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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2013-07-12 18:06:44 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2013-07-12 18:06:44 +0000 |
| commit | 068a2253e925357c1b0d9cb2081a8cd7d9077715 (patch) | |
| tree | 4b97827b1b30d9d4372884641e989a2478ff40f0 /llvm/tools/llvm-mcmarkup/llvm-mcmarkup.cpp | |
| parent | c30e0d759d82254334db9da629dd748a58fd6587 (diff) | |
| download | bcm5719-llvm-068a2253e925357c1b0d9cb2081a8cd7d9077715.tar.gz bcm5719-llvm-068a2253e925357c1b0d9cb2081a8cd7d9077715.zip | |
X86: Shrink certain forms of movsx.
In particular:
movsbw %al, %ax --> cbtw
movswl %ax, %eax --> cwtl
movslq %eax, %rax --> cltq
According to Intel's manual those have the same performance characteristics but
come with a smaller encoding.
llvm-svn: 186174
Diffstat (limited to 'llvm/tools/llvm-mcmarkup/llvm-mcmarkup.cpp')
0 files changed, 0 insertions, 0 deletions
