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[CodeGen] Mark fma as const for Android 

Summary:
r318093 sets fma, fmaf, fmal as const for Gnu and MSVC.  Android also
does not set errno for these functions.  So mark these const for
Android.

Reviewers: spatel, efriedma, srhines, chh, enh

Subscribers: cfe-commits, llvm-commits

Differential Revision: https://reviews.llvm.org/D44852

llvm-svn: 328552
This commit is contained in:
Pirama Arumuga Nainar 2018-03-26 17:03:34 +00:00
parent 86ea53123d
commit fbfba29d74
2 changed files with 8 additions and 2 deletions
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4
clang/lib/Sema/SemaDecl.cpp
View File

@ -13116,11 +13116,11 @@ void Sema::AddKnownFunctionAttributes(FunctionDecl *FD) {
Context.BuiltinInfo.isConstWithoutErrno(BuiltinID))
FD->addAttr(ConstAttr::CreateImplicit(Context, FD->getLocation()));
// We make "fma" on GNU or Windows const because we know it does not set
// We make "fma" on some platforms const because we know it does not set
// errno in those environments even though it could set errno based on the
// C standard.
const llvm::Triple &Trip = Context.getTargetInfo().getTriple();
if ((Trip.isGNUEnvironment() || Trip.isOSMSVCRT()) &&
if ((Trip.isGNUEnvironment() || Trip.isAndroid() || Trip.isOSMSVCRT()) &&
!FD->hasAttr<ConstAttr>()) {
switch (BuiltinID) {
case Builtin::BI__builtin_fma:

6
clang/test/CodeGen/math-builtins.c
View File

@ -1,6 +1,7 @@
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -w -S -o - -emit-llvm %s | FileCheck %s -check-prefix=NO__ERRNO
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -w -S -o - -emit-llvm -fmath-errno %s | FileCheck %s -check-prefix=HAS_ERRNO
// RUN: %clang_cc1 -triple x86_64-unknown-unknown-gnu -w -S -o - -emit-llvm -fmath-errno %s | FileCheck %s --check-prefix=HAS_ERRNO_GNU
// RUN: %clang_cc1 -triple x86_64-unknown-unknown-android -w -S -o - -emit-llvm -fmath-errno %s | FileCheck %s --check-prefix=HAS_ERRNO_ANDROID
// RUN: %clang_cc1 -triple x86_64-unknown-windows-msvc -w -S -o - -emit-llvm -fmath-errno %s | FileCheck %s --check-prefix=HAS_ERRNO_WIN
// Test attributes and codegen of math builtins.
@ -296,6 +297,10 @@ void foo(double *d, float f, float *fp, long double *l, int *i, const char *c) {
// HAS_ERRNO_GNU: declare float @llvm.fma.f32(float, float, float) [[READNONE_INTRINSIC]]
// HAS_ERRNO_GNU: declare x86_fp80 @llvm.fma.f80(x86_fp80, x86_fp80, x86_fp80) [[READNONE_INTRINSIC]]
// HAS_ERRNO_ANDROID: declare double @llvm.fma.f64(double, double, double) [[READNONE_INTRINSIC:#[0-9]+]]
// HAS_ERRNO_ANDROID: declare float @llvm.fma.f32(float, float, float) [[READNONE_INTRINSIC]]
// HAS_ERRNO_ANDROID: declare x86_fp80 @llvm.fma.f80(x86_fp80, x86_fp80, x86_fp80) [[READNONE_INTRINSIC]]
// HAS_ERRNO_WIN: declare double @llvm.fma.f64(double, double, double) [[READNONE_INTRINSIC:#[0-9]+]]
// HAS_ERRNO_WIN: declare float @llvm.fma.f32(float, float, float) [[READNONE_INTRINSIC]]
// Long double is just double on win, so no f80 use/declaration.
@ -582,5 +587,6 @@ void foo(double *d, float f, float *fp, long double *l, int *i, const char *c) {
// HAS_ERRNO: attributes [[READNONE]] = { {{.*}}readnone{{.*}} }
// HAS_ERRNO_GNU: attributes [[READNONE_INTRINSIC]] = { {{.*}}readnone{{.*}} }
// HAS_ERRNO_ANDROID: attributes [[READNONE_INTRINSIC]] = { {{.*}}readnone{{.*}} }
// HAS_ERRNO_WIN: attributes [[READNONE_INTRINSIC]] = { {{.*}}readnone{{.*}} }