mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-23 02:29:18 +00:00
algorithm when assigning EnumValues to the synthesized registers. The current algorithm, LessRecord, uses the StringRef compare_numeric function. This function compares strings, while handling embedded numbers. For example, the R600 backend registers are sorted as follows: T1 T1_W T1_X T1_XYZW T1_Y T1_Z T2 T2_W T2_X T2_XYZW T2_Y T2_Z In this example, the 'scaling factor' is dEnum/dN = 6 because T0, T1, T2 have an EnumValue offset of 6 from one another. However, in other parts of the register bank, the scaling factors are different: dEnum/dN = 5: KC0_128_W KC0_128_X KC0_128_XYZW KC0_128_Y KC0_128_Z KC0_129_W KC0_129_X KC0_129_XYZW KC0_129_Y KC0_129_Z The diff lists do not work correctly because different kinds of registers have different 'scaling factors'. This new algorithm, LessRecordRegister, tries to enforce a scaling factor of 1. For example, the registers are now sorted as follows: T1 T2 T3 ... T0_W T1_W T2_W ... T0_X T1_X T2_X ... KC0_128_W KC0_129_W KC0_130_W ... For the Mips and R600 I see a 19% and 6% reduction in size, respectively. I did see a few small regressions, but the differences were on the order of a few bytes (e.g., AArch64 was 16 bytes). I suspect there will be even greater wins for targets with larger register files. Patch reviewed by Jakob. rdar://14006013 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185094 91177308-0d34-0410-b5e6-96231b3b80d8 |
||
---|---|---|
.. | ||
bugpoint | ||
buildit | ||
count | ||
crosstool | ||
emacs | ||
FileCheck | ||
FileUpdate | ||
fpcmp | ||
git | ||
git-svn | ||
jedit | ||
kate | ||
KillTheDoctor | ||
lint | ||
lit | ||
llvm-build | ||
llvm-lit | ||
Misc | ||
not | ||
PerfectShuffle | ||
release | ||
TableGen | ||
Target/ARM | ||
testgen | ||
textmate | ||
unittest | ||
valgrind | ||
vim | ||
yaml-bench | ||
check-each-file | ||
clang-parse-diagnostics-file | ||
codegen-diff | ||
countloc.sh | ||
DSAclean.py | ||
DSAextract.py | ||
findmisopt | ||
findoptdiff | ||
findsym.pl | ||
GenLibDeps.pl | ||
GetRepositoryPath | ||
GetSourceVersion | ||
getsrcs.sh | ||
lldbDataFormatters.py | ||
llvm-compilers-check | ||
llvm-native-gcc | ||
llvm-native-gxx | ||
llvm.grm | ||
llvm.natvis | ||
LLVMBuild.txt | ||
llvmdo | ||
llvmgrep | ||
Makefile | ||
makellvm | ||
profile.pl | ||
sort_includes.py | ||
test_debuginfo.pl | ||
UpdateCMakeLists.pl | ||
wciia.py |