Don't evaluate inout constraints twice. Fixes PR3800.

llvm-svn: 77854

2 files changed, 10 insertions, 2 deletions

diff --git a/clang/lib/CodeGen/CGStmt.cpp b/clang/lib/CodeGen/CGStmt.cpp
index 5b17b7b9008..2361c4a3342 100644
--- a/clang/lib/CodeGen/CGStmt.cpp
+++ b/clang/lib/CodeGen/CGStmt.cpp
@@ -917,8 +917,8 @@ void CodeGenFunction::EmitAsmStmt(const AsmStmt &S) {
       else
         InOutConstraints += OutputConstraint;
 
-      InOutArgTypes.push_back(Arg->getType());
-      InOutArgs.push_back(Arg);
+      InOutArgTypes.push_back(Dest.getAddress()->getType());
+      InOutArgs.push_back(Dest.getAddress());
     }
   }
   
diff --git a/clang/test/CodeGen/asm-inout.c b/clang/test/CodeGen/asm-inout.c
new file mode 100644
index 00000000000..e0e42a319df
--- /dev/null
+++ b/clang/test/CodeGen/asm-inout.c
@@ -0,0 +1,8 @@
+// RUN: clang-cc -triple i386-unknown-unknown -emit-llvm %s -o %t &&
+// RUN: grep "load i8\*\*\* %p.addr"  %t | count 1
+
+// PR3800
+void f(void **p)
+{
+    __asm__ volatile("" :"+m"(*p));
+}