[all-commits] [llvm/llvm-project] 92c62f: [CIR][OpenMP] Implement lowering for the 'num_thre...

[Pedro da Rosa Pinheiro via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 92c62f30ec4a9d9ec9786aa403922fad7d536ae2
      https://github.com/llvm/llvm-project/commit/92c62f30ec4a9d9ec9786aa403922fad7d536ae2
  Author: Pedro da Rosa Pinheiro <pedarosa04 at gmail.com>
  Date:   2026-09-28 (Mon, 28 Sep 2026)

  Changed paths:
    M clang/lib/CIR/CodeGen/CIRGenOpenMPClause.cpp
    M clang/lib/CIR/CodeGen/CIRGenOpenMPClause.h
    M clang/lib/CIR/CodeGen/CIRGenStmtOpenMP.cpp
    M clang/test/CIR/CodeGenOpenMP/parallel.c

  Log Message:
  -----------
  [CIR][OpenMP] Implement lowering for the 'num_threads' clause for 'parallel' directive (#202466)

Implementing the emission of the "single-dimension" `num_threads` clause
for the `#pragma omp parallel` directive. The clause just accepts an
integer value and creates the `numThreadsVars` `llvm::SmallVector` with
that single value (representing a single num_thread dimension).

Based myself off of PR #172501 that implements the lowering for the
`proc_bind` clause.

Following this, I'll work on a PR to adapt CIR to deal with the
"dimensions" modifier introduced in openmp 6.1 (as also tackled by PR
#171767).

### Evidence:
Output of: `python3 build/bin/llvm-lit -sv
clang/test/CIR/CodeGenOpenMP/parallel.c`

```
llvm-lit: /home/pedro/dev/projects/my-llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using clang: /home/pedro/dev/projects/my-llvm-project/build/bin/clang

Testing Time: 0.09s

Total Discovered Tests: 1
  Passed: 1 (100.00%)
```



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