[Bug target/31568] ICE with invalid %y operand (inline-asm)

["pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #2 from pinskia at gcc dot gnu dot org  2008-07-14 12:43 -------
Testing this patch right now:
Index: testsuite/gcc.target/powerpc/asm-y.c
===================================================================
--- testsuite/gcc.target/powerpc/asm-y.c        (revision 0)
+++ testsuite/gcc.target/powerpc/asm-y.c        (revision 0)
@@ -0,0 +1,11 @@
+/* { dg-do compile } */
+/* { dg-options "-O1" } */
+
+/* Test that %yN does not cause an internal error if used incorrectly.  */
+
+int f(int *a)
+{
+  asm ("#%y0" : "=m"(a[2])); /* { dg-error "try using the 'Z' constraint" } */
+  asm ("#%y0" : "=m"(a[1])); /* { dg-error "try using the 'Z' constraint" } */
+  asm ("#%y0" : "=m"(a[0]));
+}
Index: config/rs6000/rs6000.c
===================================================================
--- config/rs6000/rs6000.c      (revision 137784)
+++ config/rs6000/rs6000.c      (working copy)
@@ -12288,9 +12288,13 @@ print_operand (FILE *file, rtx x, int co
          fprintf (file, "0,%s", reg_names[REGNO (tmp)]);
        else
          {
-           gcc_assert (GET_CODE (tmp) == PLUS
-                       && REG_P (XEXP (tmp, 0))
-                       && REG_P (XEXP (tmp, 1)));
+           if (!GET_CODE (tmp) == PLUS
+               || !REG_P (XEXP (tmp, 0))
+               || !REG_P (XEXP (tmp, 1)))
+             {
+               output_operand_lossage ("invalid %%y value, try using the 'Z'
constraint");
+               break;
+             }

            if (REGNO (XEXP (tmp, 0)) == 0)
              fprintf (file, "%s,%s", reg_names[ REGNO (XEXP (tmp, 1)) ],


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31568