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canClobberPhysRegDefs shouldn't called without checking hasPhysRegDefs;

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check this with an assert.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52603 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-06-21 22:05:24 +00:00
parent 95df6b3603
commit 2f1d3108e4
1 changed files with 2 additions and 3 deletions
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5
lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
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@ -1572,15 +1572,14 @@ static bool hasCopyToRegUse(SUnit *SU) {
}
/// canClobberPhysRegDefs - True if SU would clobber one of SuccSU's
/// physical register def.
/// physical register defs.
static bool canClobberPhysRegDefs(SUnit *SuccSU, SUnit *SU,
const TargetInstrInfo *TII,
const TargetRegisterInfo *TRI) {
SDNode *N = SuccSU->Node;
unsigned NumDefs = TII->get(N->getTargetOpcode()).getNumDefs();
const unsigned *ImpDefs = TII->get(N->getTargetOpcode()).getImplicitDefs();
if (!ImpDefs)
return false;
assert(ImpDefs && "Caller should check hasPhysRegDefs");
const unsigned *SUImpDefs =
TII->get(SU->Node->getTargetOpcode()).getImplicitDefs();
if (!SUImpDefs)