mibintc updated this revision to Diff 294074.
mibintc added a comment.
Responded to @rsmith's review
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D87528/new/
https://reviews.llvm.org/D87528
Files:
clang/include/clang/Basic/DiagnosticASTKinds.td
clang/include/clang/Basic/DiagnosticParseKinds.td
clang/include/clang/Sema/Sema.h
clang/lib/AST/ExprConstant.cpp
clang/lib/CodeGen/CodeGenModule.cpp
clang/lib/CodeGen/CodeGenModule.h
clang/lib/Parse/ParsePragma.cpp
clang/lib/Parse/ParseStmt.cpp
clang/lib/Sema/SemaStmt.cpp
clang/test/CXX/expr/expr.const/p2-0x.cpp
clang/test/CodeGen/fp-floatcontrol-pragma.cpp
clang/test/CodeGen/pragma-fenv_access.c
clang/test/Parser/fp-floatcontrol-syntax.cpp
clang/test/Parser/pragma-fenv_access.c
clang/test/Preprocessor/pragma_unknown.c
Index: clang/test/Preprocessor/pragma_unknown.c
===================================================================
--- clang/test/Preprocessor/pragma_unknown.c
+++ clang/test/Preprocessor/pragma_unknown.c
@@ -16,15 +16,6 @@
// CHECK: {{^}}#pragma STDC FP_CONTRACT DEFAULT{{$}}
// CHECK: {{^}}#pragma STDC FP_CONTRACT IN_BETWEEN{{$}}
-#pragma STDC FENV_ACCESS ON // expected-warning {{pragma STDC FENV_ACCESS ON is not supported, ignoring pragma}}
-#pragma STDC FENV_ACCESS OFF
-#pragma STDC FENV_ACCESS DEFAULT
-#pragma STDC FENV_ACCESS IN_BETWEEN // expected-warning {{expected 'ON' or 'OFF' or 'DEFAULT' in pragma}}
-// CHECK: {{^}}#pragma STDC FENV_ACCESS ON{{$}}
-// CHECK: {{^}}#pragma STDC FENV_ACCESS OFF{{$}}
-// CHECK: {{^}}#pragma STDC FENV_ACCESS DEFAULT{{$}}
-// CHECK: {{^}}#pragma STDC FENV_ACCESS IN_BETWEEN{{$}}
-
#pragma STDC CX_LIMITED_RANGE ON
#pragma STDC CX_LIMITED_RANGE OFF
#pragma STDC CX_LIMITED_RANGE DEFAULT
Index: clang/test/Parser/pragma-fenv_access.c
===================================================================
--- /dev/null
+++ clang/test/Parser/pragma-fenv_access.c
@@ -0,0 +1,45 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+// RUN: %clang_cc1 -ffp-exception-behavior=strict -DSTRICT -fsyntax-only -verify %s
+// RUN: %clang_cc1 -x c++ -DCPP -DSTRICT -ffp-exception-behavior=strict -fsyntax-only -verify %s
+#ifdef CPP
+#define CONST constexpr
+#else
+#define CONST const
+#endif
+
+#pragma STDC FENV_ACCESS IN_BETWEEN // expected-warning {{expected 'ON' or 'OFF' or 'DEFAULT' in pragma}}
+
+#pragma STDC FENV_ACCESS OFF
+
+float func_04(int x, float y) {
+ if (x)
+ return y + 2;
+ #pragma STDC FENV_ACCESS ON // expected-error{{'#pragma STDC FENV_ACCESS' can only appear at file scope or at the start of a compound statement}}
+ return x + y;
+}
+
+int main() {
+ CONST float one = 1.0F ;
+ CONST float three = 3.0F ;
+ CONST float four = 4.0F ;
+ CONST float frac_ok = one/four;
+#if defined(CPP) & defined(STRICT)
+//expected-error@+3 {{constexpr variable 'frac' must be initialized by a constant expression}}
+//expected-note@+2 {{compile time floating point arithmetic suppressed in strict evaluation modes}}
+#endif
+ CONST float frac = one/three; // rounding
+ CONST double d = one;
+ CONST int not_too_big = 255;
+ CONST float fnot_too_big = not_too_big;
