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| author | Christopher Lamb <christopher.lamb@gmail.com> | 2007-12-18 21:32:20 +0000 |
|---|---|---|
| committer | Christopher Lamb <christopher.lamb@gmail.com> | 2007-12-18 21:32:20 +0000 |
| commit | f00ac6dd93c281cec9176575ad26c5bd7f497332 (patch) | |
| tree | ad99a4944ef8c30af9246a9f83d13339a7e2f6c7 /clang/Driver/RewriteTest.cpp | |
| parent | 95cc3e0e6626776d517766fa42dcbfbed63c59b0 (diff) | |
| download | bcm5719-llvm-f00ac6dd93c281cec9176575ad26c5bd7f497332.tar.gz bcm5719-llvm-f00ac6dd93c281cec9176575ad26c5bd7f497332.zip | |
Fold subtracts into integer compares vs. zero. This improves generate code for this case on X86
from
_foo:
movl $99, %ecx
movl 4(%esp), %eax
subl %eax, %ecx
xorl %edx, %edx
testl %ecx, %ecx
cmovs %edx, %eax
ret
to
_foo:
xorl %ecx, %ecx
movl 4(%esp), %eax
cmpl $99, %eax
cmovg %ecx, %eax
ret
llvm-svn: 45173
Diffstat (limited to 'clang/Driver/RewriteTest.cpp')
0 files changed, 0 insertions, 0 deletions
