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author | NAKAMURA Takumi <geek4civic@gmail.com> | 2014-06-25 12:41:52 +0000 |
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committer | NAKAMURA Takumi <geek4civic@gmail.com> | 2014-06-25 12:41:52 +0000 |
commit | b720a3d15c0bcd9353237427e1da2e2fee1cb516 (patch) | |
tree | 99c46b916e82d9c5f0be01510c8d368d331bbef6 /lib/CodeGen/MachineFunction.cpp | |
parent | 2fc4d9923f951f331a84f7da0579ceb2cf42c472 (diff) | |
download | llvm-b720a3d15c0bcd9353237427e1da2e2fee1cb516.tar.gz llvm-b720a3d15c0bcd9353237427e1da2e2fee1cb516.tar.bz2 llvm-b720a3d15c0bcd9353237427e1da2e2fee1cb516.tar.xz |
Re-apply r211399, "Generate native unwind info on Win64" with a fix to ignore SEH pseudo ops in X86 JIT emitter.
--
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
Diffstat (limited to 'lib/CodeGen/MachineFunction.cpp')
-rw-r--r-- | lib/CodeGen/MachineFunction.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/lib/CodeGen/MachineFunction.cpp b/lib/CodeGen/MachineFunction.cpp index d432f3deb0..6138aef4ad 100644 --- a/lib/CodeGen/MachineFunction.cpp +++ b/lib/CodeGen/MachineFunction.cpp @@ -578,6 +578,21 @@ int MachineFrameInfo::CreateFixedObject(uint64_t Size, int64_t SPOffset, return -++NumFixedObjects; } +/// CreateFixedSpillStackObject - Create a spill slot at a fixed location +/// on the stack. Returns an index with a negative value. +int MachineFrameInfo::CreateFixedSpillStackObject(uint64_t Size, + int64_t SPOffset) { + unsigned StackAlign = getFrameLowering()->getStackAlignment(); + unsigned Align = MinAlign(SPOffset, StackAlign); + Align = clampStackAlignment(!getFrameLowering()->isStackRealignable() || + !RealignOption, + Align, getFrameLowering()->getStackAlignment()); + Objects.insert(Objects.begin(), StackObject(Size, Align, SPOffset, + /*Immutable*/ true, + /*isSS*/ true, + /*Alloca*/ nullptr)); + return -++NumFixedObjects; +} BitVector MachineFrameInfo::getPristineRegs(const MachineBasicBlock *MBB) const { |