gcc960 Compiler Driver
2-31
2
f[no-]split_mem Split all multi-word moves into
sequences of single word moves to
improve copy propagation.
funsigned-char | Make the type char be unsigned, like
unsigned char (funsigned-char), or make the type
char be signed, like signed char
(fno-unsigned-char)
. funsigned-
char
is equivalent to fnosigned-char.
By default,
char variables are treated as
unsigned.
f[no-]strength-reduce Perform loop strength reduction and
eliminate induction variables. See the
Glossary for more information.
fsyntax-only Check the syntax of C source file(s),
without generating an object file.
f[no-]thread-jumps Test whether a jump branches to a
location where another comparison
subsumed by the first is found. If so, the
first branch is redirected to either the
destination of the second branch or to a
point immediately following it,
depending on whether the condition is
known to be true or false.
f[no-]unroll-all-loops Perform the optimization of loop
unrolling on all loops. This is not
recommended as it increases code size
and usually degrades runtime
performance.
funroll-all-loops
enables both fstrength-reduce and
frerun-cse-after-loop.
f[no-]unroll-loops Break up a loop into several iterations of
the loop body. This typically improves
performance, since the loop's exit
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