[LV] Optimize FindLast recurrences to FindIV (NFCI). (#177870)
This patch restructures Find(First|Last)IV handling. Instead of
differentiating between FindLast, FindFirstIV and FindLastIV up front,
this patch simplifies the logic in IVDescriptor to just identify the
FindLast pattern up-front.
It then adds a new VPlan transformation to optimize FindLast reductions
to FindIV reductions if there is a suitable sentinel value.
Find(Last|First)IV recurrence kinds to a single FindIV kind.
This is simpler and more accurate, given selecting the first/last
induction of the final IV reduction is directly controlled by the
corresponding recurrence kind of the ComputeReductionResult.
The new structure also allows further optimizations, like vectorizing
FindLastIV with another boolean reduction that tracks if the condition
in the loop was ever true, if there is no suitable sentinel value.
PR: https://github.com/llvm/llvm-project/pull/177870
[CIR] Add TargetLowering pass (#179245)
This patch adds a new TargetLowering pass to the CIR pipeline. The new
pass is run immediately before CXXABILowering. This new pass does not
perform any heavy transformations yet -- for now it only converts sync
scopes attached to load and store operations according to the target
info, which was done in the LLVM lowering pass.
Related to #175968 .
[lldb-dap] Fix flaky TestDAP_stopped_events.py (#179689)
We are waiting for both stopped event at once.
We may not get both events within the (0.25 seconds) time interval to
fetch more events. Retry with the `DEFAULT TIMEOUT` if we got one of the
event.
Increase the `EVENT_QUIET_PERIOD`'s value for ASAN mode
Fixes #179648
IR: Promote "denormal-fp-math" to a first class attribute (#174293)
Convert "denormal-fp-math" and "denormal-fp-math-f32" into a first
class denormal_fpenv attribute. Previously the query for the effective
denormal mode involved two string attribute queries with parsing. I'm
introducing more uses of this, so it makes sense to convert this
to a more efficient encoding. The old representation was also awkward
since it was split across two separate attributes. The new encoding
just stores the default and float modes as bitfields, largely avoiding
the need to consider if the other mode is set.
The syntax in the common cases looks like this:
`denormal_fpenv(preservesign,preservesign)`
`denormal_fpenv(float: preservesign,preservesign)`
`denormal_fpenv(dynamic,dynamic float: preservesign,preservesign)`
I wasn't sure about reusing the float type name instead of adding a
new keyword. It's parsed as a type but only accepts float. I'm also
debating switching the name to subnormal to match the current
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[LLVM][CodeGen][DirectX] Fix scalarisation when vector ConstantFP is used. (#172684)
When using -use-constant-fp-for-fixed-length-splat `splat (float C)`
becomes ConstantFP(C) rather than ConstantVector(C, C, C...).
[SystemZ][z/OS] Support both EBCDIC & ASCII form of type_info::name() (#179687)
On z/OS, typename is stored as 2 encodings: EBCDIC (default system
encoding) followed by ASCII.
[DebugInfo] Add macro tracking support to DebugInfoFinder
Extend DebugInfoFinder to collect and expose macro debug information
(DIMacro and DIMacroFile nodes).
Also update ModuleDebugInfoPrinter to display macro information including
the macro type, name, value, and source location.
[AMDGPU][PromoteAlloca] Set !amdgpu.non.volatile if promotion fails
I thought about doing this in a separate pass, but this pass already has all the necessary analysis for this to be a trivial addition.
We can simply set `!amdgpu.non.volatile` if all other attempts to promote the operation failed.
