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Fix PR3391 and PR3864. Reg allocator infinite looping.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67544 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2009-03-23 18:24:37 +00:00
parent 8cccf0ef0c
commit 2824a65550
4 changed files with 59 additions and 8 deletions
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5
include/llvm/CodeGen/LiveIntervalAnalysis.h
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@@ -367,8 +367,9 @@ namespace llvm {
VirtRegMap &vrm, float& SSWeight);
/// spillPhysRegAroundRegDefsUses - Spill the specified physical register
/// around all defs and uses of the specified interval.
void spillPhysRegAroundRegDefsUses(const LiveInterval &li,
/// around all defs and uses of the specified interval. Return true if it
/// was able to cut its interval.
bool spillPhysRegAroundRegDefsUses(const LiveInterval &li,
unsigned PhysReg, VirtRegMap &vrm);
/// isReMaterializable - Returns true if every definition of MI of every