diff options
| author | Reed Kotler <rkotler@mips.com> | 2013-08-16 23:05:18 +0000 |
|---|---|---|
| committer | Reed Kotler <rkotler@mips.com> | 2013-08-16 23:05:18 +0000 |
| commit | 80f60610826158dcbfbeb5c235ca0ea673d23281 (patch) | |
| tree | 5cc9298fdfefc2de4049f5513bcd2aea2c4ad199 /docs/CommandGuide | |
| parent | 0c1c5b0aaac80ca233523379617df93bbc0e2014 (diff) | |
| download | llvm-80f60610826158dcbfbeb5c235ca0ea673d23281.tar.gz llvm-80f60610826158dcbfbeb5c235ca0ea673d23281.tar.bz2 llvm-80f60610826158dcbfbeb5c235ca0ea673d23281.tar.xz | |
Fix a subtle difference between running clang vs llc for mips16.
This regards how mips16 is viewed. It's not really a target type but
there has always been a target for it in the td files. It's more properly
-mcpu=mips32 -mattr=+mips16 . This is how clang treats it but we have
always had the -mcpu=mips16 which I probably should delete now but it will
require updating all the .ll test cases for mips16. In this case it changed
how we decide if we have a count bits instruction and whether instruction
lowering should then expand ctlz. Now that we have dual mode compilation,
-mattr=+mips16 really just indicates the inital processor mode that
we are compiling for. (It is also possible to have -mcpu=64 -mattr=+mips16
but as far as I know, nobody has even built such a processor, though there
is an architecture manual for this).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188586 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs/CommandGuide')
0 files changed, 0 insertions, 0 deletions