r278155 - [OpenCL] Handle -cl-fp32-correctly-rounded-divide-sqrt
Yaxun Liu via cfe-commits
cfe-commits at lists.llvm.org
Tue Aug 9 13:10:18 PDT 2016
Author: yaxunl
Date: Tue Aug 9 15:10:18 2016
New Revision: 278155
URL: http://llvm.org/viewvc/llvm-project?rev=278155&view=rev
Log:
[OpenCL] Handle -cl-fp32-correctly-rounded-divide-sqrt
Let the driver pass the option to frontend. Do not set precision metadata for division instructions when this option is set. Set function attribute "correctly-rounded-divide-sqrt-fp-math" based on this option.
Differential Revision: https://reviews.llvm.org/D22940
Modified:
cfe/trunk/include/clang/Driver/Options.td
cfe/trunk/include/clang/Frontend/CodeGenOptions.def
cfe/trunk/lib/CodeGen/CGCall.cpp
cfe/trunk/lib/CodeGen/CGExprScalar.cpp
cfe/trunk/lib/Driver/Tools.cpp
cfe/trunk/lib/Frontend/CompilerInvocation.cpp
cfe/trunk/test/CodeGenOpenCL/fpmath.cl
cfe/trunk/test/Driver/opencl.cl
Modified: cfe/trunk/include/clang/Driver/Options.td
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Options.td?rev=278155&r1=278154&r2=278155&view=diff
==============================================================================
--- cfe/trunk/include/clang/Driver/Options.td (original)
+++ cfe/trunk/include/clang/Driver/Options.td Tue Aug 9 15:10:18 2016
@@ -389,6 +389,8 @@ def cl_std_EQ : Joined<["-"], "cl-std=">
HelpText<"OpenCL language standard to compile for.">;
def cl_denorms_are_zero : Flag<["-"], "cl-denorms-are-zero">, Group<opencl_Group>, Flags<[CC1Option]>,
HelpText<"OpenCL only. Allow denormals to be flushed to zero.">;
+def cl_fp32_correctly_rounded_divide_sqrt : Flag<["-"], "cl-fp32-correctly-rounded-divide-sqrt">, Group<opencl_Group>, Flags<[CC1Option]>,
+ HelpText<"OpenCL only. Specify that single precision floating-point divide and sqrt used in the program source are correctly rounded.">;
def client__name : JoinedOrSeparate<["-"], "client_name">;
def combine : Flag<["-", "--"], "combine">, Flags<[DriverOption, Unsupported]>;
def compatibility__version : JoinedOrSeparate<["-"], "compatibility_version">;
Modified: cfe/trunk/include/clang/Frontend/CodeGenOptions.def
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Frontend/CodeGenOptions.def?rev=278155&r1=278154&r2=278155&view=diff
==============================================================================
--- cfe/trunk/include/clang/Frontend/CodeGenOptions.def (original)
+++ cfe/trunk/include/clang/Frontend/CodeGenOptions.def Tue Aug 9 15:10:18 2016
@@ -111,6 +111,7 @@ CODEGENOPT(NoInline , 1, 0) ///
///< Disables use of the inline keyword.
CODEGENOPT(NoNaNsFPMath , 1, 0) ///< Assume FP arguments, results not NaN.
CODEGENOPT(FlushDenorm , 1, 0) ///< Allow FP denorm numbers to be flushed to zero
+CODEGENOPT(CorrectlyRoundedDivSqrt, 1, 0) ///< -cl-fp32-correctly-rounded-divide-sqrt
CODEGENOPT(NoZeroInitializedInBSS , 1, 0) ///< -fno-zero-initialized-in-bss.
/// \brief Method of Objective-C dispatch to use.
