[clang] 7dd387d - [clang] Add __builtin_isfpclass
Serge Pavlov via cfe-commits
cfe-commits at lists.llvm.org
Sun Jun 18 08:55:33 PDT 2023
Author: Serge Pavlov
Date: 2023-06-18T22:53:32+07:00
New Revision: 7dd387d2971d7759cadfffeb2082439f6c7ddd49
URL: https://github.com/llvm/llvm-project/commit/7dd387d2971d7759cadfffeb2082439f6c7ddd49
DIFF: https://github.com/llvm/llvm-project/commit/7dd387d2971d7759cadfffeb2082439f6c7ddd49.diff
LOG: [clang] Add __builtin_isfpclass
A new builtin function __builtin_isfpclass is added. It is called as:
__builtin_isfpclass(<floating point value>, <test>)
and returns an integer value, which is non-zero if the floating point
argument falls into one of the classes specified by the second argument,
and zero otherwise. The set of classes is an integer value, where each
value class is represented by a bit. There are ten data classes, as
defined by the IEEE-754 standard, they are represented by bits:
0x0001 (__FPCLASS_SNAN) - Signaling NaN
0x0002 (__FPCLASS_QNAN) - Quiet NaN
0x0004 (__FPCLASS_NEGINF) - Negative infinity
0x0008 (__FPCLASS_NEGNORMAL) - Negative normal
0x0010 (__FPCLASS_NEGSUBNORMAL) - Negative subnormal
0x0020 (__FPCLASS_NEGZERO) - Negative zero
0x0040 (__FPCLASS_POSZERO) - Positive zero
0x0080 (__FPCLASS_POSSUBNORMAL) - Positive subnormal
0x0100 (__FPCLASS_POSNORMAL) - Positive normal
0x0200 (__FPCLASS_POSINF) - Positive infinity
They have corresponding builtin macros to facilitate using the builtin
function:
if (__builtin_isfpclass(x, __FPCLASS_NEGZERO | __FPCLASS_POSZERO) {
// x is any zero.
}
The data class encoding is identical to that used in llvm.is.fpclass
function.
Differential Revision: https://reviews.llvm.org/D152351
Added:
clang/test/CodeGen/isfpclass.c
Modified:
clang/docs/LanguageExtensions.rst
clang/docs/ReleaseNotes.rst
clang/include/clang/Basic/Builtins.def
clang/lib/AST/ExprConstant.cpp
clang/lib/CodeGen/CGBuiltin.cpp
clang/lib/Frontend/InitPreprocessor.cpp
clang/lib/Sema/SemaChecking.cpp
clang/test/CodeGen/builtins.c
clang/test/Preprocessor/init-aarch64.c
clang/test/Preprocessor/init.c
clang/test/Sema/builtins.c
clang/test/Sema/constant-builtins-2.c
llvm/include/llvm/IR/IRBuilder.h
llvm/lib/IR/IRBuilder.cpp
Removed:
################################################################################
diff --git a/clang/docs/LanguageExtensions.rst b/clang/docs/LanguageExtensions.rst
index f37db774a0f7b..4bcb05d202234 100644
--- a/clang/docs/LanguageExtensions.rst
+++ b/clang/docs/LanguageExtensions.rst
@@ -3489,6 +3489,68 @@ Query for this feature with ``__has_builtin(__builtin_add_overflow)``, etc.
Floating point builtins
---------------------------------------
+``__builtin_isfpclass``
+-----------------------
+
+``__builtin_isfpclass`` is used to test if the specified floating-point value
+falls into one of the specified floating-point classes.
+
+**Syntax**:
+
+.. code-block:: c++
+
+ int __builtin_isfpclass(fp_type expr, int mask)
+
+``fp_type`` is a floating-point type supported by the target. ``mask`` is an
+integer constant expression, where each bit represents floating-point class to
+test. The function returns boolean value.
+
+**Example of use**:
+
+.. code-block:: c++
+
+ if (__builtin_isfpclass(x, 448)) {
+ // `x` is positive finite value
+ ...
