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[WebAssembly] Add options for using the nontrapping-fptoint feature.

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This adds ways to control use of WebAssembly's new nontrapping-fptoint
feature.

llvm-svn: 319129
This commit is contained in:
Dan Gohman 2017-11-28 01:13:45 +00:00
parent cdd48b8a6b
commit 0811cd1d15
3 changed files with 17 additions and 2 deletions
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2
clang/include/clang/Driver/Options.td
View File

@ -1837,6 +1837,8 @@ def ffixed_x18 : Flag<["-"], "ffixed-x18">, Group<m_aarch64_Features_Group>,
def msimd128 : Flag<["-"], "msimd128">, Group<m_wasm_Features_Group>;
def mno_simd128 : Flag<["-"], "mno-simd128">, Group<m_wasm_Features_Group>;
def mnontrapping_fptoint : Flag<["-"], "mnontrapping-fptoint">, Group<m_wasm_Features_Group>;
def mno_nontrapping_fptoint : Flag<["-"], "mno-nontrapping-fptoint">, Group<m_wasm_Features_Group>;
def mamdgpu_debugger_abi : Joined<["-"], "mamdgpu-debugger-abi=">,
Flags<[HelpHidden]>,

9
clang/lib/Basic/Targets/WebAssembly.cpp
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@ -32,6 +32,7 @@ const Builtin::Info WebAssemblyTargetInfo::BuiltinInfo[] = {
bool WebAssemblyTargetInfo::hasFeature(StringRef Feature) const {
return llvm::StringSwitch<bool>(Feature)
.Case("simd128", SIMDLevel >= SIMD128)
.Case("nontrapping-fptoint", HasNontrappingFPToInt)
.Default(false);
}
@ -61,6 +62,14 @@ bool WebAssemblyTargetInfo::handleTargetFeatures(
SIMDLevel = std::min(SIMDLevel, SIMDEnum(SIMD128 - 1));
continue;
}
if (Feature == "+nontrapping-fptoint") {
HasNontrappingFPToInt = true;
continue;
}
if (Feature == "-nontrapping-fptoint") {
HasNontrappingFPToInt = false;
continue;
}
Diags.Report(diag::err_opt_not_valid_with_opt)
<< Feature << "-target-feature";

8
clang/lib/Basic/Targets/WebAssembly.h
View File

@ -30,9 +30,11 @@ class LLVM_LIBRARY_VISIBILITY WebAssemblyTargetInfo : public TargetInfo {
SIMD128,
} SIMDLevel;
bool HasNontrappingFPToInt;
public:
explicit WebAssemblyTargetInfo(const llvm::Triple &T, const TargetOptions &)
: TargetInfo(T), SIMDLevel(NoSIMD) {
: TargetInfo(T), SIMDLevel(NoSIMD), HasNontrappingFPToInt(false) {
NoAsmVariants = true;
SuitableAlign = 128;
LargeArrayMinWidth = 128;
@ -55,8 +57,10 @@ private:
initFeatureMap(llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags,
StringRef CPU,
const std::vector<std::string> &FeaturesVec) const override {
if (CPU == "bleeding-edge")
if (CPU == "bleeding-edge") {
Features["simd128"] = true;
Features["nontrapping-fptoint"] = true;
}
return TargetInfo::initFeatureMap(Features, Diags, CPU, FeaturesVec);
}