntrinsic>(V);
EXPECT_EQ(fp::ebIgnore, CII->getExceptionBehavior());
- EXPECT_EQ(fp::rmDynamic, CII->getRoundingMode());
+ EXPECT_EQ(RoundingMode::Dynamic, CII->getRoundingMode());
// Now override the defaults.
Call = Builder.CreateConstrainedFPBinOp(
Intrinsic::experimental_constrained_fadd, V, V, nullptr, "", nullptr,
- fp::rmDownward, fp::ebMayTrap);
+ RoundingMode::TowardNegative, fp::ebMayTrap);
CII = cast<ConstrainedFPIntrinsic>(Call);
EXPECT_EQ(CII->getIntrinsicID(), Intrinsic::experimental_constrained_fadd);
EXPECT_EQ(fp::ebMayTrap, CII->getExceptionBehavior());
- EXPECT_EQ(fp::rmDownward, CII->getRoundingMode());
+ EXPECT_EQ(RoundingMode::TowardNegative, CII->getRoundingMode());
Builder.CreateRetVoid();
EXPECT_FALSE(verifyModule(*M));
Index: llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
===================================================================
--- llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
+++ llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
@@ -270,7 +270,7 @@
}
void FAddendCoef::operator+=(const FAddendCoef &That) {
- enum APFloat::roundingMode RndMode = APFloat::rmNearestTiesToEven;
+ RoundingMode RndMode = RoundingMode::NearestTiesToEven;
if (isInt() == That.isInt()) {
if (isInt())
IntVal += That.IntVal;
Index: llvm/lib/Support/APFloat.cpp
===================================================================
--- llvm/lib/Support/APFloat.cpp
+++ llvm/lib/Support/APFloat.cpp
@@ -171,6 +171,12 @@
return semPPCDoubleDouble;
}
+ constexpr RoundingMode APFloatBase::rmNearestTiesToEven;
+ constexpr RoundingMode APFloatBase::rmTowardPositive;
+ constexpr RoundingMode APFloatBase::rmTowardNegative;
+ constexpr RoundingMode APFloatBase::rmTowardZero;
+ constexpr RoundingMode APFloatBase::rmNearestTiesToAway;
+
/* A tight upper bound on number of parts required to hold the value
pow(5, power) is
@@ -1323,6 +1329,9 @@
case rmTowardNegative:
return sign;
+
+ default:
+ break;
}
llvm_unreachable("Invalid rounding mode found");
}
Index: llvm/lib/IR/IntrinsicInst.cpp
===================================================================
--- llvm/lib/IR/IntrinsicInst.cpp
+++ llvm/lib/IR/IntrinsicInst.cpp
@@ -104,7 +104,7 @@
return ConstantInt::get(Type::getInt64Ty(Context), 1);
}
-Optional<fp::RoundingMode> ConstrainedFPIntrinsic::getRoundingMode() const {
+Optional<RoundingMode> ConstrainedFPIntrinsic::getRoundingMode() const {
unsigned NumOperands = getNumArgOperands();
Metadata *MD =
cast<MetadataAsValue>(getArgOperand(NumOperands - 2))->getMetadata();
Index: llvm/lib/IR/FPEnv.cpp
===================================================================
--- llvm/lib/IR/FPEnv.cpp
+++ llvm/lib/IR/FPEnv.cpp
@@ -17,36 +17,42 @@
namespace llvm {
-Optional<fp::RoundingMode> StrToRoundingMode(StringRef RoundingArg) {
+Optional<RoundingMode> StrToRoundingMode(StringRef RoundingArg) {
// For dynamic rounding mode, we use round to nearest but we will set the
// 'exact' SDNodeFlag so that the value will not be rounded.
