From 8b1bf1e977f237ec4b74568e78ae6a36a3fdcdea Mon Sep 17 00:00:00 2001
From: dalej <dalej@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 12 Jul 2005 20:29:51 +0000
Subject: [PATCH] 2005-07-12 Dale Johannesen <dalej@apple.com>
* expr.c (compress_float_constant): Add cost check.
* config/rs6000.c (rs6000_rtx_cost): Adjust FLOAT_EXTEND cost.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@101938 138bc75d-0d04-0410-961f-82ee72b054a4
---
gcc/ChangeLog | 14 ++++++++++++++
gcc/config/rs6000/rs6000.c | 8 +++++++-
gcc/expr.c | 21 +++++++++++++++++++--
3 files changed, 40 insertions(+), 3 deletions(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 731f4af1a90c..30269f96f677 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,17 @@
+2005-07-12 Dale Johannesen <dalej@apple.com>
+
+ * expr.c (compress_float_constant): Add cost check.
+ * config/rs6000.c (rs6000_rtx_cost): Adjust FLOAT_EXTEND cost.
+
+2005-07-12 Dale Johannesen <dalej@apple.com>
+
+ * gcc.target/i386/compress-float-sse.c: New.
+ * gcc.target/i386/compress-float-sse-pic.c: New.
+ * gcc.target/i386/compress-float-387.c: New.
+ * gcc.target/i386/compress-float-387-pic.c: New.
+ * gcc.dg/compress-float-ppc.c: New.
+ * gcc.dg/compress-float-ppc-pic.c: New.
+
2005-07-12 Eric Christopher <echristo@redhat.com>
* gcc.c (struct infile): Update comment for language.
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 921d16ff7833..4cf8dd876e3b 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -18043,11 +18043,17 @@ rs6000_rtx_costs (rtx x, int code, int outer_code, int *total)
}
/* FALLTHRU */
+ case FLOAT_EXTEND:
+ if (mode == DFmode)
+ *total = 0;
+ else
+ *total = rs6000_cost->fp;
+ return false;
+
case FLOAT:
case UNSIGNED_FLOAT:
case FIX:
case UNSIGNED_FIX:
- case FLOAT_EXTEND:
case FLOAT_TRUNCATE:
*total = rs6000_cost->fp;
return false;
diff --git a/gcc/expr.c b/gcc/expr.c
index 01f890fa6a51..182ab2382be1 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -3202,9 +3202,15 @@ compress_float_constant (rtx x, rtx y)
enum machine_mode orig_srcmode = GET_MODE (y);
enum machine_mode srcmode;
REAL_VALUE_TYPE r;
+ int oldcost, newcost;
REAL_VALUE_FROM_CONST_DOUBLE (r, y);
+ if (LEGITIMATE_CONSTANT_P (y))
+ oldcost = rtx_cost (y, SET);
+ else
+ oldcost = rtx_cost (force_const_mem (dstmode, y), SET);
+
for (srcmode = GET_CLASS_NARROWEST_MODE (GET_MODE_CLASS (orig_srcmode));
srcmode != orig_srcmode;
srcmode = GET_MODE_WIDER_MODE (srcmode))
@@ -3229,12 +3235,23 @@ compress_float_constant (rtx x, rtx y)
the extension. */
if (! (*insn_data[ic].operand[1].predicate) (trunc_y, srcmode))
continue;
+ /* This is valid, but may not be cheaper than the original. */
+ newcost = rtx_cost (gen_rtx_FLOAT_EXTEND (dstmode, trunc_y), SET);
+ if (oldcost < newcost)
+ continue;
}
else if (float_extend_from_mem[dstmode][srcmode])
- trunc_y = validize_mem (force_const_mem (srcmode, trunc_y));
+ {
+ trunc_y = force_const_mem (srcmode, trunc_y);
+ /* This is valid, but may not be cheaper than the original. */
+ newcost = rtx_cost (gen_rtx_FLOAT_EXTEND (dstmode, trunc_y), SET);
+ if (oldcost < newcost)
+ continue;
+ trunc_y = validize_mem (trunc_y);
+ }
else
continue;
-
+
emit_unop_insn (ic, x, trunc_y, UNKNOWN);
last_insn = get_last_insn ();
--
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