+ }
+
+**Description**:
+
+The ``__builtin_isfpclass()`` builtin is a generalization of functions ``isnan``,
+``isinf``, ``isfinite`` and some others defined by the C standard. It tests if
+the floating-point value, specified by the first argument, falls into any of data
+classes, specified by the second argument. The later is a bitmask, in which each
+data class is represented by a bit using the encoding:
+
+========== =================== ======================
+Mask value Data class Macro
+========== =================== ======================
+0x0001 Signaling NaN __FPCLASS_SNAN
+0x0002 Quiet NaN __FPCLASS_QNAN
+0x0004 Negative infinity __FPCLASS_NEGINF
+0x0008 Negative normal __FPCLASS_NEGNORMAL
+0x0010 Negative subnormal __FPCLASS_NEGSUBNORMAL
+0x0020 Negative zero __FPCLASS_NEGZERO
+0x0040 Positive zero __FPCLASS_POSZERO
+0x0080 Positive subnormal __FPCLASS_POSSUBNORMAL
+0x0100 Positive normal __FPCLASS_POSNORMAL
+0x0200 Positive infinity __FPCLASS_POSINF
+
+For convenience preprocessor defines macros for these values. The function
+returns 1 if ``expr`` falls into one of the specified data classes, 0 otherwise.
+
+In the example above the mask value 448 (0x1C0) contains the bits selecting
+positive zero, positive subnormal and positive normal classes.
+``__builtin_isfpclass(x, 448)`` would return true only if ``x`` if of any of
+these data classes. Using suitable mask value, the function can implement any of
+the standard classification functions, for example, ``__builtin_isfpclass(x, 3)``
+is identical to ``isnan``,``__builtin_isfpclass(x, 504)`` - to ``isfinite``
+and so on.
+
+This function never raises floating-point exceptions and does not canonicalize
+its input. The floating-point argument is not promoted, its data class is
+determined based on its representation in its actual semantic type.
+
``__builtin_canonicalize``
--------------------------
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 2f6fcaf0a191f..6cee1c83706aa 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -226,6 +226,8 @@ Non-comprehensive list of changes in this release
This fixes (`#58951 <https://github.com/llvm/llvm-project/issues/58951>`_).
- Clang now supports the `NO_COLOR <https://no-color.org/>`_ environment
variable as a way to disable color diagnostics.
+- Clang now supports ``__builtin_isfpclass``, which checks if the specified
+ floating-point value falls into any of the specified data classes.
New Compiler Flags
------------------
diff --git a/clang/include/clang/Basic/Builtins.def b/clang/include/clang/Basic/Builtins.def
index 4f18c48d0ce40..59b61b89bd245 100644
--- a/clang/include/clang/Basic/Builtins.def
+++ b/clang/include/clang/Basic/Builtins.def
@@ -488,6 +488,7 @@ BUILTIN(__builtin_isinf, "i.", "FnctE")
BUILTIN(__builtin_isinf_sign, "i.", "FnctE")
BUILTIN(__builtin_isnan, "i.", "FnctE")
BUILTIN(__builtin_isnormal, "i.", "FnctE")
+BUILTIN(__builtin_isfpclass, "i.", "nctE")
// FP signbit builtins
BUILTIN(__builtin_signbit, "i.", "Fnct")
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index 5578dfc8f8743..8b1e59f13d1f3 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -12155,6 +12155,16 @@ bool IntExprEvaluator::VisitBuiltinCallExpr(const CallExpr *E,
Success(Val.isNormal() ? 1 : 0, E);
}
+ case Builtin::BI__builtin_isfpclass: {
+ APSInt MaskVal;
