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| author | Dale Johannesen <dalej@apple.com> | 2009-02-11 19:19:41 +0000 |
|---|---|---|
| committer | Dale Johannesen <dalej@apple.com> | 2009-02-11 19:19:41 +0000 |
| commit | cc5fc44d0203c25729c631e273a45efdbb7b5d98 (patch) | |
| tree | c357fe2684eb82c257fa8a928e6d864e6b227d24 /llvm/lib/Bitcode/Reader/BitcodeReader.cpp | |
| parent | 761b90b8251d9092d2c36bd3073dbd594472e0de (diff) | |
| download | bcm5719-llvm-cc5fc44d0203c25729c631e273a45efdbb7b5d98.tar.gz bcm5719-llvm-cc5fc44d0203c25729c631e273a45efdbb7b5d98.zip | |
Make a transformation added in 63266 a bit less aggressive.
It was transforming (x&y)==y to (x&y)!=0 in the case where
y is variable and known to have at most one bit set (e.g. z&1).
This is not correct; the expressions are not equivalent when y==0.
I believe this patch salvages what can be salvaged, including
all the cases in bt.ll. Dan, please review.
Fixes gcc.c-torture/execute/20040709-[12].c
llvm-svn: 64314
Diffstat (limited to 'llvm/lib/Bitcode/Reader/BitcodeReader.cpp')
0 files changed, 0 insertions, 0 deletions
