Additional fix for PR14269: Crash on vector elements / global register vars in inline assembler.

Compiler crashed when vector elements / global register vars were used in inline assembler with "m" restriction. This patch fixes this.

Differential Revision: http://reviews.llvm.org/D10476

llvm-svn: 243870

1 files changed, 12 insertions, 0 deletions

diff --git a/clang/lib/AST/Expr.cpp b/clang/lib/AST/Expr.cpp
index 4882f536d52..89f47f980c9 100644
--- a/clang/lib/AST/Expr.cpp
+++ b/clang/lib/AST/Expr.cpp
@@ -3437,6 +3437,18 @@ bool Expr::refersToVectorElement() const {
   return false;
 }
 
+bool Expr::refersToGlobalRegisterVar() const {
+  const Expr *E = this->IgnoreParenImpCasts();
+
+  if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
+    if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
+      if (VD->getStorageClass() == SC_Register &&
+          VD->hasAttr<AsmLabelAttr>() && !VD->isLocalVarDecl())
+        return true;
+
+  return false;
+}
+
 /// isArrow - Return true if the base expression is a pointer to vector,
 /// return false if the base expression is a vector.
 bool ExtVectorElementExpr::isArrow() const {