[SH][committed] Fix PR 67506

[Oleg Endo]

Hi,

I've committed the following fix for PR 67506 as r227646 on trunk and as
r227647 on the gcc-5 branch.

The patch was tested by Kaz on sh4-linux.  I've added the testcase and
briefly checked it with make all and
make -k check RUNTESTFLAGS="compile.exp=pr67506.c --target_board=sh-sim
\{-m2/-ml,-m2/-mb,-m2a/-mb,-m4/-ml,-m4/-mb,-m4a/-ml,-m4a/-mb}"
on trunk and gcc-5 branch.

Cheers,
Oleg

gcc/ChangeLog
        PR target/67506
        * config/sh/sh.c (sh_extending_set_of_reg::use_as_extended_reg): Add
        missing simplify_gen_subreg.

gcc/testsuite/ChangeLog
        PR target/67506
        * gcc.c-torture/compile/pr67506.c: New test.

Index: gcc/config/sh/sh.c
===================================================================
--- gcc/config/sh/sh.c	(revision 227639)
+++ gcc/config/sh/sh.c	(working copy)
@@ -14016,6 +14016,9 @@
   else
     {
       rtx extension_dst = XEXP (set_rtx, 0);
+      if (GET_MODE (extension_dst) != SImode)
+	extension_dst = simplify_gen_subreg (SImode, extension_dst,
+					     GET_MODE (extension_dst), 0);
       if (modified_between_p (extension_dst, insn, use_at_insn))
 	{
 	  if (dump_file)
Index: gcc/testsuite/gcc.c-torture/compile/pr67506.c
===================================================================
--- gcc/testsuite/gcc.c-torture/compile/pr67506.c	(revision 0)
+++ gcc/testsuite/gcc.c-torture/compile/pr67506.c	(working copy)
@@ -0,0 +1,53 @@
+extern struct _IO_FILE *stderr;
+typedef long integer;
+typedef unsigned char byte;
+short nl;
+byte * tfmfilearray;
+integer charbase, ligkernbase;
+unsigned char charsonline;
+short c;
+unsigned short r;
+struct {
+  short cc;
+  integer rr;
+} labeltable[259];
+short sortptr;
+unsigned char activity[(32510) + 1];
+integer ai, acti;
+extern void _IO_putc (char, struct _IO_FILE *);
+
+void
+mainbody (void)
+{
+  register integer for_end;
+  if (c <= for_end)
+    do {
+      if (((tfmfilearray + 1001)[4 * (charbase + c) + 2] % 4) == 1)
+	{
+	  if ( r < nl )
+	    ;
+	  else
+	    {
+	      while (labeltable[sortptr ].rr > r)
+		labeltable[sortptr + 1 ]= labeltable[sortptr];
+	    }
+	}
+    } while (c++ < for_end);
+
+  if (ai <= for_end)
+    do {
+      if (activity[ai]== 2)
+	{
+	  r = (tfmfilearray + 1001)[4 * (ligkernbase + (ai))];
+	  if (r < 128)
+	    {
+	      r = r + ai + 1 ;
+	      if (r >= nl)
+		{
+		  if (charsonline > 0)
+		    _IO_putc ('\n', stderr);
+		}
+	    }
+	}
+    } while (ai++ < for_end);
+}