smhasher: Set UNALIGNED_SAFE for 64-bit intel too. #81
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This is better for perf, and also happens to suppress a new clang warning:
PMurHash.c(209,12): error: cast to smaller integer type 'long' from
'const unsigned char *' is a Microsoft extension [-Werror,-Wmicrosoft-cast]
int i = -(long)ptr & 3;
^~~~~~~~~
64-bit Windows is the only platform I know where long is smaller than
a pointer, and this code is in the !UNALIGNED_SAFE branch. So this patch
addresses the warning.
(Alternatively, we could insert a cast to (uintptr_t) before casting to
long, but the code seems to try to work before C99.)
https://crbug.com/1054220
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|
I forgot about amd64; we'll have to patch the warning in the unaligned branch for that. But this seems like a good change regardless. |
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Mar 15, 2020
The code causes a new compile warning, and it's unused. So stop building it. (See also aappleby/smhasher#81 failing to get traction.) Bug: 1054220,1058381 Change-Id: I68758e94cd2728df70e78c60e9be0bb4006a847a Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2103719 Auto-Submit: Nico Weber <[email protected]> Commit-Queue: Daniel Cheng <[email protected]> Reviewed-by: Daniel Cheng <[email protected]> Cr-Commit-Position: refs/heads/master@{#750421}
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This is better for perf, and also happens to suppress a new clang warning:
PMurHash.c(209,12): error: cast to smaller integer type 'long' from
'const unsigned char *' is a Microsoft extension [-Werror,-Wmicrosoft-cast]
int i = -(long)ptr & 3;
^~~~~~~~~
64-bit Windows is the only platform I know where long is smaller than
a pointer, and this code is in the !UNALIGNED_SAFE branch. So this patch
addresses the warning.
(Alternatively, we could insert a cast to (uintptr_t) before casting to
long, but the code seems to try to work before C99.)
https://crbug.com/1054220