| commit | 47bbfe3bd01e23ff8fd416cd3fd9223414c5d9f4 | |
| author | Andrea Di Biagio <Andrea_DiBiagio@sn.scee.net> | |
| Wed, 15 Aug 2018 12:53:38 +0000 (15 12:53 +0000) | ||
| committer | Andrea Di Biagio <Andrea_DiBiagio@sn.scee.net> | |
| Wed, 15 Aug 2018 12:53:38 +0000 (15 12:53 +0000) | ||
| tree | 71a5a66169e40e16470af069e06fb237db2856ef | treesnapshot (tar.gz zip) |
| parent | 8ae415fb86e374a3f6a4ac618d9fae13e0f18e25 | commitdiff |
[llvm-mca] Fix PR38575: Avoid an invalid implicit truncation of a processor resource mask (an uint64_t value) to unsigned.
This patch fixes a regression introduced at revision 338702.
A processor resource mask was incorrectly implicitly truncated to an unsigned
quantity. Later on, the truncated mask was used to initialize an element of a
vector of processor resource descriptors.
On targets with more than 32 processor resources, some elements of the vector
are left uninitialized. As a consequence, this bug might have eventually caused
a crash due to null dereference in the Scheduler.
This patch fixes PR38575, and adds a test for it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@339768 91177308-0d34-0410-b5e6-96231b3b80d8
This patch fixes a regression introduced at revision 338702.
A processor resource mask was incorrectly implicitly truncated to an unsigned
quantity. Later on, the truncated mask was used to initialize an element of a
vector of processor resource descriptors.
On targets with more than 32 processor resources, some elements of the vector
are left uninitialized. As a consequence, this bug might have eventually caused
a crash due to null dereference in the Scheduler.
This patch fixes PR38575, and adds a test for it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@339768 91177308-0d34-0410-b5e6-96231b3b80d8
| test/tools/llvm-mca/AArch64/Exynos/pr38575.s | [new file with mode: 0644] | blob |
| tools/llvm-mca/Scheduler.cpp | diffblobblamehistory |