commit 318a6eae06dd9fe031d3ebed0870460e3b911b02
author Oren Ben Simhon <oren.ben.simhon@intel.com> Thu Apr 27 12:01:00 2017 +0000
committer Oren Ben Simhon <oren.ben.simhon@intel.com> Thu Apr 27 12:01:00 2017 +0000
tree 20bbb483a66384595167c995561545898ed53856
parent f57453aece3e1dc56ce00a29ec6612d33e521c88

[X86] Support of no_caller_saved_registers attribute

Implements the Clang part for no_caller_saved_registers attribute as appears here: 
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=5ed3cc7b66af4758f7849ed6f65f4365be8223be.

Differential Revision: https://reviews.llvm.org/D31871

llvm-svn: 301535

clang/lib/CodeGen/CGCall.cpp

diff --git a/clang/lib/CodeGen/CGCall.cpp b/clang/lib/CodeGen/CGCall.cpp
index 2623525..a5c43fb 100644
--- a/clang/lib/CodeGen/CGCall.cpp
+++ b/clang/lib/CodeGen/CGCall.cpp
@@ -788,6 +788,7 @@
   FI->ChainCall = chainCall;
   FI->NoReturn = info.getNoReturn();
   FI->ReturnsRetained = info.getProducesResult();
+  FI->NoCallerSavedRegs = info.getNoCallerSavedRegs();
   FI->Required = required;
   FI->HasRegParm = info.getHasRegParm();
   FI->RegParm = info.getRegParm();
@@ -1816,6 +1817,8 @@
       RetAttrs.addAttribute(llvm::Attribute::NoAlias);
     if (TargetDecl->hasAttr<ReturnsNonNullAttr>())
       RetAttrs.addAttribute(llvm::Attribute::NonNull);
+    if (TargetDecl->hasAttr<AnyX86NoCallerSavedRegistersAttr>())
+      FuncAttrs.addAttribute("no_caller_saved_registers");
 
     HasOptnone = TargetDecl->hasAttr<OptimizeNoneAttr>();
     if (auto *AllocSize = TargetDecl->getAttr<AllocSizeAttr>()) {