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regpressure: Fix getMaxUpwardPressureDelta.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157004 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2012-05-17 18:35:05 +00:00
parent 811d9268e4
commit b54ec26b35
1 changed files with 6 additions and 2 deletions
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8
lib/CodeGen/RegisterPressure.cpp
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@ -629,13 +629,17 @@ getMaxUpwardPressureDelta(const MachineInstr *MI, RegPressureDelta &Delta) {
// Generate liveness for uses.
for (unsigned i = 0, e = PhysRegOpers.Uses.size(); i < e; ++i) {
unsigned Reg = PhysRegOpers.Uses[i];
if (!hasRegAlias(Reg, LivePhysRegs, TRI)) {
if (!hasRegAlias(Reg, LivePhysRegs, TRI)
&& (findRegAlias(Reg, PhysRegOpers.Defs, TRI)
== PhysRegOpers.Defs.end())) {
increasePhysRegPressure(Reg);
}
}
for (unsigned i = 0, e = VirtRegOpers.Uses.size(); i < e; ++i) {
unsigned Reg = VirtRegOpers.Uses[i];
if (!LiveVirtRegs.count(Reg)) {
if (!LiveVirtRegs.count(Reg)
&& (std::find(VirtRegOpers.Defs.begin(), VirtRegOpers.Defs.end(), Reg)
!= VirtRegOpers.Defs.end())) {
increaseVirtRegPressure(Reg);
}
}