[llvm] [GlobalIsel] Combine logic of floating point compares (PR #81886)

[Amara Emerson via llvm-commits]

Thorsten =?utf-8?q?Schütt?= <schuett at gmail.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/81886 at github.com>


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@@ -6814,12 +6815,90 @@ bool CombinerHelper::tryFoldAndOrOrICmpsUsingRanges(GLogicalBinOp *Logic,
   return true;
 }
 
+bool CombinerHelper::tryFoldLogicOfFCmps(GLogicalBinOp *Logic,
+                                         BuildFnTy &MatchInfo) {
+  assert(Logic->getOpcode() != TargetOpcode::G_XOR && "unexpecte xor");
+  Register DestReg = Logic->getReg(0);
+  Register LHS = Logic->getLHSReg();
+  Register RHS = Logic->getRHSReg();
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aemerson wrote:

```suggestion
auto [DestReg, LHS, RHS] = Logic->getFirst3Regs();
```

https://github.com/llvm/llvm-project/pull/81886