[PATCH] D65303: [BPI] Adjust the probability for floating point unordered comparison

[Guozhi Wei via Phabricator via llvm-commits]

Carrot added inline comments.


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Comment at: test/CodeGen/SystemZ/call-05.ll:456
 ; CHECK: br %r14
+; CHECK: br %r1
   %fun_a = load volatile void() *, void()** @fun_a;
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scanon wrote:
> I know nothing about Z architecture; is this codegen change actually an improvement? What architectural considerations are at work here?
In this case, the machine code if conversion only considers branch and a target with non trivial probability, the original probability is 3/8, large enough to enable this if conversion. After reducing the probability, if conversion thinks it is too small, not worth the effort to optimize it.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D65303/new/

https://reviews.llvm.org/D65303