[CIR] Add ClangIR tests for AVX512VL rotate builtins (prord/prorq) (#173822)
This PR adds missing ClangIR (CIR) test coverage for the 128/256-bit x86
rotate-right builtins used by prord/prorq.
Background
- CIR support for x86 rotate builtins was implemented in
271e99daf0ff860d0ab50c688ba5e0480de78847 ("[CIR] Support x86 builtin
rotate (#169566)").
- Existing CIR tests cover the 512-bit forms
(_mm512_ror_epi32/_mm512_ror_epi64) in
clang/test/CIR/CodeGenBuiltins/X86/avx512f-builtins.c, but there was no
equivalent coverage for the 128/256-bit AVX512VL forms.
What this adds
- Extends clang/test/CIR/CodeGenBuiltins/X86/avx512vl-builtins.c with
unmasked rotate-right tests:
- _mm_ror_epi32 -> llvm.fshr.v4i32
- _mm256_ror_epi32 -> llvm.fshr.v8i32
- _mm_ror_epi64 -> llvm.fshr.v2i64
- _mm256_ror_epi64 -> llvm.fshr.v4i64
- Each test checks:
- CIR emission uses the "fshr" intrinsic with the expected vector
shapes.
- CIR->LLVM lowering and OGCG lowering both produce the expected
@llvm.fshr.* call.
- The first two operands to @llvm.fshr.* are bound and verified to be
the same value (to avoid false positives).
Testing
- build-cir/bin/llvm-lit -sv
clang/test/CIR/CodeGenBuiltins/X86/avx512vl-builtins.c
Refs
- Tracking issue: llvm/llvm-project#167765
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