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from cd41a78 Fix an assert in SelectionDAGBuilder when processing inline asm new c8f8f9c Debug Info: Don't emit bitfields in the DWARF4 format when tu [...] new 547f114 X86: Avoid using _chkstk when lowering WIN_ALLOCA instructions

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Summary of changes: lib/CodeGen/AsmPrinter/DwarfUnit.cpp | 17 +- lib/Target/X86/CMakeLists.txt | 1 + lib/Target/X86/X86.h | 3 + lib/Target/X86/X86ISelLowering.cpp | 23 +-- lib/Target/X86/X86ISelLowering.h | 3 - lib/Target/X86/X86InstrCompiler.td | 33 ++-- lib/Target/X86/X86InstrInfo.td | 6 +- lib/Target/X86/X86MachineFunctionInfo.h | 6 + lib/Target/X86/X86TargetMachine.cpp | 1 + lib/Target/X86/X86WinAllocaExpander.cpp | 294 ++++++++++++++++++++++++++++ test/CodeGen/X86/cleanuppad-inalloca.ll | 4 +- test/CodeGen/X86/dynamic-alloca-in-entry.ll | 2 +- test/CodeGen/X86/inalloca-ctor.ll | 4 +- test/CodeGen/X86/inalloca-invoke.ll | 3 +- test/CodeGen/X86/inalloca-stdcall.ll | 4 +- test/CodeGen/X86/inalloca.ll | 12 +- test/CodeGen/X86/shrink-wrap-chkstk.ll | 4 +- test/CodeGen/X86/win-alloca-expander.ll | 153 +++++++++++++++ test/DebugInfo/ARM/big-endian-bitfield.ll | 2 +- test/DebugInfo/X86/bitfields-dwarf4.ll | 3 + 20 files changed, 517 insertions(+), 61 deletions(-) create mode 100644 lib/Target/X86/X86WinAllocaExpander.cpp create mode 100644 test/CodeGen/X86/win-alloca-expander.ll