6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-07 11:33:44 +00:00
Code Issues Projects Releases Wiki Activity

add an obvious load folding missed optzn.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45161 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-12-18 16:48:14 +00:00
parent 2b0e8990ab
commit 4185b52183
1 changed files with 21 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
lib/Target/X86/README.txt
View File

@ -1552,3 +1552,24 @@ _foo:
andl $65535, %eax
ret
//===---------------------------------------------------------------------===//
We're missing an obvious fold of a load into imul:
int test(long a, long b) { return a * b; }
LLVM produces:
_test:
movl 4(%esp), %ecx
movl 8(%esp), %eax
imull %ecx, %eax
ret
vs:
_test:
movl 8(%esp), %eax
imull 4(%esp), %eax
ret
//===---------------------------------------------------------------------===//