+ if (!EvaluateInteger(E->getArg(1), MaskVal, Info))
+ return false;
+ unsigned Test = static_cast<llvm::FPClassTest>(MaskVal.getZExtValue());
+ APFloat Val(0.0);
+ return EvaluateFloat(E->getArg(0), Val, Info) &&
+ Success((Val.classify() & Test) ? 1 : 0, E);
+ }
+
case Builtin::BI__builtin_parity:
case Builtin::BI__builtin_parityl:
case Builtin::BI__builtin_parityll: {
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 15671b48033e5..69438960ebf23 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -3131,6 +3131,17 @@ RValue CodeGenFunction::EmitBuiltinExpr(const GlobalDecl GD, unsigned BuiltinID,
return RValue::get(V);
}
+ case Builtin::BI__builtin_isfpclass: {
+ Expr::EvalResult Result;
+ if (!E->getArg(1)->EvaluateAsInt(Result, CGM.getContext()))
+ break;
+ uint64_t Test = Result.Val.getInt().getLimitedValue();
+ CodeGenFunction::CGFPOptionsRAII FPOptsRAII(*this, E);
+ Value *V = EmitScalarExpr(E->getArg(0));
+ return RValue::get(Builder.CreateZExt(Builder.createIsFPClass(V, Test),
+ ConvertType(E->getType())));
+ }
+
case Builtin::BI__builtin_nondeterministic_value: {
llvm::Type *Ty = ConvertType(E->getArg(0)->getType());
diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
index 052de378bd488..76392c104de26 100644
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -795,6 +795,18 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
Builder.defineMacro("__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES", "3");
Builder.defineMacro("__OPENCL_MEMORY_SCOPE_SUB_GROUP", "4");
+ // Define macros for floating-point data classes, used in __builtin_isfpclass.
+ Builder.defineMacro("__FPCLASS_SNAN", "0x0001");
+ Builder.defineMacro("__FPCLASS_QNAN", "0x0002");
+ Builder.defineMacro("__FPCLASS_NEGINF", "0x0004");
+ Builder.defineMacro("__FPCLASS_NEGNORMAL", "0x0008");
+ Builder.defineMacro("__FPCLASS_NEGSUBNORMAL", "0x0010");
+ Builder.defineMacro("__FPCLASS_NEGZERO", "0x0020");
+ Builder.defineMacro("__FPCLASS_POSZERO", "0x0040");
+ Builder.defineMacro("__FPCLASS_POSSUBNORMAL", "0x0080");
+ Builder.defineMacro("__FPCLASS_POSNORMAL", "0x0100");
+ Builder.defineMacro("__FPCLASS_POSINF", "0x0200");
+
// Support for #pragma redefine_extname (Sun compatibility)
Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1");
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index 34e1476d152e4..d3b37c1fa70a2 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -2170,6 +2170,10 @@ Sema::CheckBuiltinFunctionCall(FunctionDecl *FDecl, unsigned BuiltinID,
if (SemaBuiltinFPClassification(TheCall, 6))
return ExprError();
break;
+ case Builtin::BI__builtin_isfpclass:
+ if (SemaBuiltinFPClassification(TheCall, 2))
+ return ExprError();
+ break;
case Builtin::BI__builtin_isfinite:
case Builtin::BI__builtin_isinf:
case Builtin::BI__builtin_isinf_sign:
@@ -7688,9 +7692,12 @@ bool Sema::SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs) {
if (checkArgCount(*this, TheCall, NumArgs))
return true;
- // __builtin_fpclassify is the only case where NumArgs != 1, so we can count
- // on all preceding parameters just being int. Try all of those.
- for (unsigned i = 0; i < NumArgs - 1; ++i) {
+ // Find out position of floating-point argument.
+ unsigned FPArgNo = (NumArgs == 2) ? 0 : NumArgs - 1;
+
+ // We can count on all parameters preceding the floating-point just being int.
+ // Try all of those.
