[PATCH] D94355: [Passes] Add relative lookup table converter pass

[Gulfem Savrun Yeniceri via Phabricator via cfe-commits]

gulfem marked 2 inline comments as done.
gulfem added inline comments.


================
Comment at: llvm/include/llvm/CodeGen/BasicTTIImpl.h:390-391
+
+    if (!TM.getTargetTriple().isArch64Bit())
+      return false;
+
----------------
lebedev.ri wrote:
> 1. But all tests are using `x86_64` triple?
> 2. This is somewhat backwards. if the target wants to disable this, it will need to override this function with `return false;`.
1. Although I used `x86_64 triple`, this optimization can be applied to other 64-bit architectures too, because it not target dependent except `isArch64Bit` and `getCodeModel` check.
2. Is there a target that you have in mind that we need to disable this optimization? 
I thought that it makes sense to enable this optimization by default on all the targets that can support it.
In case targets want to disable it, they can override it as you said.
How can we improve the implementation?
If you have suggestions, I'm happy to incorporate that.



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