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| author | Hal Finkel <hfinkel@anl.gov> | 2015-01-10 08:21:59 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2015-01-10 08:21:59 +0000 |
| commit | 5d5d1539ccd8e960260fb0bad1d2733a51e71b27 (patch) | |
| tree | e9640ec55f1a348f342a57c93c5cae32a08877dc /clang/lib/Frontend/CompilerInvocation.cpp | |
| parent | 17744c1e0d710e318550c30afddcf30186125b8f (diff) | |
| download | llvm-5d5d1539ccd8e960260fb0bad1d2733a51e71b27.zip llvm-5d5d1539ccd8e960260fb0bad1d2733a51e71b27.tar.gz llvm-5d5d1539ccd8e960260fb0bad1d2733a51e71b27.tar.bz2 | |
[PowerPC] Mark zext of a small scalar load as free
This initial implementation of PPCTargetLowering::isZExtFree marks as free
zexts of small scalar loads (that are not sign-extending). This callback is
used by SelectionDAGBuilder's RegsForValue::getCopyToRegs, and thus to
determine whether a zext or an anyext is used to lower illegally-typed PHIs.
Because later truncates of zero-extended values are nops, this allows for the
elimination of later unnecessary truncations.
Fixes the initial complaint associated with PR22120.
llvm-svn: 225584
Diffstat (limited to 'clang/lib/Frontend/CompilerInvocation.cpp')
0 files changed, 0 insertions, 0 deletions