+ for (unsigned i = 0; i < FPArgNo; ++i) {
Expr *Arg = TheCall->getArg(i);
if (Arg->isTypeDependent())
@@ -7703,7 +7710,7 @@ bool Sema::SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs) {
TheCall->setArg(i, Res.get());
}
- Expr *OrigArg = TheCall->getArg(NumArgs-1);
+ Expr *OrigArg = TheCall->getArg(FPArgNo);
if (OrigArg->isTypeDependent())
return false;
@@ -7715,7 +7722,7 @@ bool Sema::SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs) {
OrigArg = UsualUnaryConversions(OrigArg).get();
else
OrigArg = DefaultFunctionArrayLvalueConversion(OrigArg).get();
- TheCall->setArg(NumArgs - 1, OrigArg);
+ TheCall->setArg(FPArgNo, OrigArg);
// This operation requires a non-_Complex floating-point number.
if (!OrigArg->getType()->isRealFloatingType())
@@ -7723,6 +7730,12 @@ bool Sema::SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs) {
diag::err_typecheck_call_invalid_unary_fp)
<< OrigArg->getType() << OrigArg->getSourceRange();
+ // __builtin_isfpclass has integer parameter that specify test mask. It is
+ // passed in (...), so it should be analyzed completely here.
+ if (NumArgs == 2)
+ if (SemaBuiltinConstantArgRange(TheCall, 1, 0, llvm::fcAllFlags))
+ return true;
+
return false;
}
diff --git a/clang/test/CodeGen/builtins.c b/clang/test/CodeGen/builtins.c
index 1281c5e13ae3e..c42860923568f 100644
--- a/clang/test/CodeGen/builtins.c
+++ b/clang/test/CodeGen/builtins.c
@@ -63,6 +63,7 @@ int main(void) {
P(isinf, (1.));
P(isinf_sign, (1.));
P(isnan, (1.));
+ P(isfpclass, (1., 1));
// Bitwise & Numeric Functions
diff --git a/clang/test/CodeGen/isfpclass.c b/clang/test/CodeGen/isfpclass.c
new file mode 100644
index 0000000000000..38d5ed85531b6
--- /dev/null
+++ b/clang/test/CodeGen/isfpclass.c
@@ -0,0 +1,86 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 2
+// RUN: %clang_cc1 -triple aarch64-linux-gnu -target-feature +avx512fp16 -S -O1 -emit-llvm %s -o - | FileCheck %s
+
+// CHECK-LABEL: define dso_local i1 @check_isfpclass_finite
+// CHECK-SAME: (float noundef [[X:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[TMP0:%.*]] = tail call i1 @llvm.is.fpclass.f32(float [[X]], i32 504)
+// CHECK-NEXT: ret i1 [[TMP0]]
+//
+_Bool check_isfpclass_finite(float x) {
+ return __builtin_isfpclass(x, 504 /*Finite*/);
+}
+
+// CHECK-LABEL: define dso_local i1 @check_isfpclass_finite_strict
+// CHECK-SAME: (float noundef [[X:%.*]]) local_unnamed_addr #[[ATTR2:[0-9]+]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[TMP0:%.*]] = tail call i1 @llvm.is.fpclass.f32(float [[X]], i32 504) #[[ATTR4:[0-9]+]]
+// CHECK-NEXT: ret i1 [[TMP0]]
+//
+_Bool check_isfpclass_finite_strict(float x) {
+#pragma STDC FENV_ACCESS ON
+ return __builtin_isfpclass(x, 504 /*Finite*/);
+}
+
+// CHECK-LABEL: define dso_local i1 @check_isfpclass_nan_f32
