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| author | Chris Lattner <sabre@nondot.org> | 2005-10-10 22:04:48 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-10-10 22:04:48 +0000 |
| commit | e260ed8628bbe245ffc39b130d121f2f50dc0bce (patch) | |
| tree | 77733604834b1cb73b690698d794ce0365a511bd /llvm/lib/CodeGen/MachineFunction.cpp | |
| parent | 89a39f15089f7ba9b1a8ee698aa89a6b7d15a4cd (diff) | |
| download | llvm-e260ed8628bbe245ffc39b130d121f2f50dc0bce.zip llvm-e260ed8628bbe245ffc39b130d121f2f50dc0bce.tar.gz llvm-e260ed8628bbe245ffc39b130d121f2f50dc0bce.tar.bz2 | |
Add support for CombineTo, allowing the dag combiner to replace nodes with
multiple results.
Use this support to implement trivial store->load forwarding, implementing
CodeGen/PowerPC/store-load-fwd.ll. Though this is the most simple case and
can be extended in the future, it is still useful. For example, it speeds
up 197.parser by 6.2% by avoiding an LSU reject in xalloc:
stw r6, lo16(l5_end_of_array)(r2)
addi r2, r5, -4
stwx r5, r4, r2
- lwzx r5, r4, r2
- rlwinm r5, r5, 0, 0, 30
stwx r5, r4, r2
lwz r2, -4(r4)
ori r2, r2, 1
llvm-svn: 23690
Diffstat (limited to 'llvm/lib/CodeGen/MachineFunction.cpp')
0 files changed, 0 insertions, 0 deletions