https://llvm.org/bugs/show_bug.cgi?id=31075
Bug ID: 31075
Summary: clang doesn't seem to unroll loops for SHA1
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected]
Classification: Unclassified
Currently, lib/Support/SHA1.cpp contains unrolled loops. If I reroll them, the
performance of SHA1 computation worsens from 180 MB/sec to 130 MB/sec.
To see it yourself, please apply this patch. This patch contains llvm-sha1
command for your convenience.
https://reviews.llvm.org/D26891
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