add new target-specific abi0 pass
The general idea is to give abis a chance to talk before we've done all the optimizations. Currently, all targets eliminate {par,arg,ret}{sb,ub,...} during this pass. The forthcoming arm64_apple will, however, insert proper extensions during abi0. Moving forward abis can, for example, lower small-aggregates passing there so that memory optimizations can interact better with function calls.
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7 changed files with 43 additions and 7 deletions
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@ -24,7 +24,8 @@ amd64_memargs(int op)
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.retregs = amd64_sysv_retregs, \
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.argregs = amd64_sysv_argregs, \
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.memargs = amd64_memargs, \
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.abi = amd64_sysv_abi, \
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.abi0 = elimsb, \
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.abi1 = amd64_sysv_abi, \
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.isel = amd64_isel, \
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Target T_amd64_sysv = {
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