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1cbae6c6e8
This commit fixes a regression (from LLVM 10 to LLVM 11 RC3) in the LLVM C API. Previously, commit 1ee6ec2bf removed the mask operand from the ShuffleVector instruction, storing the mask data separately in the instruction instead; this reduced the number of operands of ShuffleVector from 3 to 2. AFAICT, this change unintentionally caused a regression in the LLVM C API. Specifically, it is no longer possible to get the mask of a ShuffleVector instruction through the C API. This patch introduces new functions which together allow a C API user to get the mask of a ShuffleVector instruction, restoring the functionality which was previously available through LLVMGetOperand(). This patch also adds tests for this change to the llvm-c-test executable, which involved adding support for InsertElement, ExtractElement, and ShuffleVector itself (as well as constant vectors) to echo.cpp. Previously, vector operations weren't tested at all in echo.ll. I also fixed some typos in comments and help-text nearby these changes, which I happened to spot while developing this patch. Since the typo fixes are technically unrelated other than being in the same files, I'm happy to take them out if you'd rather they not be included in the patch. Differential Revision: https://reviews.llvm.org/D88190 |
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