ENUM_CODEGENOPT(ObjCDispatchMethod, ObjCDispatchMethodKind, 2, Legacy)
Modified: cfe/trunk/lib/CodeGen/CGCall.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGCall.cpp?rev=278155&r1=278154&r2=278155&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGCall.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGCall.cpp Tue Aug 9 15:10:18 2016
@@ -1734,6 +1734,9 @@ void CodeGenModule::ConstructAttributeLi
llvm::utostr(CodeGenOpts.SSPBufferSize));
FuncAttrs.addAttribute("no-signed-zeros-fp-math",
llvm::toStringRef(CodeGenOpts.NoSignedZeros));
+ FuncAttrs.addAttribute(
+ "correctly-rounded-divide-sqrt-fp-math",
+ llvm::toStringRef(CodeGenOpts.CorrectlyRoundedDivSqrt));
if (CodeGenOpts.StackRealignment)
FuncAttrs.addAttribute("stackrealign");
Modified: cfe/trunk/lib/CodeGen/CGExprScalar.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExprScalar.cpp?rev=278155&r1=278154&r2=278155&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGExprScalar.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGExprScalar.cpp Tue Aug 9 15:10:18 2016
@@ -2276,8 +2276,13 @@ Value *ScalarExprEmitter::EmitDiv(const
if (Ops.LHS->getType()->isFPOrFPVectorTy()) {
llvm::Value *Val = Builder.CreateFDiv(Ops.LHS, Ops.RHS, "div");
- if (CGF.getLangOpts().OpenCL) {
- // OpenCL 1.1 7.4: minimum accuracy of single precision / is 2.5ulp
+ if (CGF.getLangOpts().OpenCL &&
+ !CGF.CGM.getCodeGenOpts().CorrectlyRoundedDivSqrt) {
+ // OpenCL v1.1 s7.4: minimum accuracy of single precision / is 2.5ulp
+ // OpenCL v1.2 s5.6.4.2: The -cl-fp32-correctly-rounded-divide-sqrt
+ // build option allows an application to specify that single precision
+ // floating-point divide (x/y and 1/x) and sqrt used in the program
+ // source are correctly rounded.
llvm::Type *ValTy = Val->getType();
if (ValTy->isFloatTy() ||
(isa<llvm::VectorType>(ValTy) &&
Modified: cfe/trunk/lib/Driver/Tools.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.cpp?rev=278155&r1=278154&r2=278155&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/Tools.cpp (original)
+++ cfe/trunk/lib/Driver/Tools.cpp Tue Aug 9 15:10:18 2016
@@ -5282,6 +5282,9 @@ void Clang::ConstructJob(Compilation &C,
if (Args.getLastArg(options::OPT_cl_denorms_are_zero)) {
CmdArgs.push_back("-cl-denorms-are-zero");
}
+ if (Args.getLastArg(options::OPT_cl_fp32_correctly_rounded_divide_sqrt)) {
+ CmdArgs.push_back("-cl-fp32-correctly-rounded-divide-sqrt");
+ }
// Forward -f options with positive and negative forms; we translate
// these by hand.
Modified: cfe/trunk/lib/Frontend/CompilerInvocation.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/CompilerInvocation.cpp?rev=278155&r1=278154&r2=278155&view=diff
==============================================================================
--- cfe/trunk/lib/Frontend/CompilerInvocation.cpp (original)
+++ cfe/trunk/lib/Frontend/CompilerInvocation.cpp Tue Aug 9 15:10:18 2016
@@ -572,6 +572,8 @@ static bool ParseCodeGenArgs(CodeGenOpti
Opts.NoSignedZeros = (Args.hasArg(OPT_fno_signed_zeros) ||
Args.hasArg(OPT_cl_no_signed_zeros));
Opts.FlushDenorm = Args.hasArg(OPT_cl_denorms_are_zero);
+ Opts.CorrectlyRoundedDivSqrt =
+ Args.hasArg(OPT_cl_fp32_correctly_rounded_divide_sqrt);
