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Move the segmented stack switch to a function attribute

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This removes the -segmented-stacks command line flag in favor of a
per-function "split-stack" attribute.

Patch by Luqman Aden and Alex Crichton!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205997 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Kleckner
2014-04-10 22:58:43 +00:00
parent ee66766568
commit bc1fd917f0
17 changed files with 136 additions and 94 deletions
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5
lib/CodeGen/MachineFunction.cpp
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@ -123,6 +123,11 @@ getOrCreateJumpTableInfo(unsigned EntryKind) {
return JumpTableInfo;
}
/// Should we be emitting segmented stack stuff for the function
bool MachineFunction::shouldSplitStack() {
return getFunction()->hasFnAttribute("split-stack");
}
/// RenumberBlocks - This discards all of the MachineBasicBlock numbers and
/// recomputes them. This guarantees that the MBB numbers are sequential,
/// dense, and match the ordering of the blocks within the function. If a