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[Bug optimization/14844] New: [tree-ssa] narrow types if wide result is not needed
- 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: 4 Apr 2004 16:15:58 -0000
- Subject: [Bug optimization/14844] New: [tree-ssa] narrow types if wide result is not needed
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
Consider:
int
foo (int a, int b)
{
long long aa = a;
long long bb = b;
return aa + bb;
}
The last tree looks like:
foo (a, b)
{
<bb 0>:
return (int)(long long int)a + (int)(long long int)b;
}
We may be able to solve this problem by propagating narrowing casts backward.
--
Summary: [tree-ssa] narrow types if wide result is not needed
Product: gcc
Version: tree-ssa
Status: UNCONFIRMED
Keywords: pessimizes-code
Severity: enhancement
Priority: P2
Component: optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: kazu at cs dot umass dot edu
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14844