allocator (such as stack/framepointers) with virtual registers, otherwise
they can get changed in case the virtual register gets changed (read-only
use would be ok, but we don't keep track of which virtual registers are
only read
git-svn-id: trunk@27104 -
registers itself, it requires them to be in SSA form. Therefore we
spill all registers that are written more than once to memory.
+ support in the generic register allocator for generating code that is
SSA-safe
+ spilling helpers for llvm
git-svn-id: branches/hlcgllvm@26044 -
do_spill_replace routines, will be necessary by llvm register
allocator to determine the tdef corresponding to that register
* replaced uses of taicpu with tai_cpu_abstract_sym in the register
allocator so that it can work both with taicpu and taillvm instructions
git-svn-id: branches/hlcgllvm@26043 -
rgobj.pas, trgobj.generate_interference_graph:
* pass "regtype" instead of "R_INTREGISTER" to newreg so that "aX" or "aregX" is print for address registers
git-svn-id: trunk@25665 -
+ Implemented subset of "spill replace" functionality, replacing moves from/to spilled registers with loads/stores to spill locations. This helps to reduce amount of instructions.
git-svn-id: trunk@24900 -
registers like the M68k): check whether the register type of the base/index register
of the instruction's reference is the same as the one we are doing register allocation
for. Otherwise the address registers can become corrupted.
git-svn-id: trunk@22748 -
cgutils, and define them so they are no larger than what is required by
the current target platform
* added cgutils to the uses clause of several units that use the
tcpuregisterset type
git-svn-id: trunk@21624 -
o support for the new codepage-aware ansistrings in the jvm branch
o empty ansistrings are now always represented by a nil pointer rather than
by an empty string, because an empty string also has a code page which
can confuse code (although this will make ansistrings harder to use
in Java code)
o more string helpers code shared between the general and jvm rtl
o support for indexbyte/word in the jvm rtl (warning: first parameter
is an open array rather than an untyped parameter there, so
indexchar(pcharvar^,10,0) will be equivalent to
indexchar[pcharvar^],10,0) there, which is different from what is
intended; changing it to an untyped parameter wouldn't help though)
o default() support is not yet complete
o calling fpcres is currently broken due to limitations in
sysutils.executeprocess() regarding handling unix quoting and
the compiler using the same command lines for scripts and directly
calling external programs
o compiling the Java compiler currently requires adding ALLOW_WARNINGS=1
to the make command line
git-svn-id: branches/jvmbackend@20887 -
as well as insert_regalloc_info_all()
+ "register" allocator for the jvm target, which simply replaces every
virtual register with a temp. This is done for all register types in
one pass, so that the temps can be easily reused without worrying
about conflicts. Small optimisation: alloc/store/dealloc/load
sequences for a single reg are removed (many of these are generated
because most cg nodes return their value in a register which is then
immediately consumed by the parent)
* map addressregisters to integer registers with size R_SUBD, because
they require one stackslot (the subregister type is used by rgcpu
to determine the size of the temp it has to allocate)
git-svn-id: branches/jvmbackend@18316 -
of the same register (or of a register and its aliases) -> make
sure that all relevant constraints are applied to it as well
(mantis #16980)
git-svn-id: trunk@15952 -
+ RTL support:
o VFP exceptions are disabled by default on Darwin,
because they cause kernel panics on iPhoneOS 2.2.1 at least
o all denormals are truncated to 0 on Darwin, because disabling
that also causes kernel panics on iPhoneOS 2.2.1 (probably
because otherwise denormals can also cause exceptions)
* set softfloat rounding mode correctly for non-wince/darwin/vfp
targets
+ compiler support: only half the number of single precision
registers is available due to limitations of the register
allocator
+ added a number of comments about why the stackframe on ARM is
set up the way it is by the compiler
+ added regtype and subregtype info to regsets, because they're
also used for VFP registers (+ support in assembler reader)
+ various generic support routines for dealing with floating point
values located in integer registers that have to be transferred to
mm registers (needed for VFP)
* renamed use_sse() to use_vectorfpu() and also use it for
ARM/vfp support
o only superficially tested for Linux (compiler compiled with -Cpvfpv6
-Cfvfpv2 works on a Cortex-A8, no testsuite run performed -- at least
the fpu exception handler still needs to be implemented), Darwin has
been tested more thoroughly
+ added ARMv6 cpu type and made it default for Darwin/ARM
+ ARMv6+ implementations of atomic operations using ldrex/strex
* don't use r9 on Darwin/ARM, as it's reserved under certain
circumstances (don't know yet which ones)
* changed C-test object files for ARM/Darwin to ARMv6 versions
* check in assembler reader that regsets are not empty, because
instructions with a regset operand have undefined behaviour in that
case
* fixed resultdef of tarmtypeconvnode.first_int_to_real in case of
int64->single type conversion
* fixed constant pool locations in case 64 bit constants are generated,
and/or when vfp instructions with limited reach are present
WARNING: when using VFP on an ARMv6 or later cpu, you *must* compile all
code with -Cparmv6 (or higher), or you will get crashes. The reason is
that storing/restoring multiple VFP registers must happen using
different instructions on pre/post-ARMv6.
git-svn-id: trunk@14317 -
shortstring temps don't get maximum alignment)
* changed some gettemptyed() calls into gettemp() calls (gettemptyped
means that this temp can only be used for temps of that type,
which is necessary for refcounted types but not for floats)
git-svn-id: trunk@12036 -
* Suppressed 2 unreachable code warnings.
* Now x86 compiler compiles without warnings and notes! It will be great to keep such state in future...
git-svn-id: trunk@11455 -