+ CONST int too_big = 0x7ffffff0;
+#if defined(CPP) & defined(STRICT)
+//expected-error@+6 {{constexpr variable 'fbig' must be initialized by a constant expression}}
+//expected-note@+5 {{compile time floating point arithmetic suppressed in strict evaluation modes}}
+#endif
+#if defined(CPP)
+//expected-warning@+2{{implicit conversion}}
+#endif
+ CONST float fbig = too_big; // inexact
+ if (one <= four) return 0;
+ return -1;
+}
Index: clang/test/Parser/fp-floatcontrol-syntax.cpp
===================================================================
--- clang/test/Parser/fp-floatcontrol-syntax.cpp
+++ clang/test/Parser/fp-floatcontrol-syntax.cpp
@@ -26,19 +26,14 @@
double a = 0.0;
double b = 1.0;
-//FIXME At some point this warning will be removed, until then
-// document the warning
-#ifdef FAST
-// expected-warning@+1{{pragma STDC FENV_ACCESS ON is not supported, ignoring pragma}}
-#pragma STDC FENV_ACCESS ON
-#else
-#pragma STDC FENV_ACCESS ON // expected-warning{{pragma STDC FENV_ACCESS ON is not supported, ignoring pragma}}
-#endif
#ifdef STRICT
#pragma float_control(precise, off) // expected-error {{'#pragma float_control(precise, off)' is illegal when except is enabled}}
#else
+#ifndef FAST
// Currently FENV_ACCESS cannot be enabled by pragma, skip error check
-#pragma float_control(precise, off) // not-expected-error {{'#pragma float_control(precise, off)' is illegal when fenv_access is enabled}}
+#pragma STDC FENV_ACCESS ON
+#pragma float_control(precise, off) // expected-error {{'#pragma float_control(precise, off)' is illegal when fenv_access is enabled}}
+#endif
#endif
#pragma float_control(precise, on)
Index: clang/test/CodeGen/pragma-fenv_access.c
===================================================================
--- /dev/null
+++ clang/test/CodeGen/pragma-fenv_access.c
@@ -0,0 +1,65 @@
+// RUN: %clang_cc1 -ffp-exception-behavior=strict -triple %itanium_abi_triple -emit-llvm %s -o - | FileCheck %s
+
+#pragma STDC FENV_ACCESS ON
+
+float func_01(float x, float y) {
+ return x + y;
+}
+// CHECK-LABEL: @func_01
+// CHECK: call float @llvm.experimental.constrained.fadd.f32(float {{.*}}, float {{.*}}, metadata !"round.tonearest", metadata !"fpexcept.strict")
+
+
+float func_02(float x, float y) {
+ #pragma float_control(except, off)
+ #pragma STDC FENV_ACCESS OFF
+ return x + y;
+}
+// CHECK-LABEL: @func_02
+// CHECK: fadd float {{.*}}
+
+
+float func_03(float x, float y) {
+ return x + y;
+}
+// CHECK-LABEL: @func_03
+// CHECK: call float @llvm.experimental.constrained.fadd.f32(float {{.*}}, float {{.*}}, metadata !"round.tonearest", metadata !"fpexcept.strict")
+
+
+#pragma STDC FENV_ACCESS OFF
+
+float func_04(float x, float y) {
+ #pragma float_control(except, off)
+ return x + y;
+}
+// CHECK-LABEL: @func_04
+// CHECK: fadd float {{.*}}
+
+
+float func_05(float x, float y) {
+ #pragma STDC FENV_ACCESS ON
+ return x + y;
+}
+// CHECK-LABEL: @func_05
+// CHECK: call float @llvm.experimental.constrained.fadd.f32(float {{.*}}, float {{.*}}, metadata !"round.tonearest", metadata !"fpexcept.strict")
+
+
+float func_06(float x, float y) {
+ #pragma float_control(except, off)
