[llvm] 2dac2c4 - [SimplifyLibCalls] Drop duplicate check (NFC)

[Nikita Popov via llvm-commits]

Author: Nikita Popov
Date: 2022-06-15T09:37:09+02:00
New Revision: 2dac2c4f762f12735987eef6b7c73e984141d0c2

URL: https://github.com/llvm/llvm-project/commit/2dac2c4f762f12735987eef6b7c73e984141d0c2
DIFF: https://github.com/llvm/llvm-project/commit/2dac2c4f762f12735987eef6b7c73e984141d0c2.diff

LOG: [SimplifyLibCalls] Drop duplicate check (NFC)

The same condition already exists inside optimizeMemCmpConstantSize().

Added: 
    

Modified: 
    llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
index 7fa49559d6275..ed695c8351c69 100644
--- a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
@@ -1233,10 +1233,6 @@ Value *LibCallSimplifier::optimizeMemCmpBCmpCommon(CallInst *CI,
   if (!LenC)
     return nullptr;
 
-  // memcmp(d,s,0) -> 0
-  if (LenC->getZExtValue() == 0)
-    return Constant::getNullValue(CI->getType());
-
   if (Value *Res =
           optimizeMemCmpConstantSize(CI, LHS, RHS, LenC->getZExtValue(), B, DL))
     return Res;