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[X86][AArch64][NFC] Simplify querying used argument registers
authorBill Wendling <morbo@google.com>
Thu, 18 Aug 2022 21:52:49 +0000 (14:52 -0700)
committerBill Wendling <morbo@google.com>
Fri, 19 Aug 2022 18:39:05 +0000 (11:39 -0700)
commitac6a0cdc2e85d69ec20fd31d29f30843db0943bd
treea72b0310ceb4e3255818892fe9a72f77635a47f1tree | snapshot
parent20cf170e68def39dc50b59847afb8d9ab445703dcommit | diff
[X86][AArch64][NFC] Simplify querying used argument registers

Registers used for arguments are listed as "live-ins" into the starting
basic block. This means we don't have to go through a potentially
expensive search through all possible argument registers when we only
care about used argument registers.

Differential Revision: https://reviews.llvm.org/D132181
llvm/lib/CodeGen/PrologEpilogInserter.cpp diff | blob | history
Domain: System / Toolchain;