diff options
| author | Daniel Dunbar <daniel@zuster.org> | 2009-02-16 22:43:43 +0000 |
|---|---|---|
| committer | Daniel Dunbar <daniel@zuster.org> | 2009-02-16 22:43:43 +0000 |
| commit | ef2abfee3ea16ec74942dc09e9e425f46aeb2582 (patch) | |
| tree | a1fd544522e1d5e2708b9b2a6df1704a0734d0bd /Driver/clang.cpp | |
| parent | f592c929bd1f083abcc8199b24bb825fdd28df1c (diff) | |
Support IRgen of sqrt -> llvm.sqrt, pow -> llvm.pow.
- Define pow[lf]?, sqrt[lf]? as builtins.
- Add -fmath-errno option which binds to LangOptions.MathErrno
- Add new builtin flag Builtin::Context::isConstWithoutErrno for
functions which can be marked as const if errno isn't respected for
math functions. Sema automatically marks these functions as const
when they are defined, if MathErrno=0.
- IRgen uses const attribute on sqrt and pow library functions to
decide if it can use the llvm intrinsic.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64689 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'Driver/clang.cpp')
| -rw-r--r-- | Driver/clang.cpp | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/Driver/clang.cpp b/Driver/clang.cpp index d1ef871d6a..d0b3dafb31 100644 --- a/Driver/clang.cpp +++ b/Driver/clang.cpp @@ -213,9 +213,14 @@ InheritanceViewCls("cxx-inheritance-view", //===----------------------------------------------------------------------===// static llvm::cl::opt<bool> Freestanding("ffreestanding", - llvm::cl::desc("Assert that the compiler takes place in a " + llvm::cl::desc("Assert that the compilation takes place in a " "freestanding environment")); +static llvm::cl::opt<bool> +MathErrno("fmath-errno", + llvm::cl::desc("Require math functions to respect errno."), + llvm::cl::init(true)); + //===----------------------------------------------------------------------===// // Analyzer Options. //===----------------------------------------------------------------------===// @@ -647,6 +652,8 @@ static void InitializeLanguageStandard(LangOptions &Options, LangKind LK, if (Freestanding) Options.Freestanding = 1; + Options.MathErrno = MathErrno; + // Override the default runtime if the user requested it. if (NeXTRuntime) Options.NeXTRuntime = 1; @@ -1238,8 +1245,7 @@ static void ParseFile(Preprocessor &PP, MinimalAction *PA) { //===----------------------------------------------------------------------===// static llvm::cl::opt<bool> -OptSize("Os", - llvm::cl::desc("Optimize for size")); +OptSize("Os", llvm::cl::desc("Optimize for size")); // It might be nice to add bounds to the CommandLine library directly. struct OptLevelParser : public llvm::cl::parser<unsigned> { |