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Re-apply r211399, "Generate native unwind info on Win64" with a fix to ignore SEH pseudo ops in X86 JIT emitter.

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--
This patch enables LLVM to emit Win64-native unwind info rather than
DWARF CFI.  It handles all corner cases (I hope), including stack
realignment.

Because the unwind info is not flexible enough to describe stack frames
with a gap of unknown size in the middle, such as the one caused by
stack realignment, I modified register spilling code to place all spills
into the fixed frame slots, so that they can be accessed relative to the
frame pointer.

Patch by Vadim Chugunov!

Reviewed By: rnk

Differential Revision: http://reviews.llvm.org/D4081

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211691 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
NAKAMURA Takumi
2014-06-25 12:41:52 +00:00
parent 2fc4d9923f
commit b720a3d15c
20 changed files with 634 additions and 205 deletions
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10
test/CodeGen/X86/gcc_except_table.ll
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@@ -13,14 +13,14 @@ define i32 @main() uwtable optsize ssp {
; APPLE: GCC_except_table0:
; APPLE: Lexception0:
; MINGW64: .cfi_startproc
; MINGW64: .cfi_personality 0, __gxx_personality_v0
; MINGW64: .cfi_lsda 0, .Lexception0
; MINGW64: .cfi_def_cfa_offset 16
; MINGW64: .seh_proc
; MINGW64: .seh_handler __gxx_personality_v0
; MINGW64: .seh_setframe 5, 0
; MINGW64: callq _Unwind_Resume
; MINGW64: .cfi_endproc
; MINGW64: .seh_handlerdata
; MINGW64: GCC_except_table0:
; MINGW64: Lexception0:
; MINGW64: .seh_endproc
; MINGW32: .cfi_startproc
; MINGW32: .cfi_personality 0, ___gxx_personality_v0