* foptimize_strlen
@ 2014-02-10 8:56 Vikas Salar
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From: Vikas Salar @ 2014-02-10 8:56 UTC (permalink / raw)
To: gcc-help
Hi,
I'm getting one valgrind error of "Invalid read of size 4" with
executable build by g++481 with -O2 option.
Error is not reported if binary is build with g++481 with -O2 and
-fno-builtin-strlen on command line.
Though I think it's a valgrind false positive and my suspect g++481
optimization for this error is -foptimize-strlen, but error is not
reported if
binary is build with -O1 and -foptimize-strlen on command line.
My queries are:
does g++481 activates strlen optimization when -foptimize-strlen is
enables explicitly?
Is there any difference between fno-optimize-strlen and -fno-builtin-strlen?
Why error is reported with "-O2" and not with "-O1 -foptimize-strlen"?
Thanks,
Vikas
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