[X86] Add NumRegisterParameters Module Flag.

Reviewers: rnk, mkuper

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D27051

llvm-svn: 298177

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index a3920e1add4..d6b0d38633c 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -159,6 +159,12 @@ CodeGenModule::CodeGenModule(ASTContext &C, const HeaderSearchOptions &HSO,
   // CoverageMappingModuleGen object.
   if (CodeGenOpts.CoverageMapping)
     CoverageMapping.reset(new CoverageMappingModuleGen(*this, *CoverageInfo));
+
+  // Record mregparm value now so it is visible through rest of codegen.
+  if (Context.getTargetInfo().getTriple().getArch() == llvm::Triple::x86)
+    getModule().addModuleFlag(llvm::Module::Error, "NumRegisterParameters",
+                              CodeGenOpts.NumRegisterParameters);
+
 }
 
 CodeGenModule::~CodeGenModule() {}
@@ -416,6 +422,7 @@ void CodeGenModule::Release() {
       (Context.getLangOpts().Modules || !LinkerOptionsMetadata.empty())) {
     EmitModuleLinkOptions();
   }
+
   if (CodeGenOpts.DwarfVersion) {
     // We actually want the latest version when there are conflicts.
     // We can change from Warning to Latest if such mode is supported.