+// CHECK-SAME: (float noundef [[X:%.*]]) local_unnamed_addr #[[ATTR3:[0-9]+]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[TMP0:%.*]] = fcmp uno float [[X]], 0.000000e+00
+// CHECK-NEXT: ret i1 [[TMP0]]
+//
+_Bool check_isfpclass_nan_f32(float x) {
+ return __builtin_isfpclass(x, 3 /*NaN*/);
+}
+
+// CHECK-LABEL: define dso_local i1 @check_isfpclass_nan_f32_strict
+// CHECK-SAME: (float noundef [[X:%.*]]) local_unnamed_addr #[[ATTR2]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[TMP0:%.*]] = tail call i1 @llvm.is.fpclass.f32(float [[X]], i32 3) #[[ATTR4]]
+// CHECK-NEXT: ret i1 [[TMP0]]
+//
+_Bool check_isfpclass_nan_f32_strict(float x) {
+#pragma STDC FENV_ACCESS ON
+ return __builtin_isfpclass(x, 3 /*NaN*/);
+}
+
+// CHECK-LABEL: define dso_local i1 @check_isfpclass_snan_f64
+// CHECK-SAME: (double noundef [[X:%.*]]) local_unnamed_addr #[[ATTR0]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[TMP0:%.*]] = tail call i1 @llvm.is.fpclass.f64(double [[X]], i32 1)
+// CHECK-NEXT: ret i1 [[TMP0]]
+//
+_Bool check_isfpclass_snan_f64(double x) {
+ return __builtin_isfpclass(x, 1 /*SNaN*/);
+}
+
+// CHECK-LABEL: define dso_local i1 @check_isfpclass_snan_f64_strict
+// CHECK-SAME: (double noundef [[X:%.*]]) local_unnamed_addr #[[ATTR2]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[TMP0:%.*]] = tail call i1 @llvm.is.fpclass.f64(double [[X]], i32 1) #[[ATTR4]]
+// CHECK-NEXT: ret i1 [[TMP0]]
+//
+_Bool check_isfpclass_snan_f64_strict(double x) {
+#pragma STDC FENV_ACCESS ON
+ return __builtin_isfpclass(x, 1 /*NaN*/);
+}
+
+// CHECK-LABEL: define dso_local i1 @check_isfpclass_zero_f16
+// CHECK-SAME: (half noundef [[X:%.*]]) local_unnamed_addr #[[ATTR3]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[TMP0:%.*]] = fcmp oeq half [[X]], 0xH0000
+// CHECK-NEXT: ret i1 [[TMP0]]
+//
+_Bool check_isfpclass_zero_f16(_Float16 x) {
+ return __builtin_isfpclass(x, 96 /*Zero*/);
+}
+
+// CHECK-LABEL: define dso_local i1 @check_isfpclass_zero_f16_strict
+// CHECK-SAME: (half noundef [[X:%.*]]) local_unnamed_addr #[[ATTR2]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[TMP0:%.*]] = tail call i1 @llvm.is.fpclass.f16(half [[X]], i32 96) #[[ATTR4]]
+// CHECK-NEXT: ret i1 [[TMP0]]
+//
+_Bool check_isfpclass_zero_f16_strict(_Float16 x) {
+#pragma STDC FENV_ACCESS ON
+ return __builtin_isfpclass(x, 96 /*Zero*/);
+}
diff --git a/clang/test/Preprocessor/init-aarch64.c b/clang/test/Preprocessor/init-aarch64.c
index 4ef62f0e2aa8d..2b7cc57f23033 100644
--- a/clang/test/Preprocessor/init-aarch64.c
+++ b/clang/test/Preprocessor/init-aarch64.c
@@ -104,6 +104,16 @@
// AARCH64-NEXT: #define __FLT_MIN_EXP__ (-125)
// AARCH64-NEXT: #define __FLT_MIN__ 1.17549435e-38F
// AARCH64-NEXT: #define __FLT_RADIX__ 2
+// AARCH64-NEXT: #define __FPCLASS_NEGINF 0x0004
