* Fwd: Regd GCC Compiler optimization flags - pls ignore the prev mail
@ 2004-06-21 5:41 mily vishwa
0 siblings, 0 replies; only message in thread
From: mily vishwa @ 2004-06-21 5:41 UTC (permalink / raw)
To: gcc-help
Hi all
The Gcc Compiler online
document(http://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html)
specifies that
"Not all optimizations are controlled directly by a
flag. Only optimizations that have a flag are listed.
"
Does this mean that for O1/O2/O3/Os optimization
levels, the compiler does some optimizations of which
only some of them
have flags listed ??? For example O1 consists of not
just these optimizations
-fdefer-pop
-fmerge-constants
-fthread-jumps
-floop-optimize
-fif-conversion
-fif-conversion2
-fdelayed-branch
-fguess-branch-probability
-fcprop-registers
but some other additional optimization ones too
If the above is true , then can anyone let me know as
to what kind of optimizations are done by the compiler
for which the flags are not listed ?
Regards
mily
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2004-06-21 5:41 Fwd: Regd GCC Compiler optimization flags - pls ignore the prev mail mily vishwa
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