[WebAssembly] Add bulk memory target feature

Summary: Also clean up some preexisting target feature code.

Reviewers: aheejin

Subscribers: dschuff, sbc100, jgravelle-google, hiraditya, sunfish, jfb

Differential Revision: https://reviews.llvm.org/D57495

llvm-svn: 352793

2 files changed, 24 insertions, 5 deletions

diff --git a/clang/lib/Basic/Targets/WebAssembly.cpp b/clang/lib/Basic/Targets/WebAssembly.cpp
index 7e6a113868c..48edaded512 100644
--- a/clang/lib/Basic/Targets/WebAssembly.cpp
+++ b/clang/lib/Basic/Targets/WebAssembly.cpp
@@ -40,6 +40,7 @@ bool WebAssemblyTargetInfo::hasFeature(StringRef Feature) const {
       .Case("nontrapping-fptoint", HasNontrappingFPToInt)
       .Case("sign-ext", HasSignExt)
       .Case("exception-handling", HasExceptionHandling)
+      .Case("bulk-memory", HasBulkMemory)
       .Default(false);
 }
 
@@ -59,6 +60,14 @@ void WebAssemblyTargetInfo::getTargetDefines(const LangOptions &Opts,
     Builder.defineMacro("__wasm_simd128__");
   if (SIMDLevel >= UnimplementedSIMD128)
     Builder.defineMacro("__wasm_unimplemented_simd128__");
+  if (HasNontrappingFPToInt)
+    Builder.defineMacro("__wasm_nontrapping_fptoint__");
+  if (HasSignExt)
+    Builder.defineMacro("__wasm_sign_ext__");
+  if (HasExceptionHandling)
+    Builder.defineMacro("__wasm_exception_handling__");
+  if (HasBulkMemory)
+    Builder.defineMacro("__wasm_bulk_memory__");
 }
 
 void WebAssemblyTargetInfo::setSIMDLevel(llvm::StringMap<bool> &Features,
@@ -93,6 +102,8 @@ bool WebAssemblyTargetInfo::initFeatureMap(
     Features["sign-ext"] = true;
   if (HasExceptionHandling)
     Features["exception-handling"] = true;
+  if (HasBulkMemory)
+    Features["bulk-memory"] = true;
 
   return TargetInfo::initFeatureMap(Features, Diags, CPU, FeaturesVec);
 }
@@ -140,6 +151,14 @@ bool WebAssemblyTargetInfo::handleTargetFeatures(
       HasExceptionHandling = false;
       continue;
     }
+    if (Feature == "+bulk-memory") {
+      HasBulkMemory = true;
+      continue;
+    }
+    if (Feature == "-bulk-memory") {
+      HasBulkMemory = 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 b1723505348..1d41f2011bb 100644
--- a/clang/lib/Basic/Targets/WebAssembly.h
+++ b/clang/lib/Basic/Targets/WebAssembly.h
@@ -30,14 +30,14 @@ class LLVM_LIBRARY_VISIBILITY WebAssemblyTargetInfo : public TargetInfo {
     UnimplementedSIMD128,
   } SIMDLevel = NoSIMD;
 
-  bool HasNontrappingFPToInt;
-  bool HasSignExt;
-  bool HasExceptionHandling;
+  bool HasNontrappingFPToInt = false;
+  bool HasSignExt = false;
+  bool HasExceptionHandling = false;
+  bool HasBulkMemory = false;
 
 public:
   explicit WebAssemblyTargetInfo(const llvm::Triple &T, const TargetOptions &)
-      : TargetInfo(T), SIMDLevel(NoSIMD), HasNontrappingFPToInt(false),
-        HasSignExt(false), HasExceptionHandling(false) {
+      : TargetInfo(T) {
     NoAsmVariants = true;
     SuitableAlign = 128;
     LargeArrayMinWidth = 128;