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| author | Carol Eidt <carol.eidt@microsoft.com> | 2018-09-21 15:44:01 -0700 |
|---|---|---|
| committer | Carol Eidt <carol.eidt@microsoft.com> | 2018-09-21 15:44:01 -0700 |
| commit | 649d6653ca36f39cfa50cdd92c9efc7f319e24bc (patch) | |
| tree | 5a7f55f392901cc28521a59d344f9d8ad1defdec /src/jit/gentree.h | |
| parent | 4d65684d041045edd46c9523b6b51e6e17f560f4 (diff) | |
| download | coreclr-649d6653ca36f39cfa50cdd92c9efc7f319e24bc.tar.gz coreclr-649d6653ca36f39cfa50cdd92c9efc7f319e24bc.tar.bz2 coreclr-649d6653ca36f39cfa50cdd92c9efc7f319e24bc.zip | |
PR feedback: clarify that COPY/RELOAD can have register holes.
Diffstat (limited to 'src/jit/gentree.h')
| -rw-r--r-- | src/jit/gentree.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/jit/gentree.h b/src/jit/gentree.h index a0c86fbfbc..7489340a8d 100644 --- a/src/jit/gentree.h +++ b/src/jit/gentree.h @@ -5539,6 +5539,10 @@ struct GenTreeCopyOrReload : public GenTreeUnOp // We need to return the highest index for which we have a valid register. // Note that the gtOtherRegs array is off by one (the 0th register is gtRegNum). // If there's no valid register in gtOtherRegs, gtRegNum must be valid. + // Note that for most nodes, the set of valid registers must be contiguous, + // but for COPY or RELOAD there is only a valid register for the register positions + // that must be copied or reloaded. + // for (unsigned i = MAX_RET_REG_COUNT; i > 1; i--) { if (gtOtherRegs[i - 2] != REG_NA) |