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Exit with nice warnings when register allocator run out of registers.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63267 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2009-01-29 02:20:59 +00:00
parent e5af2d3a22
commit 5a3c6a87b0
5 changed files with 124 additions and 41 deletions
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10
lib/CodeGen/LiveInterval.cpp
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@@ -244,6 +244,16 @@ LiveInterval::addRangeFrom(LiveRange LR, iterator From) {
return ranges.insert(it, LR);
}
/// isInOneLiveRange - Return true if the range specified is entirely in the
/// a single LiveRange of the live interval.
bool LiveInterval::isInOneLiveRange(unsigned Start, unsigned End) {
Ranges::iterator I = std::upper_bound(ranges.begin(), ranges.end(), Start);
if (I == ranges.begin())
return false;
--I;
return I->contains(Start) && I->contains(End-1);
}
/// removeRange - Remove the specified range from this interval. Note that
/// the range must be in a single LiveRange in its entirety.