+ return x + y;
+}
+// CHECK-LABEL: @func_06
+// CHECK: fadd float {{.*}}
+
+
+float func_07(float x, float y) {
+ x -= y;
+ if (x) {
+ #pragma STDC FENV_ACCESS ON
+ y *= 2;
+ }
+ return y + 4;
+}
+// CHECK-LABEL: @func_07
+// CHECK: call float @llvm.experimental.constrained.fsub.f32(float {{.*}}, float {{.*}}, metadata !"round.tonearest", metadata !"fpexcept.strict")
+// CHECK: call float @llvm.experimental.constrained.fmul.f32(float {{.*}}, float {{.*}}, metadata !"round.tonearest", metadata !"fpexcept.strict")
+// CHECK: call float @llvm.experimental.constrained.fadd.f32(float {{.*}}, float {{.*}}, metadata !"round.tonearest", metadata !"fpexcept.strict")
Index: clang/test/CodeGen/fp-floatcontrol-pragma.cpp
===================================================================
--- clang/test/CodeGen/fp-floatcontrol-pragma.cpp
+++ clang/test/CodeGen/fp-floatcontrol-pragma.cpp
@@ -1,6 +1,6 @@
// RUN: %clang_cc1 -DEXCEPT=1 -fcxx-exceptions -triple x86_64-linux-gnu -emit-llvm -o - %s | FileCheck -check-prefix=CHECK-NS %s
// RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -o - %s | FileCheck %s
-// RUN: %clang_cc1 -verify -DFENV_ON=1 -triple x86_64-linux-gnu -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -DFENV_ON=1 -triple x86_64-linux-gnu -emit-llvm -o - %s | FileCheck -check-prefix=CHECK-FENV %s
// RUN: %clang_cc1 -triple %itanium_abi_triple -O3 -emit-llvm -o - %s | FileCheck -check-prefix=CHECK-O3 %s
// Verify float_control(precise, off) enables fast math flags on fp operations.
@@ -138,7 +138,6 @@
// CHECK-LABEL define float {{.*}}test_OperatorCall{{.*}}
#if FENV_ON
-// expected-warning@+1{{pragma STDC FENV_ACCESS ON is not supported, ignoring pragma}}
#pragma STDC FENV_ACCESS ON
#endif
// CHECK-LABEL: define {{.*}}callt{{.*}}
@@ -146,7 +145,21 @@
void callt() {
volatile float z;
z = z * z;
-//CHECK: = fmul float
+ //CHECK-FENV: llvm.experimental.constrained.fmul{{.*}}
+}
+
+// CHECK-LABEL: define {{.*}}myAdd{{.*}}
+float myAdd(int i, float f) {
+ if (i<0)
+ return 1.0 + 2.0;
+ // Check that floating point constant folding doesn't occur if
+ // #pragma STC FENV_ACCESS is enabled.
+ //CHECK-FENV: llvm.experimental.constrained.fadd{{.*}}double 1.0{{.*}}double 2.0{{.*}}
+ //CHECK: store float 3.0{{.*}}retval{{.*}}
+ static double v = 1.0 / 3.0;
+ //CHECK-FENV: llvm.experimental.constrained.fdiv{{.*}}double 1.0{{.*}}double 3.0{{.*}}
+ //CHECK-NOT: fdiv
+ return v;
}
#if EXCEPT
Index: clang/test/CXX/expr/expr.const/p2-0x.cpp
===================================================================
--- clang/test/CXX/expr/expr.const/p2-0x.cpp
+++ clang/test/CXX/expr/expr.const/p2-0x.cpp
@@ -280,6 +280,16 @@
constexpr float f10 = f2 - f2; // expected-error {{constant expression}} expected-note {{produces a NaN}}
constexpr float f11 = f2 + f4; // expected-error {{constant expression}} expected-note {{produces a NaN}}
constexpr float f12 = f2 / f2; // expected-error {{constant expression}} expected-note {{produces a NaN}}
+#pragma float_control(push)
+#pragma float_control(except, on)
+constexpr float pi = 3.14f;
+constexpr unsigned ubig = 0xFFFFFFFF;
