[llvm] [llvm][InstCombine] bitcast bfloat half castpair bug (PR #79832)

[Nikita Popov via llvm-commits]

================
@@ -3164,7 +3164,7 @@ unsigned CastInst::isEliminableCastPair(
     { 99,99,99, 2, 2,99,99, 8, 2,99,99, 4, 0}, // FPExt          |
     {  1, 0, 0,99,99, 0, 0,99,99,99, 7, 3, 0}, // PtrToInt       |
     { 99,99,99,99,99,99,99,99,99,11,99,15, 0}, // IntToPtr       |
-    {  5, 5, 5, 6, 6, 5, 5, 6, 6,16, 5, 1,14}, // BitCast        |
+    {  5, 5, 5, 0, 0, 5, 5, 0, 0,16, 5, 1,14}, // BitCast        |
----------------
nikic wrote:

Can you please also remove case 6 from the below switch?

https://github.com/llvm/llvm-project/pull/79832