+// AARCH64-NEXT: #define __FPCLASS_NEGNORMAL 0x0008
+// AARCH64-NEXT: #define __FPCLASS_NEGSUBNORMAL 0x0010
+// AARCH64-NEXT: #define __FPCLASS_NEGZERO 0x0020
+// AARCH64-NEXT: #define __FPCLASS_POSINF 0x0200
+// AARCH64-NEXT: #define __FPCLASS_POSNORMAL 0x0100
+// AARCH64-NEXT: #define __FPCLASS_POSSUBNORMAL 0x0080
+// AARCH64-NEXT: #define __FPCLASS_POSZERO 0x0040
+// AARCH64-NEXT: #define __FPCLASS_QNAN 0x0002
+// AARCH64-NEXT: #define __FPCLASS_SNAN 0x0001
// AARCH64-NEXT: #define __FP_FAST_FMA 1
// AARCH64-NEXT: #define __FP_FAST_FMAF 1
// AARCH64-NEXT: #define __GCC_ASM_FLAG_OUTPUTS__ 1
diff --git a/clang/test/Preprocessor/init.c b/clang/test/Preprocessor/init.c
index 146e4c2237f0e..59c5122afe1e4 100644
--- a/clang/test/Preprocessor/init.c
+++ b/clang/test/Preprocessor/init.c
@@ -1605,6 +1605,16 @@
// WEBASSEMBLY-NEXT:#define __FLT_MIN_EXP__ (-125)
// WEBASSEMBLY-NEXT:#define __FLT_MIN__ 1.17549435e-38F
// WEBASSEMBLY-NEXT:#define __FLT_RADIX__ 2
+// WEBASSEMBLY-NEXT:#define __FPCLASS_NEGINF 0x0004
+// WEBASSEMBLY-NEXT:#define __FPCLASS_NEGNORMAL 0x0008
+// WEBASSEMBLY-NEXT:#define __FPCLASS_NEGSUBNORMAL 0x0010
+// WEBASSEMBLY-NEXT:#define __FPCLASS_NEGZERO 0x0020
+// WEBASSEMBLY-NEXT:#define __FPCLASS_POSINF 0x0200
+// WEBASSEMBLY-NEXT:#define __FPCLASS_POSNORMAL 0x0100
+// WEBASSEMBLY-NEXT:#define __FPCLASS_POSSUBNORMAL 0x0080
+// WEBASSEMBLY-NEXT:#define __FPCLASS_POSZERO 0x0040
+// WEBASSEMBLY-NEXT:#define __FPCLASS_QNAN 0x0002
+// WEBASSEMBLY-NEXT:#define __FPCLASS_SNAN 0x0001
// WEBASSEMBLY-NEXT:#define __GCC_ATOMIC_BOOL_LOCK_FREE 2
// WEBASSEMBLY-NEXT:#define __GCC_ATOMIC_CHAR16_T_LOCK_FREE 2
// WEBASSEMBLY-NEXT:#define __GCC_ATOMIC_CHAR32_T_LOCK_FREE 2
diff --git a/clang/test/Sema/builtins.c b/clang/test/Sema/builtins.c
index 702b40c63767f..13b6df18f6280 100644
--- a/clang/test/Sema/builtins.c
+++ b/clang/test/Sema/builtins.c
@@ -378,3 +378,14 @@ void test_builtin_complex(void) {
}
_Complex double builtin_complex_static_init = __builtin_complex(1.0, 2.0);
+
+int test_is_fpclass(float x, int mask) {
+ int x1 = __builtin_isfpclass(x, 1024); // expected-error {{argument value 1024 is outside the valid range [0, 1023]}}
+ int x2 = __builtin_isfpclass(3, 3); // expected-error{{floating point classification requires argument of floating point type (passed in 'int')}}
+ int x3 = __builtin_isfpclass(x, 3, x); // expected-error{{too many arguments to function call, expected 2, have 3}}
+ int x4 = __builtin_isfpclass(x); // expected-error{{too few arguments to function call, expected 2, have 1}}
+ int x5 = __builtin_isfpclass(x, mask); // expected-error{{argument to '__builtin_isfpclass' must be a constant integer}}
+ int x6 = __builtin_isfpclass(x, -1); // expected-error{{argument value -1 is outside the valid range [0, 1023]}}
+ float _Complex c = x;