+constexpr float ce = 1.0 / 3.0; // expected-error {{constant expression}} expected-note {{floating point arithmetic suppressed in strict evaluation modes}}
+constexpr int ci = (int) pi;
+constexpr float fbig = (float) ubig; // expected-error {{constant expression}} expected-note {{floating point arithmetic suppressed in strict evaluation modes}}
+constexpr float fabspi = __builtin_fabs(pi); // expected-error {{constant expression}} expected-note {{floating point arithmetic suppressed in strict evaluation modes}}
+constexpr float negpi = -pi; // expect no error on unary operator
+#pragma float_control(pop)
static_assert(!isinf(f1), "");
static_assert(isinf(f2), "");
static_assert(!isinf(f3), "");
Index: clang/lib/Sema/SemaStmt.cpp
===================================================================
--- clang/lib/Sema/SemaStmt.cpp
+++ clang/lib/Sema/SemaStmt.cpp
@@ -389,6 +389,13 @@
PopCompoundScope();
}
+void Sema::ActOnAfterCompoundStatementLeadingPragmas() {
+ if (getCurFPFeatures().getAllowFEnvAccess()) {
+ FunctionDecl *F = getCurFunctionDecl();
+ F->setUsesFPIntrin(true);
+ }
+}
+
sema::CompoundScopeInfo &Sema::getCurCompoundScope() const {
return getCurFunction()->CompoundScopes.back();
}
Index: clang/lib/Parse/ParseStmt.cpp
===================================================================
--- clang/lib/Parse/ParseStmt.cpp
+++ clang/lib/Parse/ParseStmt.cpp
@@ -366,7 +366,8 @@
case tok::annot_pragma_fenv_access:
ProhibitAttributes(Attrs);
- HandlePragmaFEnvAccess();
+ Diag(Tok, diag::err_pragma_stdc_fenv_access_scope);
+ ConsumeAnnotationToken();
return StmtEmpty();
case tok::annot_pragma_fenv_round:
@@ -1033,9 +1034,9 @@
Tok.getLocation(),
"in compound statement ('{}')");
- // Record the state of the FPFeatures, restore on leaving the
+ // Record the current FPFeatures, restore on leaving the
// compound statement.
- Sema::FPFeaturesStateRAII SaveFPContractState(Actions);
+ Sema::FPFeaturesStateRAII SaveFPFeatures(Actions);
InMessageExpressionRAIIObject InMessage(*this, false);
BalancedDelimiterTracker T(*this, tok::l_brace);
@@ -1046,6 +1047,7 @@
// Parse any pragmas at the beginning of the compound statement.
ParseCompoundStatementLeadingPragmas();
+ Actions.ActOnAfterCompoundStatementLeadingPragmas();
StmtVector Stmts;
Index: clang/lib/Parse/ParsePragma.cpp
===================================================================
--- clang/lib/Parse/ParsePragma.cpp
+++ clang/lib/Parse/ParsePragma.cpp
@@ -106,10 +106,6 @@
tok::OnOffSwitch OOS;
if (PP.LexOnOffSwitch(OOS))
return;
- if (OOS == tok::OOS_ON) {
- PP.Diag(Tok, diag::warn_stdc_fenv_access_not_supported);
- return;
- }
MutableArrayRef<Token> Toks(PP.getPreprocessorAllocator().Allocate<Token>(1),
1);
Index: clang/lib/CodeGen/CodeGenModule.h
===================================================================
--- clang/lib/CodeGen/CodeGenModule.h
+++ clang/lib/CodeGen/CodeGenModule.h
@@ -1137,6 +1137,10 @@
/// definition.
void SetLLVMFunctionAttributesForDefinition(const Decl *D, llvm::Function *F);
+ /// Set the LLVM function attributes that represent floating point
+ /// environment.
