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numeric_limits::infinity() apparently does not work on all systems. As a

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workaround, use the C HUGE_VAL macro instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13377 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2004-05-06 16:25:59 +00:00
parent ad5c296792
commit a19eedeb7a
2 changed files with 5 additions and 7 deletions
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10
lib/CodeGen/LiveIntervalAnalysis.cpp
View File

@ -196,7 +196,7 @@ void LiveIntervals::updateSpilledInterval(Interval& li,
VirtRegMap& vrm, VirtRegMap& vrm,
int slot) int slot)
{ {
assert(li.weight != std::numeric_limits<float>::infinity() && assert(li.weight != HUGE_VAL &&
"attempt to spill already spilled interval!"); "attempt to spill already spilled interval!");
Interval::Ranges oldRanges; Interval::Ranges oldRanges;
swap(oldRanges, li.ranges); swap(oldRanges, li.ranges);
@ -253,7 +253,7 @@ void LiveIntervals::updateSpilledInterval(Interval& li,
} }
} }
// the new spill weight is now infinity as it cannot be spilled again // the new spill weight is now infinity as it cannot be spilled again
li.weight = std::numeric_limits<float>::infinity(); li.weight = HUGE_VAL;
DEBUG(std::cerr << '\n'); DEBUG(std::cerr << '\n');
DEBUG(std::cerr << "\t\t\t\tupdated interval: " << li << '\n'); DEBUG(std::cerr << "\t\t\t\tupdated interval: " << li << '\n');
} }
@ -556,15 +556,13 @@ LiveIntervals::Interval& LiveIntervals::getOrCreateInterval(unsigned reg)
LiveIntervals::Interval::Interval(unsigned r) LiveIntervals::Interval::Interval(unsigned r)
: reg(r), : reg(r),
weight((MRegisterInfo::isPhysicalRegister(r) ? weight((MRegisterInfo::isPhysicalRegister(r) ? HUGE_VAL : 0.0F))
std::numeric_limits<float>::infinity() : 0.0F))
{ {
} }
bool LiveIntervals::Interval::spilled() const bool LiveIntervals::Interval::spilled() const
{ {
return (weight == std::numeric_limits<float>::infinity() && return (weight == HUGE_VAL &&
MRegisterInfo::isVirtualRegister(reg)); MRegisterInfo::isVirtualRegister(reg));
} }

2
lib/CodeGen/RegAllocLinearScan.cpp
View File

@ -351,7 +351,7 @@ void RA::assignRegOrStackSlotAtInterval(IntervalPtrs::value_type cur)
DEBUG(std::cerr << "\tassigning stack slot at interval "<< *cur << ":\n"); DEBUG(std::cerr << "\tassigning stack slot at interval "<< *cur << ":\n");
float minWeight = std::numeric_limits<float>::infinity(); float minWeight = HUGE_VAL;
unsigned minReg = 0; unsigned minReg = 0;
const TargetRegisterClass* rc = mf_->getSSARegMap()->getRegClass(cur->reg); const TargetRegisterClass* rc = mf_->getSSARegMap()->getRegClass(cur->reg);
for (TargetRegisterClass::iterator i = rc->allocation_order_begin(*mf_); for (TargetRegisterClass::iterator i = rc->allocation_order_begin(*mf_);