- return StringSwitch<Optional<fp::RoundingMode>>(RoundingArg)
- .Case("round.dynamic", fp::rmDynamic)
- .Case("round.tonearest", fp::rmToNearest)
- .Case("round.downward", fp::rmDownward)
- .Case("round.upward", fp::rmUpward)
- .Case("round.towardzero", fp::rmTowardZero)
+ return StringSwitch<Optional<RoundingMode>>(RoundingArg)
+ .Case("round.dynamic", RoundingMode::Dynamic)
+ .Case("round.tonearest", RoundingMode::NearestTiesToEven)
+ .Case("round.tonearestaway", RoundingMode::NearestTiesToAway)
+ .Case("round.downward", RoundingMode::TowardNegative)
+ .Case("round.upward", RoundingMode::TowardPositive)
+ .Case("round.towardzero", RoundingMode::TowardZero)
.Default(None);
}
-Optional<StringRef> RoundingModeToStr(fp::RoundingMode UseRounding) {
+Optional<StringRef> RoundingModeToStr(RoundingMode UseRounding) {
Optional<StringRef> RoundingStr = None;
switch (UseRounding) {
- case fp::rmDynamic:
+ case RoundingMode::Dynamic:
RoundingStr = "round.dynamic";
break;
- case fp::rmToNearest:
+ case RoundingMode::NearestTiesToEven:
RoundingStr = "round.tonearest";
break;
- case fp::rmDownward:
+ case RoundingMode::NearestTiesToAway:
+ RoundingStr = "round.tonearestaway";
+ break;
+ case RoundingMode::TowardNegative:
RoundingStr = "round.downward";
break;
- case fp::rmUpward:
+ case RoundingMode::TowardPositive:
RoundingStr = "round.upward";
break;
- case fp::rmTowardZero:
+ case RoundingMode::TowardZero:
RoundingStr = "round.towardzero";
break;
+ default:
+ break;
}
return RoundingStr;
}
@@ -74,21 +80,4 @@
}
return ExceptStr;
}
-
-Optional<APFloatBase::roundingMode>
-getAPFloatRoundingMode(fp::RoundingMode RM) {
- switch (RM) {
- case fp::rmDynamic:
- return None;
- case fp::rmToNearest:
- return APFloat::rmNearestTiesToEven;
- case fp::rmDownward:
- return APFloat::rmTowardNegative;
- case fp::rmUpward:
- return APFloat::rmTowardPositive;
- case fp::rmTowardZero:
- return APFloat::rmTowardZero;
- }
- llvm_unreachable("Unexpected rounding mode");
-}
}
Index: llvm/lib/Analysis/ConstantFolding.cpp
===================================================================
--- llvm/lib/Analysis/ConstantFolding.cpp
+++ llvm/lib/Analysis/ConstantFolding.cpp
@@ -1825,10 +1825,8 @@
case Intrinsic::experimental_constrained_nearbyint:
case Intrinsic::experimental_constrained_rint: {
auto CI = cast<ConstrainedFPIntrinsic>(Call);
- Optional<fp::RoundingMode> RMOp = CI->getRoundingMode();
- if (RMOp)
- RM = getAPFloatRoundingMode(*RMOp);
- if (!RM)
+ RM = CI->getRoundingMode();
+ if (!RM || RM.getValue() == RoundingMode::Dynamic)
return nullptr;
break;
}
Index: llvm/include/llvm/IR/IntrinsicInst.h
===================================================================
--- llvm/include/llvm/IR/IntrinsicInst.h
+++ llvm/include/llvm/IR/IntrinsicInst.h
@@ -253,7 +253,7 @@
public:
bool isUnaryOp() const;
bool isTernaryOp() const;
- Optional<fp::RoundingMode> getRoundingMode() const;
+ Optional<RoundingMode> getRoundingMode() const;
Optional<fp::ExceptionBehavior> getExceptionBehavior() const;
// Methods for support type inquiry through isa, cast, and dyn_cast:
Index: llvm/include/llvm/IR/IRBuilder.h
===================================================================
--- llvm/include/llvm/IR/IRBuilder.h
+++ llvm/include/llvm/IR/IRBuilder.h
@@ -105,7 +105,7 @@
bool IsFPConstrained;
fp::ExceptionBehavior DefaultConstrainedExcept;
- fp::RoundingMode DefaultConstrainedRounding;
+ RoundingMode DefaultConstrainedRounding;
ArrayRef<OperandBundleDef> DefaultOperandBundles;
@@ -116,7 +116,7 @@
: Context(context), Folder(Folder), Inserter(Inserter),
DefaultFPMathTag(FPMathTag), IsFPConstrained(false),
DefaultConstrainedExcept(fp::ebStrict),
- DefaultConstrainedRounding(fp::rmDynamic),
+ DefaultConstrainedRounding(RoundingMode::Dynamic),
DefaultOperandBundles(OpBundles) {
ClearInsertionPoint();
}
@@ -268,7 +268,7 @@
}
