| Issue |
161904
|
| Summary |
[Codegen] X86 codegen does not generate unpck{h|l}ps instructions for x86-64 CPU target.
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
karthik-senthil
|
For functionally similar LLVM-IR between two cases, it was noticed that X86 codegen does not generate unpck{h|l}ps instructions (for x86-64 cpu target) in one of them -
Case 1 : Scalarized stores with no extracts for GEP index (https://godbolt.org/z/qcqr8f461)
Case 2: Scalarized stores with extracts for GEP index (https://godbolt.org/z/58n95Tv5q) - no unpck{h|l}ps instructions
I would like to confirm if there are any issues with the LLVM-IR for Case 2 that prohibits X86 codegen from generating optimal ASM like Case 1.
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