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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/107385] [asm goto] "=r" vs "+r" for outputs along
 indirect edges
Date: Thu, 15 Feb 2024 13:07:44 +0000
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X-Bugzilla-Component: middle-end
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X-Bugzilla-Keywords: inline-asm, wrong-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107385

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So
2024-02-15  Jakub Jelinek  <jakub@redhat.com>

        PR middle-end/107385
        * gcc.dg/pr107385.c: New test.

--- gcc/testsuite/gcc.dg/pr107385.c.jj  2024-01-13 00:05:00.077372302 +0100
+++ gcc/testsuite/gcc.dg/pr107385.c     2024-02-15 09:18:47.711260427 +0100
@@ -0,0 +1,20 @@
+/* PR middle-end/107385 */
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+__attribute__((noipa)) int
+foo (void)
+{
+  int x;
+  asm goto ("": "=3Dr" (x) : "0" (15) :: lab);
+  x =3D 6;
+lab:
+  return x;
+}
+
+int
+main ()
+{
+  if (foo () !=3D 6)
+    __builtin_abort ();
+}=