[llvm] [AMDGPU][NFC] Simplify needcopysign logic (PR #75176)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-amdgpu

Author: Jakub Chlanda (jchlanda)

<details>
<summary>Changes</summary>

This was caught by coverity, reported as: `dead_error_condition`.
Since the conditional revolves around `CF`, it is guaranteed to be null in the else clause, hence making the second part of the statement redundant.

---
Full diff: https://github.com/llvm/llvm-project/pull/75176.diff


1 Files Affected:

- (modified) llvm/lib/Target/AMDGPU/AMDGPULibCalls.cpp (+1-2) 


``````````diff
diff --git a/llvm/lib/Target/AMDGPU/AMDGPULibCalls.cpp b/llvm/lib/Target/AMDGPU/AMDGPULibCalls.cpp
index 5c66fd2b180f76..fa354cc13d5007 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPULibCalls.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPULibCalls.cpp
@@ -1051,8 +1051,7 @@ bool AMDGPULibCalls::fold_pow(FPMathOperator *FPOp, IRBuilder<> &B,
                      CF->isNegative();
     } else {
       needlog = true;
-      needcopysign = needabs = FInfo.getId() != AMDGPULibFunc::EI_POWR &&
-                               (!CF || CF->isNegative());
+      needcopysign = needabs = FInfo.getId() != AMDGPULibFunc::EI_POWR;
     }
   } else {
     ConstantDataVector *CDV = dyn_cast<ConstantDataVector>(opr0);

``````````

</details>


https://github.com/llvm/llvm-project/pull/75176