[PATCH] D141189: [Mips] Set setMaxAtomicSizeInBitsSupported

[Brad Smith via Phabricator via llvm-commits]

brad created this revision.
brad added reviewers: atanasyan, sdardis.
brad added a project: LLVM.
Herald added subscribers: jrtc27, hiraditya, arichardson.
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brad requested review of this revision.

Set setMaxAtomicSizeInBitsSupported for Mips. Set the value as appropriate for 64-bit MIPS vs 32-bit and take MIPS-I into consideration.

I am not quite sure if I used the appropriate Subtarget checks.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D141189

Files:
  llvm/lib/Target/Mips/MipsISelLowering.cpp


Index: llvm/lib/Target/Mips/MipsISelLowering.cpp
===================================================================
--- llvm/lib/Target/Mips/MipsISelLowering.cpp
+++ llvm/lib/Target/Mips/MipsISelLowering.cpp
@@ -493,6 +493,13 @@
     setLibcallName(RTLIB::MULO_I128, nullptr);
   }
 
+  if (Subtarget.isGP64bit())
+    setMaxAtomicSizeInBitsSupported(64);
+  else if (Subtarget.hasMips2())
+    setMaxAtomicSizeInBitsSupported(32);
+  else
+    setMaxAtomicSizeInBitsSupported(0);
+
   setMinFunctionAlignment(Subtarget.isGP64bit() ? Align(8) : Align(4));
 
   // The arguments on the stack are defined in terms of 4-byte slots on O32


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