Hexagon: Remove implicit ilist iterator conversions, NFC
There are two things out of the ordinary in this commit. First, I made
a loop obviously "infinite" in HexagonInstrInfo.cpp. After checking if
an instruction was at the beginning of a basic block (in which case,
`break`), the loop decremented and checked the iterator for `nullptr` as
the loop condition. This has never been possible (the prev pointers are
always been circular, so even with the weird ilist/iplist
implementation, this isn't been possible), so I removed the condition.
Second, in HexagonAsmPrinter.cpp there was another case of comparing a
`MachineBasicBlock::instr_iterator` against `MachineBasicBlock::end()`
(which returns `MachineBasicBlock::iterator`). While not incorrect,
it's fragile. I switched this to `::instr_end()`.
All that said, no functionality change intended here.
llvm-svn: 250778
diff --git a/llvm/lib/Target/Hexagon/HexagonOptimizeSZextends.cpp b/llvm/lib/Target/Hexagon/HexagonOptimizeSZextends.cpp
index cc36052..1723771 100644
--- a/llvm/lib/Target/Hexagon/HexagonOptimizeSZextends.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonOptimizeSZextends.cpp
@@ -84,7 +84,7 @@
(EVT::getEVT(Use->getType())));
++UI;
Use->replaceAllUsesWith(SI);
- Instruction* First = F.getEntryBlock().begin();
+ Instruction* First = &F.getEntryBlock().front();
SI->insertBefore(First);
Use->eraseFromParent();
} else {