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| author | Craig Topper <craig.topper@intel.com> | 2020-06-24 19:46:31 -0700 |
|---|---|---|
| committer | Craig Topper <craig.topper@intel.com> | 2020-06-24 20:15:21 -0700 |
| commit | a5041987eddc21d37345d055cb7a51b3eb5ee698 (patch) | |
| tree | 3fc9d35419cb2593c1a12233ee88d367bfecde6f /clang/lib/Frontend/CompilerInvocation.cpp | |
| parent | 6036bf53090e03537f7d06a8daecda84a72a9bc9 (diff) | |
| download | llvm-a5041987eddc21d37345d055cb7a51b3eb5ee698.zip llvm-a5041987eddc21d37345d055cb7a51b3eb5ee698.tar.gz llvm-a5041987eddc21d37345d055cb7a51b3eb5ee698.tar.bz2 | |
[X86] Emit a reg-reg copy for fast isel of vector bitcasts.
Previously we just updated a map and moved on. But it possible
we cached known bits information with the vreg that can be used by
another basic block. If the other basic block has a different view
of the VT these known bits won't make sense.
By emitting a copy we ensure we have different vregs before and
after the bitcast. This prevents the known bits from being used
with the wrong type.
Differential Revision: https://reviews.llvm.org/D82517
Diffstat (limited to 'clang/lib/Frontend/CompilerInvocation.cpp')
0 files changed, 0 insertions, 0 deletions