From: Bob Wilson <bob.wilson@apple.com>
Date: Tue, 25 Sep 2012 16:30:16 +0000 (+0000)
Subject: Examine the last, not the first, instruction from the MC matcher.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=317d8f339c2ee7b59e0e8cc81646ef664e20532d;p=clang

Examine the last, not the first, instruction from the MC matcher.

If an MS-style inline asm is matched to multiple instructions, e.g., with a
a WAIT-prefix, then we need to examine the operands of the last instruction
instruction, not the prefix instruction.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164608 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Sema/SemaStmtAsm.cpp b/lib/Sema/SemaStmtAsm.cpp
index 922777e07d..792a91332e 100644
--- a/lib/Sema/SemaStmtAsm.cpp
+++ b/lib/Sema/SemaStmtAsm.cpp
@@ -567,7 +567,7 @@ StmtResult Sema::ActOnMSAsmStmt(SourceLocation AsmLoc, SourceLocation LBraceLoc,
     if (HadError) { DEF_SIMPLE_MSASM(EmptyAsmStr); return Owned(NS); }
 
     // Get the instruction descriptor.
-    llvm::MCInst Inst = Instrs[0];
+    llvm::MCInst Inst = Instrs.back();
     const llvm::MCInstrInfo *MII = TheTarget->createMCInstrInfo();
     const llvm::MCInstrDesc &Desc = MII->get(Inst.getOpcode());
     llvm::MCInstPrinter *IP =