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for the PowerPC target, and factoring the results. This will ease future maintenance of both subtargets. PPCTargetLowering::LowerCall_Darwin_Or_64SVR4() has grown a lot of special-case code for the different ABIs, making maintenance difficult. This is getting worse as we repair errors in the 64-bit ELF ABI implementation, while avoiding changes to the Darwin ABI logic. This patch splits the routine into LowerCall_Darwin() and LowerCall_64SVR4(), allowing both versions to be significantly simplified. I've factored out chunks of similar code where it made sense to do so. I also performed similar factoring on LowerFormalArguments_Darwin() and LowerFormalArguments_64SVR4(). There are no functional changes in this patch, and therefore no new test cases have been developed. Built and tested on powerpc64-unknown-linux-gnu with no new regressions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166480 91177308-0d34-0410-b5e6-96231b3b80d8
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