o separate information for reading and writing, because e.g. in a
try-block, only the writes to local variables and parameters are
volatile (they have to be committed immediately in case the next
instruction causes an exception)
o for now, only references to absolute memory addresses are marked
as volatile
o the volatily information is (should be) properly maintained throughout
all code generators for all archictures with this patch
o no optimizers or other compiler infrastructure uses the volatility
information yet
o this functionality is not (yet) exposed at the language level, it
is only for internal code generator use right now
git-svn-id: trunk@34996 -
it was AT_NONE, which is invalid and should never be used
* explicitly pass the correct value for all calls to those methods elsewhere
in the compiler
git-svn-id: trunk@34250 -
- Fixed access to symbols with offset.
- Always use register R9 for GOT pointer to prevent bugs when free register limit is reached in a function.
- GOT is not needed for function calls by name.
git-svn-id: trunk@31681 -
* apparently, wince (or GNU AS for it) does not support blx imm
* set FPC_IN_SYSTEM directive, so assembler code in divide.inc is compiled right
git-svn-id: trunk@29779 -
Switched codegeneration of VFPv2 and VFPv3 to use UAL mnemonics and syntax.
Updated VFP code in RTL to use UAL syntax too.
Added preliminary ELF support for ARM.
Added support for linking of WinCE COFF files. Should work for with a standard ARMv4-I target.
git-svn-id: branches/laksen/armiw@29247 -
on the stack, this can be enabled by -OoFORCENOSTACKFRAME. This reduces the required
entry/exit code and makes an extra register available to the compiler. However, since this is
based on an estimation of the required stack size, it might have two drawbacks:
either the stack frame is estimated to big, the program requires a bigger stack than needed
or it is estimated too small, then the compiler throws an internalerror during compilation. These
issues can be overcome as soon as the compiler supports recompiling subroutines if needed.
git-svn-id: trunk@27239 -
+ x86 targets now directly call procedure variables located in references.
- a_call_ref method removed from tcg and thlcgobj.
git-svn-id: trunk@26666 -
Use UXTH+UXTB instructions instead of two shifts on processors that supports that.
Eliminate internalerror when constant pointers are typecast as arrays.
git-svn-id: trunk@26647 -
If the constant only contains a string of ones starting from lsb or msb
we can shift out the bits accordingly, opening up some possibilities for
the peephole optimizer to fold at least one shift into another
operation.
git-svn-id: trunk@26565 -
This uses the generic optimizations done in optimize_op_const. Due to
this we can also drop some of the optimizations done in the arm-specific
code.
git-svn-id: trunk@26348 -
