================
@@ -145,9 +163,88 @@ namespace {
.addImm(0);
if (IsAIX) {
- // The variable offset and region handle are copied in r4 and r3. The
- // copies are followed by GETtlsADDR32AIX/GETtlsADDR64AIX.
- if (!IsTLSTPRelMI) {
+ if (IsTLSLDAIXMI) {
+ // It is better to put TLSLDAIX node before LoadOffsetToc node,
+ // because LoadOffsetToc node can use clobbers r4/r5. Search for
the
+ // first paired LoadOffsetToc node within the same BB.
+ unsigned LDTocOp =
+ Is64Bit ? (IsLargeModel ? PPC::LDtocL : PPC::LDtoc)
+ : (IsLargeModel ? PPC::LWZtocL : PPC::LWZtoc);
+ MachineBasicBlock::iterator Anchor = I;
+ if (!RegInfo.use_empty(OutReg)) {
+ std::set<MachineInstr *> Uses;
+ // Collect all instructions that use OutReg
+ for (MachineOperand &MO : RegInfo.use_operands(OutReg)) {
+ if (Uses.count(MO.getParent()))
+ continue;
+ Uses.insert(MO.getParent());
+ }
+ // Find the first Add within current BB.
----------------
amy-kwan wrote:
```suggestion
// Find the first Add within the current BB.
```
https://github.com/llvm/llvm-project/pull/66316
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