[flang-commits] [flang] [flang][fir] Lower `do concurrent` loop nests to `fir.do_concurrent` (PR #132904)

[Kareem Ergawy via flang-commits]

================
@@ -279,6 +279,9 @@ mlir::Block *fir::FirOpBuilder::getAllocaBlock() {
   if (auto cufKernelOp = getRegion().getParentOfType<cuf::KernelOp>())
     return &cufKernelOp.getRegion().front();
 
+  if (auto doConcurentOp = getRegion().getParentOfType<fir::DoConcurrentOp>())
+    return doConcurentOp.getBody();
----------------
ergawy wrote:

We do this way for the new `fir.do_concurrent` and `fir.do_concurrent.loop` ops to keep all info related to the loop nest closely located in the IR. The allocations needed here are for the nest iteration variables. See: https://discourse.llvm.org/t/modeling-do-concurrent-loops-in-the-fir-dialect/84950/6?u=bob.belcher and related discussion and https://github.com/llvm/llvm-project/blob/main/flang/include/flang/Optimizer/Dialect/FIROps.td#L3457.

https://github.com/llvm/llvm-project/pull/132904