[llvm] [AMDGPU][WIP] Optimize SGPR spills (PR #93668)

[Christudasan Devadasan via llvm-commits]

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@@ -278,15 +278,16 @@ void SILowerSGPRSpills::extendWWMVirtRegLiveness(MachineFunction &MF,
   for (auto Reg : MFI->getSGPRSpillVGPRs()) {
     for (MachineBasicBlock *SaveBlock : SaveBlocks) {
       MachineBasicBlock::iterator InsertBefore = SaveBlock->begin();
+
       DebugLoc DL = SaveBlock->findDebugLoc(InsertBefore);
       auto MIB = BuildMI(*SaveBlock, InsertBefore, DL,
                          TII->get(AMDGPU::IMPLICIT_DEF), Reg);
       MFI->setFlag(Reg, AMDGPU::VirtRegFlag::WWM_REG);
       // Set SGPR_SPILL asm printer flag
       MIB->setAsmPrinterFlag(AMDGPU::SGPR_SPILL);
-      if (LIS) {
+
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cdevadas wrote:

Ditto.

https://github.com/llvm/llvm-project/pull/93668