re PR middle-end/25474 (Extra load for some FP code)

	PR middle-end/25474
	* expr.c (compress_float_constant): Copy the narrow constant into
	a new pseudo before extending it to its final width.

From-SVN: r112991

1 files changed, 5 insertions, 1 deletions

diff --git a/gcc/expr.c b/gcc/expr.c
index 8d2839f..b0e958c 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -3346,7 +3346,11 @@ compress_float_constant (rtx x, rtx y)
 	}
       else
 	continue;
- 
+
+      /* For CSE's benefit, force the compressed constant pool entry
+	 into a new pseudo.  This constant may be used in different modes,
+	 and if not, combine will put things back together for us.  */
+      trunc_y = force_reg (srcmode, trunc_y);
       emit_unop_insn (ic, x, trunc_y, UNKNOWN);
       last_insn = get_last_insn ();