+ int x7 = __builtin_isfpclass(c, 3); // expected-error{{floating point classification requires argument of floating point type (passed in '_Complex float')}}
+}
diff --git a/clang/test/Sema/constant-builtins-2.c b/clang/test/Sema/constant-builtins-2.c
index 4301b57aa84fc..1f4d1d3c23ade 100644
--- a/clang/test/Sema/constant-builtins-2.c
+++ b/clang/test/Sema/constant-builtins-2.c
@@ -124,6 +124,47 @@ char isnormal_inf_neg[!__builtin_isnormal(-__builtin_inf()) ? 1 : -1];
char isnormal_nan [!__builtin_isnormal(__builtin_nan("")) ? 1 : -1];
char isnormal_snan [!__builtin_isnormal(__builtin_nans("")) ? 1 : -1];
+char isfpclass_inf_pos_0[__builtin_isfpclass(__builtin_inf(), 0x0200) ? 1 : -1]; // fcPosInf
+char isfpclass_inf_pos_1[!__builtin_isfpclass(__builtin_inff(), 0x0004) ? 1 : -1]; // fcNegInf
+char isfpclass_inf_pos_2[__builtin_isfpclass(__builtin_infl(), 0x0207) ? 1 : -1]; // fcSNan|fcQNan|fcNegInf|fcPosInf
+char isfpclass_inf_pos_3[!__builtin_isfpclass(__builtin_inf(), 0x01F8) ? 1 : -1]; // fcFinite
+char isfpclass_pos_0 [__builtin_isfpclass(1.0, 0x0100) ? 1 : -1]; // fcPosNormal
+char isfpclass_pos_1 [!__builtin_isfpclass(1.0f, 0x0008) ? 1 : -1]; // fcNegNormal
+char isfpclass_pos_2 [__builtin_isfpclass(1.0L, 0x01F8) ? 1 : -1]; // fcFinite
+char isfpclass_pos_3 [!__builtin_isfpclass(1.0, 0x0003) ? 1 : -1]; // fcSNan|fcQNan
+char isfpclass_pdenorm_0[__builtin_isfpclass(1.0e-40f, 0x0080) ? 1 : -1]; // fcPosSubnormal
+char isfpclass_pdenorm_1[__builtin_isfpclass(1.0e-310, 0x01F8) ? 1 : -1]; // fcFinite
+char isfpclass_pdenorm_2[!__builtin_isfpclass(1.0e-40f, 0x003C) ? 1 : -1]; // fcNegative
+char isfpclass_pdenorm_3[!__builtin_isfpclass(1.0e-310, 0x0207) ? 1 : -1]; // ~fcFinite
+char isfpclass_pzero_0 [__builtin_isfpclass(0.0f, 0x0060) ? 1 : -1]; // fcZero
+char isfpclass_pzero_1 [__builtin_isfpclass(0.0, 0x01F8) ? 1 : -1]; // fcFinite
+char isfpclass_pzero_2 [!__builtin_isfpclass(0.0L, 0x0020) ? 1 : -1]; // fcNegZero
+char isfpclass_pzero_3 [!__builtin_isfpclass(0.0, 0x0003) ? 1 : -1]; // fcNan
+char isfpclass_nzero_0 [__builtin_isfpclass(-0.0f, 0x0060) ? 1 : -1]; // fcZero
+char isfpclass_nzero_1 [__builtin_isfpclass(-0.0, 0x01F8) ? 1 : -1]; // fcFinite
+char isfpclass_nzero_2 [!__builtin_isfpclass(-0.0L, 0x0040) ? 1 : -1]; // fcPosZero
+char isfpclass_nzero_3 [!__builtin_isfpclass(-0.0, 0x0003) ? 1 : -1]; // fcNan
+char isfpclass_ndenorm_0[__builtin_isfpclass(-1.0e-40f, 0x0010) ? 1 : -1]; // fcNegSubnormal
+char isfpclass_ndenorm_1[__builtin_isfpclass(-1.0e-310, 0x01F8) ? 1 : -1]; // fcFinite
+char isfpclass_ndenorm_2[!__builtin_isfpclass(-1.0e-40f, 0x03C0) ? 1 : -1]; // fcPositive
+char isfpclass_ndenorm_3[!__builtin_isfpclass(-1.0e-310, 0x0207) ? 1 : -1]; // ~fcFinite
+char isfpclass_neg_0 [__builtin_isfpclass(-1.0, 0x0008) ? 1 : -1]; // fcNegNormal
