re PR middle-end/77377 (c-c++-common/pr59037.c ICEs with -fpic -msse on i686)

	PR middle-end/77377
	* simplify-rtx.c (avoid_constant_pool_reference): For out of bounds
	constant pool reference return x instead of c.

	* gcc.target/i386/pr77377.c: New test.

From-SVN: r239854

gcc/ChangeLog

+2016-08-30  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/77377
+	* simplify-rtx.c (avoid_constant_pool_reference): For out of bounds
+	constant pool reference return x instead of c.
+
 2016-08-29  Segher Boessenkool  <segher@kernel.crashing.org>
 
 	* config/rs6000/rs6000.h (CALL_REALLY_USED_REGISTERS): Do not

gcc/simplify-rtx.c

@@ -251,15 +251,14 @@ avoid_constant_pool_reference (rtx x)
       /* If we're accessing the constant in a different mode than it was
          originally stored, attempt to fix that up via subreg simplifications.
          If that fails we have no choice but to return the original memory.  */
-      if ((offset != 0 || cmode != GET_MODE (x))
-	  && offset >= 0 && offset < GET_MODE_SIZE (cmode))
+      if (offset == 0 && cmode == GET_MODE (x))
+	return c;
+      else if (offset >= 0 && offset < GET_MODE_SIZE (cmode))
         {
           rtx tem = simplify_subreg (GET_MODE (x), c, cmode, offset);
           if (tem && CONSTANT_P (tem))
             return tem;
         }
-      else
-        return c;
     }
 
   return x;

gcc/testsuite/ChangeLog

 2016-08-30  Jakub Jelinek  <jakub@redhat.com>
 
+	PR middle-end/77377
+	* gcc.target/i386/pr77377.c: New test.
+
 	PR debug/77389
 	* g++.dg/debug/dwarf2/template-params-12f.C: Pass -gno-strict-dwarf
 	in dg-options.

gcc/testsuite/gcc.target/i386/pr77377.c

+/* PR middle-end/77377 */
+/* { dg-do compile } */
+/* { dg-options "-O3 -msse" } */
+/* { dg-additional-options "-fpic" { target fpic } } */
+
+#include "../../c-c++-common/pr59037.c"