+ void setLLVMFunctionFEnvAttributes(const FunctionDecl *D, llvm::Function *F);
+
/// Return true iff the given type uses 'sret' when used as a return type.
bool ReturnTypeUsesSRet(const CGFunctionInfo &FI);
Index: clang/lib/CodeGen/CodeGenModule.cpp
===================================================================
--- clang/lib/CodeGen/CodeGenModule.cpp
+++ clang/lib/CodeGen/CodeGenModule.cpp
@@ -1725,6 +1725,15 @@
}
}
+void CodeGenModule::setLLVMFunctionFEnvAttributes(const FunctionDecl *D,
+ llvm::Function *F) {
+ if (D->usesFPIntrin()) {
+ llvm::AttrBuilder FuncAttrs;
+ FuncAttrs.addAttribute("strictfp");
+ F->addAttributes(llvm::AttributeList::FunctionIndex, FuncAttrs);
+ }
+}
+
void CodeGenModule::SetCommonAttributes(GlobalDecl GD, llvm::GlobalValue *GV) {
const Decl *D = GD.getDecl();
if (dyn_cast_or_null<NamedDecl>(D))
@@ -4554,9 +4563,11 @@
MaybeHandleStaticInExternC(D, Fn);
-
maybeSetTrivialComdat(*D, *Fn);
+ // Set CodeGen attributes that represent floating point environment.
+ setLLVMFunctionFEnvAttributes(D, Fn);
+
CodeGenFunction(*this).GenerateCode(GD, Fn, FI);
setNonAliasAttributes(GD, Fn);
Index: clang/lib/AST/ExprConstant.cpp
===================================================================
--- clang/lib/AST/ExprConstant.cpp
+++ clang/lib/AST/ExprConstant.cpp
@@ -2435,11 +2435,17 @@
}
static bool HandleIntToFloatCast(EvalInfo &Info, const Expr *E,
+ const FPOptions fpOptions,
QualType SrcType, const APSInt &Value,
QualType DestType, APFloat &Result) {
Result = APFloat(Info.Ctx.getFloatTypeSemantics(DestType), 1);
- Result.convertFromAPInt(Value, Value.isSigned(),
- APFloat::rmNearestTiesToEven);
+ if (llvm::APFloatBase::opOK != Result.convertFromAPInt(Value,
+ Value.isSigned(),
+ APFloat::rmNearestTiesToEven) &&
+ fpOptions.isFPConstrained()) {
+ Info.CCEDiag(E, diag::note_constexpr_float_arithmetic_strict);
+ return false;
+ }
return true;
}
@@ -2640,31 +2646,38 @@
}
/// Perform the given binary floating-point operation, in-place, on LHS.
-static bool handleFloatFloatBinOp(EvalInfo &Info, const Expr *E,
+static bool handleFloatFloatBinOp(EvalInfo &Info, const BinaryOperator *E,
APFloat &LHS, BinaryOperatorKind Opcode,
const APFloat &RHS) {
+ assert(E != nullptr);
+ llvm::APFloatBase::opStatus status;
switch (Opcode) {
default:
Info.FFDiag(E);
return false;
case BO_Mul:
- LHS.multiply(RHS, APFloat::rmNearestTiesToEven);
+ status = LHS.multiply(RHS, APFloat::rmNearestTiesToEven);
break;
case BO_Add:
- LHS.add(RHS, APFloat::rmNearestTiesToEven);
+ status = LHS.add(RHS, APFloat::rmNearestTiesToEven);
break;
case BO_Sub:
- LHS.subtract(RHS, APFloat::rmNearestTiesToEven);
+ status = LHS.subtract(RHS, APFloat::rmNearestTiesToEven);
break;
case BO_Div:
// [expr.mul]p4:
// If the second operand of / or % is zero the behavior is undefined.
if (RHS.isZero())
Info.CCEDiag(E, diag::note_expr_divide_by_zero);
- LHS.divide(RHS, APFloat::rmNearestTiesToEven);
+ status = LHS.divide(RHS, APFloat::rmNearestTiesToEven);
break;
}
+ if (E->getFPFeaturesInEffect(Info.Ctx.getLangOpts()).isFPConstrained() &&
+ llvm::APFloatBase::opOK != status) {
+ Info.FFDiag(E, diag::note_constexpr_float_arithmetic_strict);
+ return false;
+ }
// [expr.pre]p4:
// If during the evaluation of an expression, the result is not
// mathematically defined [...], the behavior is undefined.
