From: Mike Stump <mrs@apple.com>
Date: Mon, 4 Jan 2010 23:01:10 +0000 (+0000)
Subject: Avoid warnings for functions that return a value using MS-style inline
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=1cd95e210b1b084ee275e0dfa9dd8a7e65b577d7;p=clang

Avoid warnings for functions that return a value using MS-style inline
assembly code.  This avoids changing the bahvior when normal asm("")
statements are used.

The type of code affected would be:

  void* t4(void) { __asm mov eax, fs:[0x10] }

I hope people like this version, if not, let me know.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92531 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index 30f9040000..a15c5fea21 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -1345,6 +1345,14 @@ Sema::ControlFlowKind Sema::CheckFallThrough(Stmt *Root) {
       HasFakeEdge = true;
       continue;
     }
+    if (const AsmStmt *AS = dyn_cast<AsmStmt>(S)) {
+      if (AS->isMSAsm()) {
+        HasFakeEdge = true;
+        HasLiveReturn = true;
+        continue;
+      }
+    }
+
     bool NoReturnEdge = false;
     if (CallExpr *C = dyn_cast<CallExpr>(S)) {
       Expr *CEE = C->getCallee()->IgnoreParenCasts();
diff --git a/test/Sema/ms-fuzzy-asm.c b/test/Sema/ms-fuzzy-asm.c
index 9ace656934..250e322256 100644
--- a/test/Sema/ms-fuzzy-asm.c
+++ b/test/Sema/ms-fuzzy-asm.c
@@ -1,5 +1,4 @@
 // RUN: %clang_cc1 %s -verify -fms-extensions
-// XFAIL: *
 
 #define M __asm int 0x2c
 #define M2 int