diff options
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-10-08 20:20:03 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-10-08 20:20:03 +0000 |
| commit | b7994fedcbcf375ee70b0ad11e1c962c0ccfc1ae (patch) | |
| tree | 5037fa3d841e5db04d7418bf400004a67ae0d0d6 /tools/llvm-objdump/MachODump.cpp | |
| parent | ed744827041a97336461abdc91b43fd0eafb869c (diff) | |
Prevent potential NOREX bug.
A GR8_NOREX virtual register is created when extrating a sub_8bit_hi
sub-register:
%vreg2<def> = COPY %vreg1:sub_8bit_hi; GR8_NOREX:%vreg2 %GR64_ABCD:%vreg1
TEST8ri_NOREX %vreg2, 1, %EFLAGS<imp-def>; GR8_NOREX:%vreg2
If such a live range is ever split, its register class must not be
inflated to GR8. The sub-register copy can only target GR8_NOREX.
I dont have a test case for this theoretical bug.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141500 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'tools/llvm-objdump/MachODump.cpp')
0 files changed, 0 insertions, 0 deletions