-O3 -msse2)
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Summary: conditional evaluation incorrect with -O3
Product: gcc
Version: 4.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: erik dot
--- Comment #3 from erik dot moller at cycos dot com 2008-08-18 16:20
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Created an attachment (id=16084)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16084&action=view)
main() for the testcase
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37096
--- Comment #4 from erik dot moller at cycos dot com 2008-08-18 16:20
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Created an attachment (id=16085)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16085&action=view)
the test case
it's as minimal I could get it...
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37096
--- Comment #5 from erik dot moller at cycos dot com 2008-08-18 16:22
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the printf("shouldn't happen: %d\n", pAR[0]) happens when debug flags -O2 or
-O3 and -msse2 are set.
the printf("nz: %d\n", nZ); seems to do something awful...
void fun(short *pAR)
--- Comment #6 from erik dot moller at cycos dot com 2008-09-08 10:54
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bug is still in 4.3.2
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erik dot moller at cycos dot com changed:
What|Removed |Added
--- Comment #9 from erik dot moller at cycos dot com 2008-09-12 11:33
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true, -fno-strict-aliasing makes even -O3 work... I don't know about the
liasing, the example is very simple, can that happen when the SSE2 intrinsics
are involved?
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http://gcc.gnu.org/bug
