From 632e21759952448dc8dc08ea24478f1990d7d6b9 Mon Sep 17 00:00:00 2001
From: sayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 8 Feb 2005 03:38:26 +0000
Subject: [PATCH] * simplify-rtx.c (simplify_relational_operation_1):
Avoid creating zero extensions of BImode operands. Call
lowpart_subreg instead of gen_lowpart_common and gen_lowpart_SUBREG.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@94730 138bc75d-0d04-0410-961f-82ee72b054a4
---
gcc/ChangeLog | 6 ++++++
gcc/simplify-rtx.c | 15 ++++-----------
2 files changed, 10 insertions(+), 11 deletions(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index adc920625eaa..fbd956b273d4 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2005-02-07 Roger Sayle <roger@eyesopen.com>
+
+ * simplify-rtx.c (simplify_relational_operation_1): Avoid creating
+ zero extensions of BImode operands. Call lowpart_subreg instead
+ of gen_lowpart_common and gen_lowpart_SUBREG.
+
2005-02-07 Nathanael Nerode <neroden@gcc.gnu.org>
PR ada/19489
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c
index a92fc3c71c67..95735e6f4cdc 100644
--- a/gcc/simplify-rtx.c
+++ b/gcc/simplify-rtx.c
@@ -2886,19 +2886,12 @@ simplify_relational_operation_1 (enum rtx_code code, enum machine_mode mode,
&& op1 == const0_rtx
&& GET_MODE_CLASS (mode) == MODE_INT
&& cmp_mode != VOIDmode
+ && cmp_mode != BImode
&& nonzero_bits (op0, cmp_mode) == 1
&& STORE_FLAG_VALUE == 1)
- {
- rtx tmp;
- if (GET_MODE_SIZE (mode) > GET_MODE_SIZE (cmp_mode))
- return simplify_gen_unary (ZERO_EXTEND, mode, op0, cmp_mode);
- tmp = gen_lowpart_common (mode, op0);
- if (tmp)
- return tmp;
- if (GET_MODE (op0) != mode)
- return gen_lowpart_SUBREG (mode, op0);
- return op0;
- }
+ return GET_MODE_SIZE (mode) > GET_MODE_SIZE (cmp_mode)
+ ? simplify_gen_unary (ZERO_EXTEND, mode, op0, cmp_mode)
+ : lowpart_subreg (mode, op0, cmp_mode);
return NULL_RTX;
}
--
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