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

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

llvm-svn: 319129

3 files changed, 17 insertions, 2 deletions

diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 15a752b354a..9f8684ddee8 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -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]>,
diff --git a/clang/lib/Basic/Targets/WebAssembly.cpp b/clang/lib/Basic/Targets/WebAssembly.cpp
index 9eaaf8d4fdc..915aad4b563 100644
--- a/clang/lib/Basic/Targets/WebAssembly.cpp
+++ b/clang/lib/Basic/Targets/WebAssembly.cpp
@@ -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";
diff --git a/clang/lib/Basic/Targets/WebAssembly.h b/clang/lib/Basic/Targets/WebAssembly.h
index 20f57506d9f..ee0073d081e 100644
--- a/clang/lib/Basic/Targets/WebAssembly.h
+++ b/clang/lib/Basic/Targets/WebAssembly.h
@@ -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);
   }