Jasmine Tang
d7a29e5d56
[WebAssembly] Reapply #149461 with correct CondCode in combine of SETCC ( #153703 ) ...
This PR reapplies https://github.com/llvm/llvm-project/pull/149461
In the original `combineVectorSizedSetCCEquality`, the result of setcc
is being negated by returning setcc with the same cond code, leading to
wrong logic.
For example, with
```llvm
%cmp_16 = call i32 @memcmp(ptr %a, ptr %b, i32 16)
%res = icmp eq i32 %cmp_16, 0
```
the original PR producese all_true and then also compares the result
equal to 0 (using the same SETEQ in the returning setcc), meaning that
semantically, it effectively is calling icmp ne.
Instead, the PR should have use SETNE in the returning setcc, this way,
all true return 1, then it is compared again ne 0, which is equivalent
to icmp eq.
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