archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-21 03:24:38 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

7110586: C2 generates incorrect results

Browse source 
Exact limit of empty loop calculated incorrectly.

Reviewed-by: iveresov, never
This commit is contained in:
Vladimir Kozlov 2011-11-10 20:17:05 -08:00
parent 3de3451b3a
commit 157ba53d27
2 changed files with 132 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

1
hotspot/src/share/vm/opto/loopnode.cpp
View file

@ -715,7 +715,6 @@ Node* PhaseIdealLoop::exact_limit( IdealLoopTree *loop ) {
long limit_con = cl->limit()->get_int();
julong trip_cnt = cl->trip_count();
long final_con = init_con + trip_cnt*stride_con;
final_con -= stride_con;
int final_int = (int)final_con;
// The final value should be in integer range since the loop
// is counted and the limit was checked for overflow.