Add fast register allocator, enabled with -regalloc=fast.

Browse Source

So far this is just a clone of -regalloc=local that has been lobotomized to run
25% faster. It drops the least-recently-used calculations, and is just plain
stupid when it runs out of registers.

The plan is to make this go even faster for -O0 by taking advantage of the short
live intervals in unoptimized code. It should not be necessary to calculate
liveness when most virtual registers are killed 2-3 instructions after they are
born.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102006 91177308-0d34-0410-b5e6-96231b3b80d8

...

This commit is contained in:

Jakob Stoklund Olesen

2010-04-21 18:02:42 +00:00

parent 9cdb4109d5

commit 00207237dd

4 changed files with 1114 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download Patch File Download Diff File Expand all files Collapse all files

1107

lib/CodeGen/RegAllocFast.cpp Normal file

File diff suppressed because it is too large Load Diff