Add a -fno-math-builtin option to the Clang -cc1
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186899 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/Builtins.cpp b/lib/Basic/Builtins.cpp
index d8aaa6e..e5775b6 100644
--- a/lib/Basic/Builtins.cpp
+++ b/lib/Basic/Builtins.cpp
@@ -16,6 +16,7 @@
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/TargetInfo.h"
#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
using namespace clang;
static const Builtin::Info BuiltinInfo[] = {
@@ -44,6 +45,21 @@
Target.getTargetBuiltins(TSRecords, NumTSRecords);
}
+bool Builtin::Context::BuiltinIsSupported(const Builtin::Info &BuiltinInfo,
+ const LangOptions &LangOpts) {
+ bool BuiltinsUnsupported = LangOpts.NoBuiltin &&
+ strchr(BuiltinInfo.Attributes, 'f');
+ bool MathBuiltinsUnsupported =
+ LangOpts.NoMathBuiltin && BuiltinInfo.HeaderName &&
+ llvm::StringRef(BuiltinInfo.HeaderName).equals("math.h");
+ bool GnuModeUnsupported = !LangOpts.GNUMode &&
+ (BuiltinInfo.builtin_lang & GNU_LANG);
+ bool ObjCUnsupported = !LangOpts.ObjC1 &&
+ BuiltinInfo.builtin_lang == OBJC_LANG;
+ return !BuiltinsUnsupported && !MathBuiltinsUnsupported &&
+ !GnuModeUnsupported && !ObjCUnsupported;
+}
+
/// InitializeBuiltins - Mark the identifiers for all the builtins with their
/// appropriate builtin ID # and mark any non-portable builtin identifiers as
/// such.
@@ -51,10 +67,9 @@
const LangOptions& LangOpts) {
// Step #1: mark all target-independent builtins with their ID's.
for (unsigned i = Builtin::NotBuiltin+1; i != Builtin::FirstTSBuiltin; ++i)
- if ((!LangOpts.NoBuiltin || !strchr(BuiltinInfo[i].Attributes, 'f')) &&
- (LangOpts.GNUMode || !(BuiltinInfo[i].builtin_lang & GNU_LANG)) &&
- (LangOpts.ObjC1 || BuiltinInfo[i].builtin_lang != OBJC_LANG))
+ if (BuiltinIsSupported(BuiltinInfo[i], LangOpts)) {
Table.get(BuiltinInfo[i].Name).setBuiltinID(i);
+ }
// Step #2: Register target-specific builtins.
for (unsigned i = 0, e = NumTSRecords; i != e; ++i)