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[Bug tree-optimization/19792] Missed optimizations due to signedness in the way
- From: "kazu at cs dot umass dot edu" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 16 Mar 2005 14:59:52 -0000
- Subject: [Bug tree-optimization/19792] Missed optimizations due to signedness in the way
- References: <20050206135036.19792.kazu@cs.umass.edu>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From kazu at cs dot umass dot edu 2005-03-16 14:59 -------
FYI, here is the tailc dump that I get with the current mainline.
;; Function foo (foo)
foo (t)
{
unsigned char D.1137;
unsigned int t.1;
unsigned char D.1135;
int t.0;
int D.1133;
<bb 0>:
t.0_2 = (int) t_1;
D.1135_4 = size_lookup[t.0_2];
D.1137_6 = size_lookup[t_1];
D.1133_7 = D.1135_4 == D.1137_6;
return D.1133_7;
}
;; Function bar (bar)
bar (t)
{
int a;
unsigned int a.2;
int D.1142;
<bb 0>:
a_2 = (int) t_1;
a.2_3 = (unsigned int) a_2;
D.1142_4 = t_1 == a.2_3;
return D.1142_4;
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19792