Disallow IND<struct> except as a source of STORE_DYN_BLK
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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch Issue DetailsNamely, the code which was wrapping temps created for calls. The only case remaining is the "original" wrapping, it will take a bit more work to get rid of it without regressions. Also perform a bit of miscellaneous code cleanup. We're expecting mostly positive diffs, with some regressions from the common sources:
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OBJ(ADDR(...)) wrapping from impNormStructVal
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/azp run runtime-coreclr superpmi-diffs, runtime-coreclr superpmi-replay |
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jakobbotsch
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Allowing for the removal of some
OBJ(ADDR(FIELD))wrapping inimpNormStructValand others.The diffs are expected to be positive: we now allow
FIELD<struct>substitution into struct args. There are a small number of regressions in CG collections that arise due to the fact unused R2R-affectedFIELDcall arguments interact less favorably with HIR DCE thanOBJ(ADDR(FIELD)): the latter would be reduced toADDR(FIELD), which would then null-check the object directly instead of expanding into theNULLCHECK(ADD(obj, IND(...))tree that the compiler cannot remove.