[llvm] [NVPTX] Lower LLVM masked vector stores to PTX using new sink symbol syntax (PR #159387)

[Matt Arsenault via llvm-commits]

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@@ -810,9 +810,13 @@ class TargetTransformInfo {
   LLVM_ABI AddressingModeKind
   getPreferredAddressingMode(const Loop *L, ScalarEvolution *SE) const;
 
-  /// Return true if the target supports masked store.
+  /// Return true if the target supports masked store. A value of false for
+  /// IsMaskConstant indicates that the mask could either be variable or
+  /// constant. This is for targets that only support masked store with a
+  /// constant mask.
   LLVM_ABI bool isLegalMaskedStore(Type *DataType, Align Alignment,
-                                   unsigned AddressSpace) const;
+                                   unsigned AddressSpace,
+                                   bool IsMaskConstant = false) const;
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arsenm wrote:

Yes, something like that 

https://github.com/llvm/llvm-project/pull/159387