1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.target/i386/pr78952-1.c b/gcc/testsuite/gcc.target/i386/pr78952-1.c
new file mode 100644
index 0000000..2d2746d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr78952-1.c
@@ -0,0 +1,21 @@
+/* PR target/78952 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -masm=att" } */
+/* { dg-additional-options "-mregparm=3" { target ia32 } } */
+/* { dg-final { scan-assembler-not "movsbl" } } */
+
+struct S1
+{
+  char pad1;
+  char val;
+  short pad2;
+};
+
+struct S1 foo (struct S1 a, struct S1 b)
+{
+  a.val = b.val;
+
+  return a;
+}
+
+/* { dg-final { scan-assembler "\[ \t\]movb\[ \t\]+%.h, %.h" } } */