6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-17 20:29:31 +00:00
Code Issues Projects Releases Wiki Activity

new example

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25903 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-02-02 07:37:11 +00:00
parent 93c740bbbb
commit 275b8846d5
1 changed files with 19 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
lib/Target/PowerPC/README.txt
View File

@ -448,3 +448,22 @@ LBB1_2:
blr blr
noticed in 2005-05-11-Popcount-ffs-fls.c. noticed in 2005-05-11-Popcount-ffs-fls.c.
===-------------------------------------------------------------------------===
We should custom expand setcc instead of pretending that we have it. That
would allow us to expose the access of the crbit after the mfcr, allowing
that access to be trivially folded into other ops. A simple example:
int foo(int a, int b) { return (a < b) << 4; }
compiles into:
_foo:
cmpw cr7, r3, r4
mfcr r2, 1
rlwinm r2, r2, 29, 31, 31
slwi r3, r2, 4
blr