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| author | Luke Cheeseman <luke.cheeseman@arm.com> | 2015-07-24 09:31:48 +0000 |
|---|---|---|
| committer | Luke Cheeseman <luke.cheeseman@arm.com> | 2015-07-24 09:31:48 +0000 |
| commit | b5c627aba864517300df961027dbc85a9d3c142e (patch) | |
| tree | 2fec3b37dc4fac3eb32a63331a08a06a890ba8e2 /clang/lib/CodeGen/ModuleBuilder.cpp | |
| parent | 5aa27e1acca98e3f8f1cf2da47dc4b05297786c5 (diff) | |
| download | llvm-b5c627aba864517300df961027dbc85a9d3c142e.zip llvm-b5c627aba864517300df961027dbc85a9d3c142e.tar.gz llvm-b5c627aba864517300df961027dbc85a9d3c142e.tar.bz2 | |
When lowering vector shifts a check is performed to see if the value to shift by
is an immediate, in this check the value is negated and stored in and int64_t.
The value can be -2^63 yet the result cannot be stored in an int64_t and this
gives some undefined behaviour causing failures. The negation is only necessary
when the values is within a certain range and so it should not need to negate
-2^63, this patch introduces this and also a regression test.
Differential Revision: http://reviews.llvm.org/D11408
llvm-svn: 243100
Diffstat (limited to 'clang/lib/CodeGen/ModuleBuilder.cpp')
0 files changed, 0 insertions, 0 deletions