/// Set the rounding mode handling to be used with constrained floating point
- void setDefaultConstrainedRounding(fp::RoundingMode NewRounding) {
+ void setDefaultConstrainedRounding(RoundingMode NewRounding) {
DefaultConstrainedRounding = NewRounding;
}
@@ -278,7 +278,7 @@
}
/// Get the rounding mode handling used with constrained floating point
- fp::RoundingMode getDefaultConstrainedRounding() {
+ RoundingMode getDefaultConstrainedRounding() {
return DefaultConstrainedRounding;
}
@@ -1217,8 +1217,8 @@
return (LC && RC) ? Insert(Folder.CreateBinOp(Opc, LC, RC), Name) : nullptr;
}
- Value *getConstrainedFPRounding(Optional<fp::RoundingMode> Rounding) {
- fp::RoundingMode UseRounding = DefaultConstrainedRounding;
+ Value *getConstrainedFPRounding(Optional<RoundingMode> Rounding) {
+ RoundingMode UseRounding = DefaultConstrainedRounding;
if (Rounding.hasValue())
UseRounding = Rounding.getValue();
@@ -1609,7 +1609,7 @@
CallInst *CreateConstrainedFPBinOp(
Intrinsic::ID ID, Value *L, Value *R, Instruction *FMFSource = nullptr,
const Twine &Name = "", MDNode *FPMathTag = nullptr,
- Optional<fp::RoundingMode> Rounding = None,
+ Optional<RoundingMode> Rounding = None,
Optional<fp::ExceptionBehavior> Except = None) {
Value *RoundingV = getConstrainedFPRounding(Rounding);
Value *ExceptV = getConstrainedFPExcept(Except);
@@ -2267,7 +2267,7 @@
Intrinsic::ID ID, Value *V, Type *DestTy,
Instruction *FMFSource = nullptr, const Twine &Name = "",
MDNode *FPMathTag = nullptr,
- Optional<fp::RoundingMode> Rounding = None,
+ Optional<RoundingMode> Rounding = None,
Optional<fp::ExceptionBehavior> Except = None) {
Value *ExceptV = getConstrainedFPExcept(Except);
@@ -2541,7 +2541,7 @@
CallInst *CreateConstrainedFPCall(
Function *Callee, ArrayRef<Value *> Args, const Twine &Name = "",
- Optional<fp::RoundingMode> Rounding = None,
+ Optional<RoundingMode> Rounding = None,
Optional<fp::ExceptionBehavior> Except = None) {
llvm::SmallVector<Value *, 6> UseArgs;
Index: llvm/include/llvm/IR/FPEnv.h
===================================================================
--- llvm/include/llvm/IR/FPEnv.h
+++ llvm/include/llvm/IR/FPEnv.h
@@ -24,19 +24,6 @@
namespace fp {
-/// Rounding mode used for floating point operations.
-///
-/// Each of these values correspond to some metadata argument value of a
-/// constrained floating point intrinsic. See the LLVM Language Reference Manual
-/// for details.
-enum RoundingMode : uint8_t {
- rmDynamic, ///< This corresponds to "fpround.dynamic".
- rmToNearest, ///< This corresponds to "fpround.tonearest".
- rmDownward, ///< This corresponds to "fpround.downward".
- rmUpward, ///< This corresponds to "fpround.upward".
- rmTowardZero ///< This corresponds to "fpround.tozero".
-};
-
/// Exception behavior used for floating point operations.
///
/// Each of these values correspond to some metadata argument value of a
@@ -53,11 +40,11 @@
/// Returns a valid RoundingMode enumerator when given a string
/// that is valid as input in constrained intrinsic rounding mode
/// metadata.
-Optional<fp::RoundingMode> StrToRoundingMode(StringRef);
+Optional<RoundingMode> StrToRoundingMode(StringRef);
/// For any RoundingMode enumerator, returns a string valid as input in
/// constrained intrinsic rounding mode metadata.
-Optional<StringRef> RoundingModeToStr(fp::RoundingMode);
+Optional<StringRef> RoundingModeToStr(RoundingMode);
/// Returns a valid ExceptionBehavior enumerator when given a string
/// valid as input in constrained intrinsic exception behavior metadata.
@@ -66,9 +53,5 @@
/// For any ExceptionBehavior enumerator, returns a string valid as
/// input in constrained intrinsic exception behavior metadata.
Optional<StringRef> ExceptionBehaviorToStr(fp::ExceptionBehavior);
-
-/// Converts rounding mode represented by fp::RoundingMode to the rounding mode
-/// index used by APFloat. For fp::rmDynamic it returns None.
