mirror/gcc
2
0
Fork 0
mirror of git://gcc.gnu.org/git/gcc.git synced 2025-01-12 09:24:34 +08:00
Code Issues Packages Projects Releases Wiki Activity

fold-const.c (fold): STRIP_NOPS when deciding whether or not something is a candidate for...

Browse Source 
* fold-const.c (fold): STRIP_NOPS when deciding whether or not
	something is a candidate for optimize_bit_field_compare.

From-SVN: r27169
This commit is contained in:
Mark Mitchell 1999-05-26 09:50:08 +00:00 committed by Mark Mitchell
parent f20b5577f8
commit b7f2c1fc1b
2 changed files with 19 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
Wed May 26 09:53:05 1999 Mark Mitchell <mark@codesourcery.com>
* fold-const.c (fold): STRIP_NOPS when deciding whether or not
something is a candidate for optimize_bit_field_compare.
Wed May 26 09:40:02 1999 Mark Mitchell <mark@codesourcery.com>
* gcc.texi (Passes): Document branch-shortening.

24
gcc/fold-const.c
View File

@ -6036,16 +6036,20 @@ fold (expr)
}
/* If this is a comparison of a field, we may be able to simplify it. */
if ((TREE_CODE (arg0) == COMPONENT_REF
|| TREE_CODE (arg0) == BIT_FIELD_REF)
&& (code == EQ_EXPR || code == NE_EXPR)
/* Handle the constant case even without -O
to make sure the warnings are given. */
&& (optimize || TREE_CODE (arg1) == INTEGER_CST))
{
t1 = optimize_bit_field_compare (code, type, arg0, arg1);
return t1 ? t1 : t;
}
{
tree xarg0 = arg0;
STRIP_NOPS (xarg0);
if ((TREE_CODE (xarg0) == COMPONENT_REF
|| TREE_CODE (xarg0) == BIT_FIELD_REF)
&& (code == EQ_EXPR || code == NE_EXPR)
/* Handle the constant case even without -O
to make sure the warnings are given. */
&& (optimize || TREE_CODE (arg1) == INTEGER_CST))
{
t1 = optimize_bit_field_compare (code, type, xarg0, arg1);
return t1 ? t1 : t;
}
}
/* If this is a comparison of complex values and either or both sides
are a COMPLEX_EXPR or COMPLEX_CST, it is best to split up the