[PATCH] D82470: [OpenMP][IRBuilder] Support allocas in nested parallel regions

[Johannes Doerfert via Phabricator via cfe-commits]

jdoerfert marked an inline comment as done.
jdoerfert added inline comments.


================
Comment at: llvm/lib/Frontend/OpenMP/OMPIRBuilder.cpp:433
 
-  Builder.SetInsertPoint(OuterFn->getEntryBlock().getFirstNonPHI());
-  AllocaInst *TIDAddr = Builder.CreateAlloca(Int32, nullptr, "tid.addr");
-  AllocaInst *ZeroAddr = Builder.CreateAlloca(Int32, nullptr, "zero.addr");
+  IRBuilder<> AllocaBuilder(AllocaIP.getBlock(), AllocaIP.getPoint());
+
----------------
fghanim wrote:
> jdoerfert wrote:
> > fghanim wrote:
> > > Here and elsewhere: You seem to have forgotten to undo the changes introduced by using a separate `AllocaBuilder`?
> > > 
> > > Also, Nit: before using `AllocaIP`, either add an assert that it is not empty, or alternatively, add logic to just set it to entry block of `outerfn` if it is
> > > Here and elsewhere: You seem to have forgotten to undo the changes introduced by using a separate AllocaBuilder?
> > 
> > I don't get this. These changes are on purpose. 
> Oh, my bad. I assumed that since we now pass `allocaip` to communicate where is the insertion point, using `builder` the way we used to is sufficient, and this was leftover code. So now what purpose does `AllocaBuilder` serve?
1) No switching the IP back and forth in one builder all the time.
2) Showing by the name of the builder directly where the instructions will be created.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D82470/new/

https://reviews.llvm.org/D82470