-Optional<APFloatBase::roundingMode> getAPFloatRoundingMode(fp::RoundingMode);
}
#endif
Index: llvm/include/llvm/ADT/FloatingPointMode.h
===================================================================
--- llvm/include/llvm/ADT/FloatingPointMode.h
+++ llvm/include/llvm/ADT/FloatingPointMode.h
@@ -18,6 +18,25 @@
namespace llvm {
+/// Rounding mode.
+///
+/// Enumerates supported rounding modes, as well as some special values. The set
+// of the modes must agree with IEEE-754, 4.3.1 and 4.3.2. The constants
+/// assigned to the rounding modes must agree with the values used by FLT_ROUNDS
+/// (C11, 5.2.4.2.2p8).
+enum class RoundingMode : int8_t {
+ // Rounding mode defined in IEEE-754.
+ TowardZero = 0, ///< roundTowardZero.
+ NearestTiesToEven = 1, ///< roundTiesToEven.
+ TowardPositive = 2, ///< roundTowardPositive.
+ TowardNegative = 3, ///< roundTowardNegative.
+ NearestTiesToAway = 4, ///< roundTiesToAway.
+
+ // Special values.
+ Dynamic = 7, ///< Denotes mode unknown at compile time.
+ Invalid = -1 ///< Denotes invalid value.
+};
+
/// Represent ssubnormal handling kind for floating point instruction inputs and
/// outputs.
struct DenormalMode {
Index: llvm/include/llvm/ADT/APFloat.h
===================================================================
--- llvm/include/llvm/ADT/APFloat.h
+++ llvm/include/llvm/ADT/APFloat.h
@@ -18,6 +18,7 @@
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/FloatingPointMode.h"
#include "llvm/Support/ErrorHandling.h"
#include <memory>
@@ -182,13 +183,13 @@
};
/// IEEE-754R 4.3: Rounding-direction attributes.
- enum roundingMode {
- rmNearestTiesToEven,
- rmTowardPositive,
- rmTowardNegative,
- rmTowardZero,
- rmNearestTiesToAway
- };
+ using roundingMode = llvm::RoundingMode;
+
+ static constexpr roundingMode rmNearestTiesToEven = RoundingMode::NearestTiesToEven;
+ static constexpr roundingMode rmTowardPositive = RoundingMode::TowardPositive;
+ static constexpr roundingMode rmTowardNegative = RoundingMode::TowardNegative;
+ static constexpr roundingMode rmTowardZero = RoundingMode::TowardZero;
+ static constexpr roundingMode rmNearestTiesToAway = RoundingMode::NearestTiesToAway;
/// IEEE-754R 7: Default exception handling.
///
Index: clang/lib/Serialization/ASTReader.cpp
===================================================================
--- clang/lib/Serialization/ASTReader.cpp
+++ clang/lib/Serialization/ASTReader.cpp
@@ -89,6 +89,7 @@
#include "llvm/ADT/APSInt.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/FloatingPointMode.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/IntrusiveRefCntPtr.h"
@@ -139,6 +140,7 @@
using namespace clang::serialization;
using namespace clang::serialization::reader;
using llvm::BitstreamCursor;
+using llvm::RoundingMode;
//===----------------------------------------------------------------------===//
// ChainedASTReaderListener implementation
Index: clang/lib/Sema/SemaExpr.cpp
===================================================================
--- clang/lib/Sema/SemaExpr.cpp
+++ clang/lib/Sema/SemaExpr.cpp
@@ -50,6 +50,7 @@
#include "llvm/Support/SaveAndRestore.h"
using namespace clang;
using namespace sema;
+using llvm::RoundingMode;
/// Determine whether the use of this declaration is valid, without
/// emitting diagnostics.