@@ -2811,8 +2824,8 @@
"Mismatched LHS/RHS/Result Type");
APFloat LHSFloat = LHSElt.getFloat();
- if (!handleFloatFloatBinOp(Info, E, LHSFloat, Opcode,
- RHSElt.getFloat())) {
+ if (!handleFloatFloatBinOp(Info, dyn_cast<BinaryOperator>(E), LHSFloat,
+ Opcode, RHSElt.getFloat())) {
Info.FFDiag(E);
return false;
}
@@ -4142,10 +4155,13 @@
Value = HandleIntToIntCast(Info, E, SubobjType, PromotedLHSType, LHS);
return true;
} else if (RHS.isFloat()) {
+ const BinaryOperator *BE = dyn_cast<BinaryOperator>(E);
+ const FPOptions fpOptions = BE->getFPFeaturesInEffect(
+ Info.Ctx.getLangOpts());
APFloat FValue(0.0);
- return HandleIntToFloatCast(Info, E, SubobjType, Value, PromotedLHSType,
- FValue) &&
- handleFloatFloatBinOp(Info, E, FValue, Opcode, RHS.getFloat()) &&
+ return HandleIntToFloatCast(Info, E, fpOptions, SubobjType, Value,
+ PromotedLHSType, FValue) &&
+ handleFloatFloatBinOp(Info, BE, FValue, Opcode, RHS.getFloat()) &&
HandleFloatToIntCast(Info, E, PromotedLHSType, FValue, SubobjType,
Value);
}
@@ -4157,7 +4173,8 @@
return checkConst(SubobjType) &&
HandleFloatToFloatCast(Info, E, SubobjType, PromotedLHSType,
Value) &&
- handleFloatFloatBinOp(Info, E, Value, Opcode, RHS.getFloat()) &&
+ handleFloatFloatBinOp(Info, dyn_cast<BinaryOperator>(E), Value,
+ Opcode, RHS.getFloat()) &&
HandleFloatToFloatCast(Info, E, PromotedLHSType, SubobjType, Value);
}
bool foundPointer(APValue &Subobj, QualType SubobjType) {
@@ -12220,6 +12237,10 @@
if (LHSTy->isRealFloatingType() &&
RHSTy->isRealFloatingType()) {
+ // Note: Compares may raise invalid in some cases involving NaN or sNaN.
+ // but this doesn't affect constant folding since NaN are
+ // not constant expressions.
+
APFloat RHS(0.0), LHS(0.0);
bool LHSOK = EvaluateFloat(E->getRHS(), RHS, Info);
@@ -13266,6 +13287,10 @@
case Builtin::BI__builtin_fabsf:
case Builtin::BI__builtin_fabsl:
case Builtin::BI__builtin_fabsf128:
+ // The c lang ref says that "fabs raises no floating-point exceptions,
+ // even if x is a signaling NaN. The returned value is independent of
+ // the current rounding direction mode." Therefore constant folding can
+ // proceed without regard to the floating point settings.
if (!EvaluateFloat(E->getArg(0), Result, Info))
return false;
@@ -13319,6 +13344,8 @@
}
bool FloatExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) {
+ // In C lang ref, the unary - raises no floating point exceptions,
+ // even if the operand is signalling.
switch (E->getOpcode()) {
default: return Error(E);
case UO_Plus:
@@ -13348,6 +13375,14 @@
return true;
}
+static bool isWideningFPConversion(const QualType DestType,
+ const QualType SourceType) {
+ const BuiltinType *ST = dyn_cast<BuiltinType>(SourceType);
+ const BuiltinType *DT = dyn_cast<BuiltinType>(DestType);
+ return ST && DT && DT->isRealFloatingType() && ST->isRealFloatingType() &&
+ ST->getKind() <= DT->getKind();
+}
+
bool FloatExprEvaluator::VisitCastExpr(const CastExpr *E) {
const Expr* SubExpr = E->getSubExpr();
@@ -13357,14 +13392,24 @@
case CK_IntegralToFloating: {
APSInt IntResult;
+ const FPOptions fpOptions = E->getFPFeaturesInEffect(
+ Info.Ctx.getLangOpts());
return EvaluateInteger(SubExpr, IntResult, Info) &&
- HandleIntToFloatCast(Info, E, SubExpr->getType(), IntResult,
- E->getType(), Result);
+ HandleIntToFloatCast(Info, E, fpOptions, SubExpr->getType(),
+ IntResult, E->getType(), Result);
}
case CK_FloatingCast: {
if (!Visit(SubExpr))
return false;
+ if (E->getFPFeaturesInEffect(Info.Ctx.getLangOpts()).isFPConstrained() &&
+ !isWideningFPConversion(E->getType(), SubExpr->getType())) {
+ // In C lang ref, footnote, cast may raise inexact exception.
