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allow a virtual register to be associated with live-in values.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21927 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2005-05-13 07:08:07 +00:00
parent fe07581d78
commit 712ad0c36d
3 changed files with 22 additions and 15 deletions
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lib/CodeGen/LiveIntervalAnalysis.cpp
+4 -4
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@@ -95,7 +95,7 @@ bool LiveIntervals::runOnMachineFunction(MachineFunction &fn) {
// beginning of the function that we will pretend "defines" the values. This
// is to make the interval analysis simpler by providing a number.
if (fn.livein_begin() != fn.livein_end()) {
unsigned FirstLiveIn = *fn.livein_begin();
unsigned FirstLiveIn = fn.livein_begin()->first;
// Find a reg class that contains this live in.
const TargetRegisterClass *RC = 0;
@@ -128,11 +128,11 @@ bool LiveIntervals::runOnMachineFunction(MachineFunction &fn) {
// Note intervals due to live-in values.
if (fn.livein_begin() != fn.livein_end()) {
MachineBasicBlock *Entry = fn.begin();
for (MachineFunction::liveinout_iterator I = fn.livein_begin(),
for (MachineFunction::livein_iterator I = fn.livein_begin(),
E = fn.livein_end(); I != E; ++I) {
handlePhysicalRegisterDef(Entry, Entry->begin(),
getOrCreateInterval(*I), 0, 0);
for (const unsigned* AS = mri_->getAliasSet(*I); *AS; ++AS)
getOrCreateInterval(I->first), 0, 0);
for (const unsigned* AS = mri_->getAliasSet(I->first); *AS; ++AS)
handlePhysicalRegisterDef(Entry, Entry->begin(),
getOrCreateInterval(*AS), 0, 0);
}