(they don't have effect when they only appear in the implementation, and
therefore this situation will cause an error in the future)
git-svn-id: trunk@21523 -
This slightly changes the semantics of RegUsedAfterInstruction.
We now check if the `current value` of the register will be used later.
It will do `the right thing` for all the normal use cases.
git-svn-id: trunk@21519 -
The new version uses a pure pascal version for the 32bit case.
With the lastest compiler optimizations this generates optimal
4-instruction code which can be inlined. The rev-versions for
armv6+ are gone now, the inlineable pascal-code is faster than
the call-overhead for the rev-implementation.
The 64-bit versions received an updated assembly version which saves 4
cycles total on <armv6.
git-svn-id: trunk@21511 -
BIC clears the specified bits, while AND keeps them. The usage of BIC
allows a broader range of shifterconsts to be used on the ARM cpu, often
saving a cycle.
Previously code like:
Data:=Data and $FFFFFF00
would result in
mvn r1, #255
and r0, r0, r1
This patch changes this to
bic r0, r0, #255
git-svn-id: trunk@21510 -
The loop checked for the wrong instruction for .opcode = A_STR. Making
the whole optimizer non functional but at least not destructive.
git-svn-id: trunk@21508 -
This optimizer folds shift/roll operations into following data
instructions.
It will change code like:
mov r0, r0, lsl #16
add r1, r0, r1
into
add r1, r1, r0, lsl #16
Source registers will be reordered when necessary, also SUB/SBC will be
replaced with RSB/RSC and vice versa when reordering is required.
It could be expanded to support more operations like LDR/STR.
git-svn-id: trunk@21507 -
This changes the ARM Peephole optimizer RedundantMovProcess to also
recognize and modify something like the following sequence.
mov r0, r1
mov r0, r0, lsl #8
this would be changed into
mov r0, r1, lsl #8
git-svn-id: trunk@21506 -
BX is supported from ARMv4T onwards, but i don't have a armv4t device to
test it.
Using BX instead of mov pc,lr allows for a better pipeline utilization
by enabling the CPUs branch predictor to work properly.
git-svn-id: trunk@21505 -
procdef, so that the unit containing it is marked as "used" (mantis #15966)
Even better would be if the unit containing the originally found procsym
were not also marked as used, but that would require a significant
rewrite (all symbols found using symboltable helpers are automatically
marked by those routines)
git-svn-id: trunk@21501 -
longer split per directory, but in chunks of 100 tests (configurable via
the new CHUNKSIZE=xxx Makefile parameter), which then all can be checked
in parallel
o dependencies between tests are handled by always putting tests whose
name is the same except for the last character into the same chunk
o as previously, -jx can only be used for the "all" target, other targets
cannot be executed in parallel
o the "units" directory has been renamed "tstunits" because otherwise
"make distclean" will remove it entirely now that the main tests
makefile also compiles a program
git-svn-id: trunk@21479 -
