* config/rs6000/rs6000.md (movsf): Don't convert a SUBREG

of the function return register into a plain REG until
after function inlining is done.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@30224 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fc5d466..7b90de6 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+Thu Oct 28 10:20:02 1999  Geoffrey Keating  <geoffk@cygnus.com>
+
+       * config/rs6000/rs6000.md (movsf): Don't convert a SUBREG
+       of the function return register into a plain REG until
+       after function inlining is done.
+
 Wed Oct 27 15:21:46 1999  Richard Henderson  <rth@cygnus.com>
 
        * jump.c (jump_optimize_1): If we did cross-jumping, and

diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index 7305436..7d313ab 100644 (file)
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -6256,7 +6256,9 @@
      reg.  So expand it.  */
   if (GET_CODE (operands[0]) == SUBREG
       && GET_CODE (SUBREG_REG (operands[0])) == REG
-      && REGNO (SUBREG_REG (operands[0])) < FIRST_PSEUDO_REGISTER)
+      && REGNO (SUBREG_REG (operands[0])) < FIRST_PSEUDO_REGISTER
+      && (! REG_FUNCTION_VALUE_P (SUBREG_REG (operands[0]))
+         || ! rtx_equal_function_value_matters))
     operands[0] = alter_subreg (operands[0]);
   if (GET_CODE (operands[1]) == SUBREG
       && GET_CODE (SUBREG_REG (operands[1])) == REG