i386.c (print_reg): Error out for values of 8-bit size in invalid integer register.

	* config/i386/i386.c (print_reg): Error out for values
	of 8-bit size in invalid integer register.

testsuite/ChangeLog:

	* gcc.target/i386/invsize-1.c: New test.

From-SVN: r245785

gcc/ChangeLog

+2017-02-28  Uros Bizjak  <ubizjak@gmail.com>
+
+	* config/i386/i386.c (print_reg): Error out for values
+	of 8-bit size in invalid integer register.
+
 2017-02-28  Martin Sebor  <msebor@redhat.com>
 
 	PR tree-optimization/79691

gcc/config/i386/i386.c

@@ -17660,6 +17660,8 @@ print_reg (rtx x, int code, FILE *file)
     case 1:
       if (regno >= ARRAY_SIZE (qi_reg_name))
 	goto normal;
+      if (!ANY_QI_REGNO_P (regno))
+	error ("unsupported size for integer register in 32-bit mode");
       reg = qi_reg_name[regno];
       break;
     case 0:

gcc/testsuite/ChangeLog

+2017-02-28  Uros Bizjak  <ubizjak@gmail.com>
+
+	* gcc.target/i386/invsize-1.c: New test.
+
 2017-02-28  Martin Sebor  <msebor@redhat.com>
 
 	PR tree-optimization/79691

gcc/testsuite/gcc.target/i386/invsize-1.c

+/* { dg-do compile { target ia32 } } */
+
+void foo (char x)
+{
+  register char rx __asm ("si") = x;
+
+  __asm__ volatile ("# %0" : : "r" (rx));
+} /* { dg-error "unsupported size" }  */