@@ -13468,7 +13469,7 @@
return ExprError();
if (ResultTy->isRealFloatingType() &&
- (getLangOpts().getFPRoundingMode() != LangOptions::FPR_ToNearest ||
+ (getLangOpts().getFPRoundingMode() != RoundingMode::NearestTiesToEven ||
getLangOpts().getFPExceptionMode() != LangOptions::FPE_Ignore))
// Mark the current function as usng floating point constrained intrinsics
if (FunctionDecl *F = dyn_cast<FunctionDecl>(CurContext)) {
Index: clang/lib/Sema/SemaAttr.cpp
===================================================================
--- clang/lib/Sema/SemaAttr.cpp
+++ clang/lib/Sema/SemaAttr.cpp
@@ -940,7 +940,7 @@
}
}
-void Sema::setRoundingMode(LangOptions::FPRoundingModeKind FPR) {
+void Sema::setRoundingMode(llvm::RoundingMode FPR) {
FPFeatures.setRoundingMode(FPR);
}
Index: clang/lib/Frontend/CompilerInvocation.cpp
===================================================================
--- clang/lib/Frontend/CompilerInvocation.cpp
+++ clang/lib/Frontend/CompilerInvocation.cpp
@@ -47,6 +47,7 @@
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/CachedHashString.h"
+#include "llvm/ADT/FloatingPointMode.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/None.h"
#include "llvm/ADT/Optional.h"
@@ -3188,9 +3189,9 @@
Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
}
- LangOptions::FPRoundingModeKind FPRM = LangOptions::FPR_ToNearest;
+ auto FPRM = llvm::RoundingMode::NearestTiesToEven;
if (Args.hasArg(OPT_frounding_math)) {
- FPRM = LangOptions::FPR_Dynamic;
+ FPRM = llvm::RoundingMode::Dynamic;
}
Opts.setFPRoundingMode(FPRM);
Index: clang/lib/CodeGen/CodeGenFunction.cpp
===================================================================
--- clang/lib/CodeGen/CodeGenFunction.cpp
+++ clang/lib/CodeGen/CodeGenFunction.cpp
@@ -115,21 +115,6 @@
OMPBuilder->finalize();
}
-// Map the LangOption for rounding mode into
-// the corresponding enum in the IR.
-static llvm::fp::RoundingMode ToConstrainedRoundingMD(
- LangOptions::FPRoundingModeKind Kind) {
-
- switch (Kind) {
- case LangOptions::FPR_ToNearest: return llvm::fp::rmToNearest;
- case LangOptions::FPR_Downward: return llvm::fp::rmDownward;
- case LangOptions::FPR_Upward: return llvm::fp::rmUpward;
- case LangOptions::FPR_TowardZero: return llvm::fp::rmTowardZero;
- case LangOptions::FPR_Dynamic: return llvm::fp::rmDynamic;
- }
- llvm_unreachable("Unsupported FP RoundingMode");
-}
-
// Map the LangOption for exception behavior into
// the corresponding enum in the IR.
static llvm::fp::ExceptionBehavior ToConstrainedExceptMD(
@@ -144,18 +129,17 @@
}
void CodeGenFunction::SetFPModel() {
- auto fpRoundingMode = ToConstrainedRoundingMD(
- getLangOpts().getFPRoundingMode());
+ llvm::RoundingMode RM = getLangOpts().getFPRoundingMode();
auto fpExceptionBehavior = ToConstrainedExceptMD(
getLangOpts().getFPExceptionMode());
if (fpExceptionBehavior == llvm::fp::ebIgnore &&
- fpRoundingMode == llvm::fp::rmToNearest)
+ RM == llvm::RoundingMode::NearestTiesToEven)
// Constrained intrinsics are not used.
;
else {
Builder.setIsFPConstrained(true);
- Builder.setDefaultConstrainedRounding(fpRoundingMode);
+ Builder.setDefaultConstrainedRounding(RM);
Builder.setDefaultConstrainedExcept(fpExceptionBehavior);
}
}
Index: clang/lib/Basic/LangOptions.cpp
===================================================================
--- clang/lib/Basic/LangOptions.cpp
+++ clang/lib/Basic/LangOptions.cpp
@@ -16,7 +16,8 @@
LangOptions::LangOptions() {
#define LANGOPT(Name, Bits, Default, Description) Name = Default;
-#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) set##Name(Default);
+#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
+ set##Name(Type::Default);
#include "clang/Basic/LangOptions.def"
}
@@ -24,7 +25,7 @@
#define LANGOPT(Name, Bits, Default, Description)
#define BENIGN_LANGOPT(Name, Bits, Default, Description) Name = Default;
#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
- Name = Default;
+ Name = static_cast<unsigned>(Type::Default);
#include "clang/Basic/LangOptions.def"
// These options do not affect AST generation.
Index: clang/include/clang/Sema/Sema.h
===================================================================
--- clang/include/clang/Sema/Sema.h
+++ clang/include/clang/Sema/Sema.h
@@ -9594,7 +9594,7 @@
void ActOnPragmaFEnvAccess(LangOptions::FEnvAccessModeKind FPC);
/// Called to set rounding mode for floating point operations.
