SuccessChanges

Summary

  1. Fix warning on unused variable. NFC. (details)
  2. [Clang] Define Fuchsia C++ABI (details)
  3. [PowerPC] folding rlwinm + rlwinm to rlwinm (details)
  4. [MacroFusion] Limit the max fused number as 2 to reduce the dependency (details)
  5. [llvm-strip][MachO] Test llvm-strip --strip-debug (details)
Commit 59312cb0b81ca13f0674dde66b8e87a8d51d4dda by michael.hliao
Fix warning on unused variable. NFC.
The file was modifiedclang/lib/AST/Expr.cpp
Commit 9c3f9b9c12b0f79b74d1d349bbac46cadaca7dbf by phosek
[Clang] Define Fuchsia C++ABI
Currently, it is a modified version of the Itanium ABI, with the only
change being that constructors and destructors return 'this'.
Differential Revision: https://reviews.llvm.org/D70575
The file was modifiedclang/include/clang/Basic/TargetCXXABI.h
The file was modifiedclang/lib/AST/ASTContext.cpp
The file was modifiedclang/lib/CodeGen/ItaniumCXXABI.cpp
The file was modifiedclang/lib/CodeGen/CodeGenModule.cpp
The file was modifiedclang/lib/Basic/Targets/OSTargets.h
The file was modifiedclang/test/CodeGenCXX/constructor-destructor-return-this.cpp
Commit f0ba1aec35d599353b6c5eca8286791b1c410b7c by czhengsz
[PowerPC] folding rlwinm + rlwinm to rlwinm
  For example:
   x3 = rlwinm x3, 27, 5, 31
   x3 = rlwinm x3, 19, 0, 12
can be combined to
   x3 = rlwinm x3, 14, 0, 12
Reviewed by: steven.zhang, lkail
Differential Revision: https://reviews.llvm.org/D70374
The file was addedllvm/test/CodeGen/PowerPC/fold-rlwinm.mir
The file was modifiedllvm/lib/Target/PowerPC/PPCMIPeephole.cpp
The file was modifiedllvm/test/CodeGen/PowerPC/fold-rlwinm-1.ll
Commit d84b320dfd0a7dbedacc287ede5e5bc4c0f113ba by qshanz
[MacroFusion] Limit the max fused number as 2 to reduce the dependency
This is the example:
int foo(int a, int b, int c, int d) {
return a + b + c + d;
}
And this is the Dependency Graph:
+------+       +------+       +------+       +------+
|  A   |       |  B   |       |  C   |       |  D   |
+--+--++       +---+--+       +--+---+       +--+---+
  ^  ^            ^  ^          ^              ^
  |  |            |  |          |              |
  |  |            |  |New1      +--------------+
  |  |            |  |          |
  |  |            |  |       +--+---+
  |  |New2        |  +-------+ ADD1 |
  |  |            |          +--+---+
  |  |            |    Fuse     ^
  |  |            +-------------+
  |  +------------+
  |               |
  |   Fuse     +--+---+
  +----------->+ ADD2 |
  |            +------+
+--+---+
| ADD3 |
+------+
We need also create an artificial edge from ADD1 to A if
https://reviews.llvm.org/D69998 is landed. That will force the Node A
scheduled before the ADD1 and ADD2. But in fact, it is ok to schedule
the Node A in-between ADD3 and ADD2, as ADD3 and ADD2 are NOT a fusion
pair because ADD2 has been matched to ADD1. We are creating these
unnecessary dependency edges that override the heuristics.
Differential Revision: https://reviews.llvm.org/D70066
The file was modifiedllvm/lib/CodeGen/MacroFusion.cpp
The file was modifiedllvm/test/CodeGen/AArch64/macro-fusion.ll
Commit 36663d506e31a43934f10dff5a3020d3aad41ef1 by maskray
[llvm-strip][MachO] Test llvm-strip --strip-debug
Reviewed By: smeenai
Differential Revision: https://reviews.llvm.org/D70995
The file was modifiedllvm/test/tools/llvm-objcopy/MachO/strip-debug.test