3 Commits

Author	SHA1	Message	Date
Craig Topper	70a64fe7b1	[RISCV] Remove support for the unratified Zbt extension. ... This extension does not appear to be on its way to ratification. Out of the unratified bitmanip extensions, this one had the largest impact on the compiler. Posting this patch to start a discussion about whether we should remove these extensions. We'll talk more at the RISC-V sync meeting this Thursday. Reviewed By: asb, reames Differential Revision: https://reviews.llvm.org/D133834	2022-09-20 20:26:48 -07:00
Michael Munday	4ab0f51a75	Recommit "[RISCV] Legalize select when Zbt extension available" ... This recommits 71ed4b6ce57d8843ef705af8f98305976a8f107a with the polarity of some of the pattern corrected. Original commit message: The custom expansion of select operations in the RISC-V backend interferes with the matching of cmov instructions. Legalizing select when the Zbt extension is available solves that problem. Reviewed By: luismarques, craig.topper Differential Revision: https://reviews.llvm.org/D93767	2021-01-21 12:07:44 -08:00
Michael Munday	b42ff9fb03	[RISCV][NFC] Increase test coverage of Zbt extension ... Add Zbt (ternary) extension code generation to the select lowering tests since it can have a significant impact on how select is lowered. While we are here make the neg-abs commands more consistent with the other tests. Reviewed By: lenary Differential Revision: https://reviews.llvm.org/D94798	2021-01-18 17:30:35 +00:00