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Replace the odd kill# hack with something less fragile.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44434 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2007-11-29 09:49:23 +00:00
parent fd8890dbee
commit c3fc7d9ec9
4 changed files with 22 additions and 18 deletions
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7
include/llvm/CodeGen/LiveInterval.h
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@@ -38,16 +38,18 @@ namespace llvm {
/// contains ~1u,x to indicate that the value # is not used.
/// def - Instruction # of the definition.
/// reg - Source reg iff val# is defined by a copy; zero otherwise.
/// hasPHIKill - One or more of the kills are PHI nodes.
/// kills - Instruction # of the kills. If a kill is an odd #, it means
/// the kill is a phi join point.
struct VNInfo {
unsigned id;
unsigned def;
unsigned reg;
bool hasPHIKill;
SmallVector<unsigned, 4> kills;
VNInfo() : id(~1U), def(~1U), reg(0) {}
VNInfo() : id(~1U), def(~1U), reg(0), hasPHIKill(false) {}
VNInfo(unsigned i, unsigned d, unsigned r)
: id(i), def(d), reg(r) {}
: id(i), def(d), reg(r), hasPHIKill(false) {}
};
/// LiveRange structure - This represents a simple register range in the
@@ -158,6 +160,7 @@ namespace llvm {
void copyValNumInfo(VNInfo *DstValNo, const VNInfo *SrcValNo) {
DstValNo->def = SrcValNo->def;
DstValNo->reg = SrcValNo->reg;
DstValNo->hasPHIKill = SrcValNo->hasPHIKill;
DstValNo->kills = SrcValNo->kills;
}