tree 1adaee1b812fe09f76a7121f7c6273e4c18cd013
parent 23c2f8827b13ef8c72f09f931a70e088c35ccc77
author Fangrui Song <i@maskray.me> 1748315992 -0700
committer Fangrui Song <i@maskray.me> 1748315992 -0700

MCParser: Error when .set reassigns a non-redefinable variable

The conditions in parseAssignmentExpression are conservative. We should
also report an error when a non-redefiniable variable (e.g. .equiv
followed by .set; .weakref followed by .set).

Make MCAsmStreamer::emitLabel call setOffset to make the behavior
similar to MCObjectStreamer. `isUndefined()` can now be replaced with
`isUnset()`.

Additionally, fix an AMDGPU API user (tested by a few tests including
MC/AMDGPU/hsa-v4.s)