- void setRoundingMode(LangOptions::FPRoundingModeKind);
+ void setRoundingMode(llvm::RoundingMode);
/// Called to set exception behavior for floating point operations.
void setExceptionMode(LangOptions::FPExceptionModeKind);
Index: clang/include/clang/Basic/LangOptions.h
===================================================================
--- clang/include/clang/Basic/LangOptions.h
+++ clang/include/clang/Basic/LangOptions.h
@@ -19,6 +19,7 @@
#include "clang/Basic/ObjCRuntime.h"
#include "clang/Basic/Sanitizers.h"
#include "clang/Basic/Visibility.h"
+#include "llvm/ADT/FloatingPointMode.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Triple.h"
#include <string>
@@ -53,6 +54,7 @@
class LangOptions : public LangOptionsBase {
public:
using Visibility = clang::Visibility;
+ using RoundingMode = llvm::RoundingMode;
enum GCMode { NonGC, GCOnly, HybridGC };
enum StackProtectorMode { SSPOff, SSPOn, SSPStrong, SSPReq };
@@ -190,23 +192,9 @@
FEA_On
};
- // Values of the following enumerations correspond to metadata arguments
- // specified for constrained floating-point intrinsics:
- // http://llvm.org/docs/LangRef.html#constrained-floating-point-intrinsics.
-
- /// Possible rounding modes.
- enum FPRoundingModeKind {
- /// Rounding to nearest, corresponds to "round.tonearest".
- FPR_ToNearest,
- /// Rounding toward -Inf, corresponds to "round.downward".
- FPR_Downward,
- /// Rounding toward +Inf, corresponds to "round.upward".
- FPR_Upward,
- /// Rounding toward zero, corresponds to "round.towardzero".
- FPR_TowardZero,
- /// Is determined by runtime environment, corresponds to "round.dynamic".
- FPR_Dynamic
- };
+ /// Alias for RoundingMode::NearestTiesToEven.
+ static constexpr unsigned FPR_ToNearest
+ = static_cast<unsigned>(llvm::RoundingMode::NearestTiesToEven);
/// Possible floating point exception behavior.
enum FPExceptionModeKind {
@@ -386,6 +374,8 @@
/// Floating point control options
class FPOptions {
+ using RoundingMode = llvm::RoundingMode;
+
public:
FPOptions() : fp_contract(LangOptions::FPC_Off),
fenv_access(LangOptions::FEA_Off),
@@ -395,10 +385,10 @@
// Used for serializing.
explicit FPOptions(unsigned I)
- : fp_contract(static_cast<LangOptions::FPContractModeKind>(I & 3)),
- fenv_access(static_cast<LangOptions::FEnvAccessModeKind>((I >> 2) & 1)),
- rounding(static_cast<LangOptions::FPRoundingModeKind>((I >> 3) & 7)),
- exceptions(static_cast<LangOptions::FPExceptionModeKind>((I >> 6) & 3))
+ : fp_contract(I & 3),
+ fenv_access((I >> 2) & 1),
+ rounding ((I >> 3) & 7),
+ exceptions ((I >> 6) & 3)
{}
explicit FPOptions(const LangOptions &LangOpts)
@@ -437,12 +427,12 @@
void setDisallowFEnvAccess() { fenv_access = LangOptions::FEA_Off; }
- LangOptions::FPRoundingModeKind getRoundingMode() const {
- return static_cast<LangOptions::FPRoundingModeKind>(rounding);
+ RoundingMode getRoundingMode() const {
+ return static_cast<RoundingMode>(rounding);
}
- void setRoundingMode(LangOptions::FPRoundingModeKind RM) {
- rounding = RM;
+ void setRoundingMode(RoundingMode RM) {
+ rounding = static_cast<unsigned>(RM);
}
LangOptions::FPExceptionModeKind getExceptionMode() const {
@@ -454,7 +444,7 @@
}
bool isFPConstrained() const {
- return getRoundingMode() != LangOptions::FPR_ToNearest ||
+ return getRoundingMode() != RoundingMode::NearestTiesToEven ||
getExceptionMode() != LangOptions::FPE_Ignore ||
allowFEnvAccess();
}
Index: clang/include/clang/Basic/LangOptions.def
===================================================================
--- clang/include/clang/Basic/LangOptions.def
+++ clang/include/clang/Basic/LangOptions.def
@@ -121,7 +121,7 @@
LANGOPT(WritableStrings , 1, 0, "writable string support")
LANGOPT(ConstStrings , 1, 0, "const-qualified string support")
ENUM_LANGOPT(LaxVectorConversions, LaxVectorConversionKind, 2,
- LaxVectorConversionKind::All, "lax vector conversions")
+ All, "lax vector conversions")
LANGOPT(ConvergentFunctions, 1, 1, "Assume convergent functions")
LANGOPT(AltiVec , 1, 0, "AltiVec-style vector initializers")
LANGOPT(ZVector , 1, 0, "System z vector extensions")
@@ -263,7 +263,7 @@
LANGOPT(FastRelaxedMath , 1, 0, "OpenCL fast relaxed math")
/// FP_CONTRACT mode (on/off/fast).
