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

From-SVN: r10872

(emit_unop_insn): Don't do -fforce-mem for SIGN_EXTEND.
From-SVN: r10872
8e1e2862 · Richard Kenner · d902f80a · 8e1e2862
Commit 8e1e2862 authored Dec 27, 1995 by Richard Kenner
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gcc/optabs.c
+3 -1

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--- 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.  */