[llvm] [GISel] Add more FP opcodes to CSE (PR #123949)

[Matt Arsenault via llvm-commits]

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@@ -75,6 +75,138 @@ TEST_F(AArch64GISelMITest, TestCSE) {
   auto MIBUnmerge2 = CSEB.buildUnmerge({s32, s32}, Copies[0]);
   EXPECT_TRUE(&*MIBUnmerge == &*MIBUnmerge2);
 
+  // Check G_FADD
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arsenm wrote:

In a cleanup you could use buildInstr and loop over the opcodes, these are all going to behave the same way 

https://github.com/llvm/llvm-project/pull/123949