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| author | Chris Lattner <sabre@nondot.org> | 2006-04-17 21:22:06 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2006-04-17 21:22:06 +0000 |
| commit | 72d7c270698e67ceba9ce41fd6b1266fbf65050b (patch) | |
| tree | 3a7e712aa49d1964d68f782396dc21a8301ecc10 /llvm/lib/CodeGen/MachineInstr.cpp | |
| parent | 14c4972b6dfa4e325ec85aa37d72ae36eb13ead3 (diff) | |
| download | llvm-72d7c270698e67ceba9ce41fd6b1266fbf65050b.zip llvm-72d7c270698e67ceba9ce41fd6b1266fbf65050b.tar.gz llvm-72d7c270698e67ceba9ce41fd6b1266fbf65050b.tar.bz2 | |
Vectors that are known live-in and live-out are clearly already marked in
the vrsave register for the caller. This allows us to codegen a function as:
_test_rol:
mfspr r2, 256
mr r3, r2
mtspr 256, r3
vspltisw v2, -12
vrlw v2, v2, v2
mtspr 256, r2
blr
instead of:
_test_rol:
mfspr r2, 256
oris r3, r2, 40960
mtspr 256, r3
vspltisw v0, -12
vrlw v2, v0, v0
mtspr 256, r2
blr
llvm-svn: 27772
Diffstat (limited to 'llvm/lib/CodeGen/MachineInstr.cpp')
0 files changed, 0 insertions, 0 deletions