[llvm] [SPARC] Use hardware byteswapper when we have V9 (PR #191720)

[Sergei Barannikov via llvm-commits]

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@@ -3218,13 +3255,109 @@ SDValue SparcTargetLowering::PerformBITCASTCombine(SDNode *N,
   return SDValue();
 }
 
+SDValue SparcTargetLowering::PerformBSWAPCombine(SDNode *N,
+                                                 DAGCombinerInfo &DCI) const {
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s-barannikov wrote:

OTOH, I'm not sure illegally typed loads much further. So maybe combining load+bswap before type legalization (as it happens currently) isn't a bad idea after all. It is just we usually try not to introduce target-specific nodes too early.


https://github.com/llvm/llvm-project/pull/191720