mips.md (*popcountdi2_trunc): New pattern to handle popcount of a truncation.

2012-07-21  Andrew Pinski  <apinski@cavium.com>

	* config/mips/mips.md (*popcountdi2_trunc): New pattern
	to handle popcount of a truncation.

2012-07-21  Andrew Pinski  <apinski@cavium.com>

	* gcc.target/mips/octeon-pop-2.c: New testcase.

From-SVN: r189744

gcc/ChangeLog

 2012-07-21  Andrew Pinski  <apinski@cavium.com>
 
+	* config/mips/mips.md (*popcountdi2_trunc): New pattern
+	to handle popcount of a truncation.
+
+2012-07-21  Andrew Pinski  <apinski@cavium.com>
+
 	* config/mips/mips-protos.h (mips_expand_ext_as_unaligned_load):
 	Add a bool argument.
 	* config/mips/mips.c (mips_block_move_straight): Update call to

gcc/config/mips/mips.md

@@ -2643,6 +2643,16 @@
   "<d>pop\t%0,%1"
   [(set_attr "type" "pop")
    (set_attr "mode" "<MODE>")])
+
+;; The POP instruction is special as it does not take into account the upper
+;; 32bits and is documented that way.
+(define_insn "*popcountdi2_trunc"
+  [(set (match_operand:SI 0 "register_operand" "=d")
+       (popcount:SI (truncate:SI (match_operand:DI 1 "register_operand" "d"))))]
+  "ISA_HAS_POP && TARGET_64BIT"
+  "pop\t%0,%1"
+  [(set_attr "type" "pop")
+   (set_attr "mode" "SI")])
 
 ;;
 ;;  ....................

gcc/testsuite/ChangeLog

+2012-07-21  Andrew Pinski  <apinski@cavium.com>
+
+	* gcc.target/mips/octeon-pop-2.c: New testcase.
+
 2012-07-21  Tobias Burnus  <burnus@net-b.de>
 
 	PR fortran/48820

gcc/testsuite/gcc.target/mips/octeon-pop-2.c

+/* { dg-do compile } */
+/* { dg-options "-O -march=octeon -mgp64" } */
+/* The pop instruction does not depend on the word value to be sign extended. */
+/* { dg-final { scan-assembler-not "sll\t" } } */
+
+long long f(long long i)
+{
+  return __builtin_popcount (i);
+}
+