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R600: Workaround for cayman loop bug

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196121 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vincent Lejeune
2013-12-02 17:29:37 +00:00
parent cce5873de3
commit 7043c7a35e
3 changed files with 46 additions and 0 deletions
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10
lib/Target/R600/R600ControlFlowFinalizer.cpp
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@@ -332,6 +332,7 @@ public:
unsigned MaxStack = 0;
unsigned CurrentStack = 0;
unsigned CurrentLoopDepth = 0;
bool HasPush = false;
for (MachineFunction::iterator MB = MF.begin(), ME = MF.end(); MB != ME;
++MB) {
@@ -370,6 +371,13 @@ public:
CurrentStack++;
MaxStack = std::max(MaxStack, CurrentStack);
HasPush = true;
if (ST.hasCaymanISA() && CurrentLoopDepth > 1) {
BuildMI(MBB, MI, MBB.findDebugLoc(MI), TII->get(AMDGPU::CF_PUSH_CM))
.addImm(CfCount + 1)
.addImm(1);
MI->setDesc(TII->get(AMDGPU::CF_ALU));
CfCount++;
}
case AMDGPU::CF_ALU:
I = MI;
AluClauses.push_back(MakeALUClause(MBB, I));
@@ -378,6 +386,7 @@ public:
break;
case AMDGPU::WHILELOOP: {
CurrentStack+=4;
CurrentLoopDepth++;
MaxStack = std::max(MaxStack, CurrentStack);
MachineInstr *MIb = BuildMI(MBB, MI, MBB.findDebugLoc(MI),
getHWInstrDesc(CF_WHILE_LOOP))
@@ -392,6 +401,7 @@ public:
}
case AMDGPU::ENDLOOP: {
CurrentStack-=4;
CurrentLoopDepth--;
std::pair<unsigned, std::set<MachineInstr *> > Pair =
LoopStack.back();
LoopStack.pop_back();