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| author | Chris Lattner <sabre@nondot.org> | 2007-12-05 22:58:19 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2007-12-05 22:58:19 +0000 |
| commit | ad05e1749169c01953da819ded8b85d448fee2d2 (patch) | |
| tree | 786acde9121faa97cb38650cad93f64e33582dce /llvm/lib | |
| parent | 152dd812b2308c1908c1956ac8ae4e6f31b47e13 (diff) | |
| download | bcm5719-llvm-ad05e1749169c01953da819ded8b85d448fee2d2.tar.gz bcm5719-llvm-ad05e1749169c01953da819ded8b85d448fee2d2.zip | |
add a note
llvm-svn: 44637
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/README.txt | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/README.txt b/llvm/lib/Target/X86/README.txt index af73658bb36..7705c1ba31e 100644 --- a/llvm/lib/Target/X86/README.txt +++ b/llvm/lib/Target/X86/README.txt @@ -1532,3 +1532,23 @@ _test: ret This should just fldl directly from the input stack slot. + +//===---------------------------------------------------------------------===// + +This code: +int foo (int x) { return (x & 65535) | 255; } + +Should compile into: + +_foo: + movzwl 4(%esp), %eax + orb $-1, %al ;; 'orl 255' is also fine :) + ret + +instead of: +_foo: + movl $255, %eax + orl 4(%esp), %eax + andl $65535, %eax + ret + |
