(movsf): Don't truncate if not register; clean up.

From-SVN: r7907

diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index 9915670b1f180a403640af656d7e3214a7a44034..856bf45c2a736917ad10331f80e8522e6319a733 100644 (file)
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -3794,18 +3794,18 @@
 
   if (GET_CODE (operands[0]) == MEM)
     {
-      operands[1] = force_reg (SFmode, operands[1]);
-      if (! TARGET_POWERPC)
-       if (reload_in_progress || reload_completed)
-         emit_insn (gen_truncdfsf2 (operands[1],
+      /* If operands[1] is a register, it may have double-precision data
+        in it, so truncate it to single precision.  We need not do
+        this for POWERPC.  */
+      if (! TARGET_POWERPC && GET_CODE (operands[1]) == REG)
+       {
+         rtx newreg = reload_in_progress ? operands[1] : gen_reg_rtx (SFmode);
+         emit_insn (gen_truncdfsf2 (newreg,
                                     gen_rtx (SUBREG, DFmode, operands[1], 0)));
-       else
-         {
-           rtx newreg = gen_reg_rtx (SFmode);
-           emit_insn (gen_truncdfsf2 (newreg,
-                                       gen_rtx (SUBREG, DFmode, operands[1], 0)));
-           operands[1] = newreg;
-          }
+         operands[1] = newreg;
+       }
+
+      operands[1] = force_reg (SFmode, operands[1]);
     }
 
   if (GET_CODE (operands[0]) == REG && REGNO (operands[0]) < 32)