(emit_unop_insn): Don't do -fforce-mem for SIGN_EXTEND.

From-SVN: r10872

diff --git a/gcc/optabs.c b/gcc/optabs.c
index bb1b8398945bf0c594638eb861fc05161d772a91..cae4c4e9bd090e4e940b4037b3d3a36bef71042a 100644 (file)
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -2374,7 +2374,9 @@ emit_unop_insn (icode, target, op0, code)
 
   op0 = protect_from_queue (op0, 0);
 
-  if (flag_force_mem)
+  /* Sign extension from memory is often done specially on RISC
+     machines, so forcing into a register here can pessimize code.  */
+  if (flag_force_mem && code != SIGN_EXTEND)
     op0 = force_not_mem (op0);
 
   /* Now, if insn does not accept our operands, put them into pseudos.  */