+ // Cast may also raise invalid.
+ // Widening conversions do not raise FP exceptions.
+ Info.CCEDiag(E, diag::note_constexpr_float_arithmetic_strict);
+ return false;
+ }
return HandleFloatToFloatCast(Info, E, SubExpr->getType(), E->getType(),
Result);
}
@@ -13587,13 +13632,15 @@
if (!Visit(E->getSubExpr()))
return false;
+ const FPOptions fpOptions = E->getFPFeaturesInEffect(
+ Info.Ctx.getLangOpts());
QualType To = E->getType()->castAs<ComplexType>()->getElementType();
QualType From
= E->getSubExpr()->getType()->castAs<ComplexType>()->getElementType();
Result.makeComplexFloat();
- return HandleIntToFloatCast(Info, E, From, Result.IntReal,
+ return HandleIntToFloatCast(Info, E, fpOptions, From, Result.IntReal,
To, Result.FloatReal) &&
- HandleIntToFloatCast(Info, E, From, Result.IntImag,
+ HandleIntToFloatCast(Info, E, fpOptions, From, Result.IntImag,
To, Result.FloatImag);
}
}
Index: clang/include/clang/Sema/Sema.h
===================================================================
--- clang/include/clang/Sema/Sema.h
+++ clang/include/clang/Sema/Sema.h
@@ -4344,6 +4344,7 @@
void ActOnFinishOfCompoundStmt();
StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R,
ArrayRef<Stmt *> Elts, bool isStmtExpr);
+ void ActOnAfterCompoundStatementLeadingPragmas();
/// A RAII object to enter scope of a compound statement.
class CompoundScopeRAII {
Index: clang/include/clang/Basic/DiagnosticParseKinds.td
===================================================================
--- clang/include/clang/Basic/DiagnosticParseKinds.td
+++ clang/include/clang/Basic/DiagnosticParseKinds.td
@@ -1133,9 +1133,9 @@
// - #pragma stdc unknown
def ext_stdc_pragma_ignored : ExtWarn<"unknown pragma in STDC namespace">,
InGroup<UnknownPragmas>;
-def warn_stdc_fenv_access_not_supported :
- Warning<"pragma STDC FENV_ACCESS ON is not supported, ignoring pragma">,
- InGroup<UnknownPragmas>;
+def err_pragma_stdc_fenv_access_scope : Error<
+ "'#pragma STDC FENV_ACCESS' can only appear at file scope or at the start of a "
+ "compound statement">;
def warn_stdc_fenv_round_not_supported :
Warning<"pragma STDC FENV_ROUND is not supported">,
InGroup<UnknownPragmas>;
Index: clang/include/clang/Basic/DiagnosticASTKinds.td
===================================================================
--- clang/include/clang/Basic/DiagnosticASTKinds.td
+++ clang/include/clang/Basic/DiagnosticASTKinds.td
@@ -72,6 +72,8 @@
"in a constant expression">;
def note_constexpr_float_arithmetic : Note<
"floating point arithmetic produces %select{an infinity|a NaN}0">;
+def note_constexpr_float_arithmetic_strict : Note<
+ "compile time floating point arithmetic suppressed in strict evaluation modes">;
def note_constexpr_pointer_subtraction_not_same_array : Note<
"subtracted pointers are not elements of the same array">;
def note_constexpr_pointer_subtraction_zero_size : Note<
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