From 2493deee555bff3a4be1cc3ef011b4f7a4efdf71 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu@cs.umass.edu>
Date: Tue, 10 Feb 2004 22:40:30 +0000
Subject: [PATCH] h8300.md: Remove an incorrect comment about peephole2.
* config/h8300/h8300.md: Remove an incorrect comment about
peephole2. Add comments.
From-SVN: r77618
---
gcc/ChangeLog | 5 +++++
gcc/config/h8300/h8300.md | 14 +++++++++++---
2 files changed, 16 insertions(+), 3 deletions(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a3e050d89904..5cfcbfa21cdd 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2004-02-10 Kazu Hirata <kazu@cs.umass.edu>
+
+ * config/h8300/h8300.md: Remove an incorrect comment about
+ peephole2. Add comments.
+
2004-02-10 Josef Zlomek <zlomekj@suse.cz>
PR/14058
diff --git a/gcc/config/h8300/h8300.md b/gcc/config/h8300/h8300.md
index c0a9575f4cdf..99a72a35633f 100644
--- a/gcc/config/h8300/h8300.md
+++ b/gcc/config/h8300/h8300.md
@@ -4971,9 +4971,12 @@
operands[7] = gen_int_mode (INTVAL (operands[2]), QImode);")
;; These triggers right at the end of allocation of locals in the
-;; prologue. The only profitable cases are when we have stack
-;; adjustment of -4 or -12. That of -8 won't happen because it is
-;; always split into two consecutive subtractions of -4.
+;; prologue (and possibly at other places).
+
+;; stack adjustment of -8, generate one push
+;;
+;; before : 14 bytes, 22 clocks
+;; after : 8 bytes, 20 clocks
(define_peephole2
[(set (reg:SI SP_REG)
@@ -4987,6 +4990,11 @@
(match_dup 0))]
"")
+;; stack adjustment of -12, generate one push
+;;
+;; before : 10 bytes, 14 clocks
+;; after : 8 bytes, 14 clocks
+
(define_peephole2
[(set (reg:SI SP_REG)
(plus:SI (reg:SI SP_REG)
--
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