ENUM_LANGOPT(DefaultFPContractMode, FPContractModeKind, 2, FPC_Off, "FP contraction type")
-ENUM_LANGOPT(FPRoundingMode, FPRoundingModeKind, 3, FPR_ToNearest, "FP Rounding Mode type")
+ENUM_LANGOPT(FPRoundingMode, RoundingMode, 3, NearestTiesToEven, "FP Rounding Mode type")
ENUM_LANGOPT(FPExceptionMode, FPExceptionModeKind, 2, FPE_Ignore, "FP Exception Behavior Mode type")
LANGOPT(NoBitFieldTypeAlign , 1, 0, "bit-field type alignment")
LANGOPT(HexagonQdsp6Compat , 1, 0, "hexagon-qdsp6 backward compatibility")
@@ -293,7 +293,7 @@
BENIGN_LANGOPT(SemanticInterposition , 1, 0, "semantic interposition")
ENUM_LANGOPT(StackProtector, StackProtectorMode, 2, SSPOff,
"stack protector mode")
-ENUM_LANGOPT(TrivialAutoVarInit, TrivialAutoVarInitKind, 2, TrivialAutoVarInitKind::Uninitialized,
+ENUM_LANGOPT(TrivialAutoVarInit, TrivialAutoVarInitKind, 2, Uninitialized,
"trivial automatic variable initialization")
ENUM_LANGOPT(SignedOverflowBehavior, SignedOverflowBehaviorTy, 2, SOB_Undefined,
"signed integer overflow handling")
@@ -313,7 +313,7 @@
BENIGN_LANGOPT(NumLargeByValueCopy, 32, 0,
"if non-zero, warn about parameter or return Warn if parameter/return value is larger in bytes than this setting. 0 is no check.")
VALUE_LANGOPT(MSCompatibilityVersion, 32, 0, "Microsoft Visual C/C++ Version")
-ENUM_LANGOPT(VtorDispMode, MSVtorDispMode, 2, MSVtorDispMode::ForVBaseOverride,
+ENUM_LANGOPT(VtorDispMode, MSVtorDispMode, 2, ForVBaseOverride,
"How many vtordisps to insert")
LANGOPT(ApplePragmaPack, 1, 0, "Apple gcc-compatible #pragma pack handling")
@@ -339,7 +339,7 @@
BENIGN_LANGOPT(AllowEditorPlaceholders, 1, 0,
"allow editor placeholders in source")
-ENUM_LANGOPT(ClangABICompat, ClangABI, 4, ClangABI::Latest,
+ENUM_LANGOPT(ClangABICompat, ClangABI, 4, Latest,
"version of Clang that we should attempt to be ABI-compatible "
"with")
@@ -353,9 +353,9 @@
COMPATIBLE_VALUE_LANGOPT(MaxTokens, 32, 0, "Max number of tokens per TU or 0")
-ENUM_LANGOPT(SignReturnAddressScope, SignReturnAddressScopeKind, 2, SignReturnAddressScopeKind::None,
+ENUM_LANGOPT(SignReturnAddressScope, SignReturnAddressScopeKind, 2, None,
"Scope of return address signing")
-ENUM_LANGOPT(SignReturnAddressKey, SignReturnAddressKeyKind, 1, SignReturnAddressKeyKind::AKey,
+ENUM_LANGOPT(SignReturnAddressKey, SignReturnAddressKeyKind, 1, AKey,
"Key used for return address signing")
LANGOPT(BranchTargetEnforcement, 1, 0, "Branch-target enforcement enabled")
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