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| author | Derek Schuff <dschuff@chromium.org> | 2013-04-02 09:38:08 -0700 |
|---|---|---|
| committer | Derek Schuff <dschuff@chromium.org> | 2013-04-02 09:38:08 -0700 |
| commit | 99681c41b0bf46e9973cf4b3ef6d0b792103f29d (patch) | |
| tree | f479307a68fa07023194eb9c0389cf8f5165db47 /lib/Bitcode/Reader/BitReader.cpp | |
| parent | 26535c655b240324d5cdfcc61bec85d401f71214 (diff) | |
Disable shift-compare instcombine optimization for NaCl.
This is one of at least 2 optimizations which introduce non-power-of-two
integer sizes, which we don't want to allow in the PNaCl stable wire format.
This transforms
(icmp pred iM (shl iM %value, N), ConstInt)
-> (icmp pred i(M-N) (trunc %value iM to i(N-N)), (trunc (ConstInt >> N))
and reduces the size of the compare and its operands.
R=mseaborn@chromium.org
BUG= https://code.google.com/p/nativeclient/issues/detail?id=3360
Review URL: https://codereview.chromium.org/13182003
Diffstat (limited to 'lib/Bitcode/Reader/BitReader.cpp')
0 files changed, 0 insertions, 0 deletions