Changes

Summary

[X86] AMX programming model. (details)
[AST] Fix a constexpr-evaluator crash on error-dependent returnstmt. (details)
[gn build] Port f80b29878b0 (details)
[ARM] MVE vcreate tests, for dual lane moves. NFC (details)

Commit f80b29878b0448efb306b9c93c49e5deb9ba2738 by yuanke.luo [X86] AMX programming model. This patch implements amx programming model that discussed in llvm-dev (http://lists.llvm.org/pipermail/llvm-dev/2020-August/144302.html). Thank Hal for the good suggestion in the RA. The fast RA is not in the patch yet. This patch implemeted 7 components. 1. The c interface to end user. 2. The AMX intrinsics in LLVM IR. 3. Transform load/store <256 x i32> to AMX intrinsics or split the type into two <128 x i32>. 4. The Lowering from AMX intrinsics to AMX pseudo instruction. 5. Insert psuedo ldtilecfg and build the def-use between ldtilecfg to amx intruction. 6. The register allocation for tile register. 7. Morph AMX pseudo instruction to AMX real instruction. Change-Id: I935e1080916ffcb72af54c2c83faa8b2e97d5cb0 Differential Revision: https://reviews.llvm.org/D87981
	llvm/test/CodeGen/X86/AMX/amx-type.ll
	llvm/lib/Target/X86/X86ExpandPseudo.cpp
	llvm/include/llvm/IR/IntrinsicsX86.td
	llvm/test/CodeGen/X86/AMX/amx-config.ll
	llvm/test/CodeGen/X86/statepoint-fixup-invoke.mir
	llvm/test/CodeGen/X86/O0-pipeline.ll
	llvm/test/CodeGen/X86/opt-pipeline.ll
	llvm/lib/Target/X86/X86LowerAMXType.cpp
	llvm/test/CodeGen/X86/ipra-reg-usage.ll
	llvm/lib/Target/X86/X86RegisterInfo.cpp
	llvm/test/CodeGen/X86/statepoint-fixup-shared-ehpad.mir
	llvm/lib/Target/X86/X86TargetMachine.cpp
	llvm/include/llvm/CodeGen/LiveRegMatrix.h
	llvm/lib/CodeGen/LiveIntervalUnion.cpp
	llvm/include/llvm/CodeGen/VirtRegMap.h
	llvm/lib/Target/X86/X86InstrInfo.cpp
	llvm/lib/CodeGen/VirtRegMap.cpp
	llvm/lib/Target/X86/X86FrameLowering.cpp
	llvm/lib/Target/X86/X86RegisterInfo.h
	llvm/lib/Target/X86/CMakeLists.txt
	llvm/lib/Target/X86/X86Subtarget.h
	llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
	llvm/lib/Target/X86/X86RegisterInfo.td
	llvm/test/CodeGen/X86/AMX/amx-across-func.ll
	llvm/include/llvm/CodeGen/LiveIntervalUnion.h
	llvm/lib/Target/X86/X86TileConfig.cpp
	llvm/test/CodeGen/X86/AMX/amx-spill.ll
	llvm/include/llvm/CodeGen/TileShapeInfo.h
	clang/include/clang/Basic/BuiltinsX86_64.def
	llvm/lib/Target/X86/X86InstrAMX.td
	llvm/lib/CodeGen/InlineSpiller.cpp
	clang/lib/Headers/amxintrin.h
	llvm/lib/Target/X86/X86ISelLowering.cpp
	clang/test/CodeGen/X86/amx_api.c
	llvm/lib/Target/X86/X86PreTileConfig.cpp
	llvm/include/llvm/CodeGen/Passes.h
	llvm/lib/Target/X86/X86.h
	llvm/include/llvm/IR/Intrinsics.td
	llvm/lib/CodeGen/LiveRegMatrix.cpp
Commit a0539298540e49cb734c7b82f93572ab46bf9b00 by hokein.wu [AST] Fix a constexpr-evaluator crash on error-dependent returnstmt. When the evaluator encounters an error-dependent returnstmt, before this patch it returned a ESR_Returned without setting the result, the callsides think this is a successful execution, and try to access the Result which causes the crash. The fix is to always return failed as we don't know the result of the error-dependent return stmt. Differential Revision: https://reviews.llvm.org/D92969
	clang/test/SemaCXX/constexpr-function-recovery-crash.cpp
	clang/lib/AST/ExprConstant.cpp
Commit 426bee7ad735fc8ca7b2b8a721ce1a8f3cb107bc by llvmgnsyncbot [gn build] Port f80b29878b0
	llvm/utils/gn/secondary/llvm/lib/Target/X86/BUILD.gn
Commit eec5b99901826852f13e11e7f807e175d434f1cd by david.green [ARM] MVE vcreate tests, for dual lane moves. NFC
	llvm/test/CodeGen/Thumb2/mve-vcreate.ll
	llvm/test/CodeGen/Thumb2/mve-pred-constfold.ll