+char isfpclass_neg_1 [!__builtin_isfpclass(-1.0f, 0x00100) ? 1 : -1]; // fcPosNormal
+char isfpclass_neg_2 [__builtin_isfpclass(-1.0L, 0x01F8) ? 1 : -1]; // fcFinite
+char isfpclass_neg_3 [!__builtin_isfpclass(-1.0, 0x0003) ? 1 : -1]; // fcSNan|fcQNan
+char isfpclass_inf_neg_0[__builtin_isfpclass(-__builtin_inf(), 0x0004) ? 1 : -1]; // fcNegInf
+char isfpclass_inf_neg_1[!__builtin_isfpclass(-__builtin_inff(), 0x0200) ? 1 : -1]; // fcPosInf
+char isfpclass_inf_neg_2[__builtin_isfpclass(-__builtin_infl(), 0x0207) ? 1 : -1]; // ~fcFinite
+char isfpclass_inf_neg_3[!__builtin_isfpclass(-__builtin_inf(), 0x03C0) ? 1 : -1]; // fcPositive
+char isfpclass_qnan_0 [__builtin_isfpclass(__builtin_nan(""), 0x0002) ? 1 : -1]; // fcQNan
+char isfpclass_qnan_1 [!__builtin_isfpclass(__builtin_nanf(""), 0x0001) ? 1 : -1]; // fcSNan
+char isfpclass_qnan_2 [__builtin_isfpclass(__builtin_nanl(""), 0x0207) ? 1 : -1]; // ~fcFinite
+char isfpclass_qnan_3 [!__builtin_isfpclass(__builtin_nan(""), 0x01F8) ? 1 : -1]; // fcFinite
+char isfpclass_snan_0 [__builtin_isfpclass(__builtin_nansf(""), 0x0001) ? 1 : -1]; // fcSNan
+char isfpclass_snan_1 [!__builtin_isfpclass(__builtin_nans(""), 0x0002) ? 1 : -1]; // fcQNan
+char isfpclass_snan_2 [__builtin_isfpclass(__builtin_nansl(""), 0x0207) ? 1 : -1]; // ~fcFinite
+char isfpclass_snan_3 [!__builtin_isfpclass(__builtin_nans(""), 0x01F8) ? 1 : -1]; // fcFinite
+
//double g19 = __builtin_powi(2.0, 4);
//float g20 = __builtin_powif(2.0f, 4);
//long double g21 = __builtin_powil(2.0L, 4);
diff --git a/llvm/include/llvm/IR/IRBuilder.h b/llvm/include/llvm/IR/IRBuilder.h
index e607982d21da5..ebce038201d95 100644
--- a/llvm/include/llvm/IR/IRBuilder.h
+++ b/llvm/include/llvm/IR/IRBuilder.h
@@ -2528,6 +2528,8 @@ class IRBuilderBase {
unsigned Index, unsigned FieldIndex,
MDNode *DbgInfo);
+ Value *createIsFPClass(Value *FPNum, unsigned Test);
+
private:
/// Helper function that creates an assume intrinsic call that
/// represents an alignment assumption on the provided pointer \p PtrValue
diff --git a/llvm/lib/IR/IRBuilder.cpp b/llvm/lib/IR/IRBuilder.cpp
index 21f4e7ba64a87..491065dea29ff 100644
--- a/llvm/lib/IR/IRBuilder.cpp
+++ b/llvm/lib/IR/IRBuilder.cpp
@@ -1383,6 +1383,14 @@ Value *IRBuilderBase::CreatePreserveStructAccessIndex(
return Fn;
}
+Value *IRBuilderBase::createIsFPClass(Value *FPNum, unsigned Test) {
+ ConstantInt *TestV = getInt32(Test);
+ Module *M = BB->getParent()->getParent();
+ Function *FnIsFPClass =
+ Intrinsic::getDeclaration(M, Intrinsic::is_fpclass, {FPNum->getType()});
+ return CreateCall(FnIsFPClass, {FPNum, TestV});
+}
+
CallInst *IRBuilderBase::CreateAlignmentAssumptionHelper(const DataLayout &DL,
Value *PtrValue,
Value *AlignValue,
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