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4 Commits

Author SHA1 Message Date
Tim Northover 9a46718378 GlobalISel: produce correct code for signext/zeroext ABI flags. 
We still don't really have an equivalent of "AssertXExt" in DAG, so we don't
exploit the guarantees on the receiving side yet, but this should produce
conservatively correct code on iOS ABIs.

llvm-svn: 282069
 2016-09-21 12:57:45 +00:00
Tim Northover b18ea162df GlobalISel: split aggregates for PCS lowering 
This should match the existing behaviour for passing complicated struct and
array types, in particular HFAs come through like that from Clang.

For C & C++ we still need to somehow support all the weird ABI flags, or at
least those that are present in the IR (signext, byval, ...), and stack-based
parameter passing.

llvm-svn: 281977
 2016-09-20 15:20:36 +00:00
Tim Northover 11a2354670 GlobalISel: use G_TYPE to annotate physregs with a type. 
More preparation for dropping source types from MachineInstrs: regsters coming
out of already-selected code (i.e. non-generic instructions) don't have a type,
but that information is needed so we must add it manually.

This is done via a new G_TYPE instruction.

llvm-svn: 280292
 2016-08-31 21:24:02 +00:00
Tim Northover fe5f89ba14 GlobalISel: rework CallLowering so that it can be used for libcalls too. 
There should be no functional change here, I'm just making the implementation
of "frem" (to libcall) legalization easier for a followup.

llvm-svn: 279987
 2016-08-29 19:07:08 +00:00