Fix for PR3800: make sure not to evaluate the expression for a read-write
asm operand twice.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@108489 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/asm-inout.c b/test/CodeGen/asm-inout.c
new file mode 100644
index 0000000..f042766
--- /dev/null
+++ b/test/CodeGen/asm-inout.c
@@ -0,0 +1,19 @@
+// RUN: %clang_cc1 -triple i386-unknown-unknown -emit-llvm %s -o - | FileCheck %s
+// PR3800
+int *foo(void);
+
+// CHECK: @test1
+void test1() {
+ // CHECK: [[REGCALLRESULT:%[a-zA-Z0-9\.]+]] = call i32* @foo()
+ // CHECK: call void asm "foobar", "=*m,*m,~{dirflag},~{fpsr},~{flags}"(i32* [[REGCALLRESULT]], i32* [[REGCALLRESULT]])
+ asm ("foobar" : "+m"(*foo()));
+}
+
+// CHECK: @test2
+void test2() {
+ // CHECK: [[REGCALLRESULT:%[a-zA-Z0-9\.]+]] = call i32* @foo()
+ // CHECK: load i32* [[REGCALLRESULT]]
+ // CHECK: call i32 asm
+ // CHECK: store i32 {{%[a-zA-Z0-9\.]+}}, i32* [[REGCALLRESULT]]
+ asm ("foobar" : "+r"(*foo()));
+}