Opts.ReciprocalMath = Args.hasArg(OPT_freciprocal_math);
Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
Modified: cfe/trunk/test/CodeGenOpenCL/fpmath.cl
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenOpenCL/fpmath.cl?rev=278155&r1=278154&r2=278155&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenOpenCL/fpmath.cl (original)
+++ cfe/trunk/test/CodeGenOpenCL/fpmath.cl Tue Aug 9 15:10:18 2016
@@ -1,16 +1,23 @@
-// RUN: %clang_cc1 %s -emit-llvm -o - -triple spir-unknown-unknown | FileCheck %s
+// RUN: %clang_cc1 %s -emit-llvm -o - -triple spir-unknown-unknown | FileCheck --check-prefix=CHECK --check-prefix=NODIVOPT %s
+// RUN: %clang_cc1 %s -emit-llvm -o - -triple spir-unknown-unknown -cl-fp32-correctly-rounded-divide-sqrt | FileCheck --check-prefix=CHECK --check-prefix=DIVOPT %s
typedef __attribute__(( ext_vector_type(4) )) float float4;
float spscalardiv(float a, float b) {
// CHECK: @spscalardiv
- // CHECK: fdiv{{.*}}, !fpmath ![[MD:[0-9]+]]
+ // CHECK: #[[ATTR:[0-9]+]]
+ // CHECK: fdiv{{.*}},
+ // NODIVOPT: !fpmath ![[MD:[0-9]+]]
+ // DIVOPT-NOT: !fpmath ![[MD:[0-9]+]]
return a / b;
}
float4 spvectordiv(float4 a, float4 b) {
// CHECK: @spvectordiv
- // CHECK: fdiv{{.*}}, !fpmath ![[MD]]
+ // CHECK: #[[ATTR]]
+ // CHECK: fdiv{{.*}},
+ // NODIVOPT: !fpmath ![[MD]]
+ // DIVOPT-NOT: !fpmath ![[MD]]
return a / b;
}
@@ -18,8 +25,13 @@ float4 spvectordiv(float4 a, float4 b) {
double dpscalardiv(double a, double b) {
// CHECK: @dpscalardiv
+ // CHECK: #[[ATTR]]
// CHECK-NOT: !fpmath
return a / b;
}
-// CHECK: ![[MD]] = !{float 2.500000e+00}
+// CHECK: attributes #[[ATTR]] = {
+// NODIVOPT: "correctly-rounded-divide-sqrt-fp-math"="false"
+// DIVOPT: "correctly-rounded-divide-sqrt-fp-math"="true"
+// CHECK: }
+// NODIVOPT: ![[MD]] = !{float 2.500000e+00}
Modified: cfe/trunk/test/Driver/opencl.cl
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/opencl.cl?rev=278155&r1=278154&r2=278155&view=diff
==============================================================================
--- cfe/trunk/test/Driver/opencl.cl (original)
+++ cfe/trunk/test/Driver/opencl.cl Tue Aug 9 15:10:18 2016
@@ -12,6 +12,7 @@
// RUN: %clang -S -### -cl-mad-enable %s 2>&1 | FileCheck --check-prefix=CHECK-MAD-ENABLE %s
// RUN: %clang -S -### -cl-no-signed-zeros %s 2>&1 | FileCheck --check-prefix=CHECK-NO-SIGNED-ZEROS %s
// RUN: %clang -S -### -cl-denorms-are-zero %s 2>&1 | FileCheck --check-prefix=CHECK-DENORMS-ARE-ZERO %s
+// RUN: %clang -S -### -cl-fp32-correctly-rounded-divide-sqrt %s 2>&1 | FileCheck --check-prefix=CHECK-ROUND-DIV %s
// RUN: not %clang -cl-std=c99 -DOPENCL %s 2>&1 | FileCheck --check-prefix=CHECK-C99 %s
// RUN: not %clang -cl-std=invalid -DOPENCL %s 2>&1 | FileCheck --check-prefix=CHECK-INVALID %s
@@ -29,6 +30,7 @@
// CHECK-MAD-ENABLE: "-cc1" {{.*}} "-cl-mad-enable"
// CHECK-NO-SIGNED-ZEROS: "-cc1" {{.*}} "-cl-no-signed-zeros"
// CHECK-DENORMS-ARE-ZERO: "-cc1" {{.*}} "-cl-denorms-are-zero"
+// CHECK-ROUND-DIV: "-cc1" {{.*}} "-cl-fp32-correctly-rounded-divide-sqrt"
// CHECK-C99: error: invalid value 'c99' in '-cl-std=c99'
// CHECK-INVALID: error: invalid value 'invalid' in '-cl-std=invalid'
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