[llvm] 2caf64d - [Attributor] Avoid uninitialized memory read.

[Johannes Doerfert via llvm-commits]

Author: Johannes Doerfert
Date: 2023-06-24T00:35:31-07:00
New Revision: 2caf64d562d4d8ecc75a8ae6c5348dbb6f8a5dbc

URL: https://github.com/llvm/llvm-project/commit/2caf64d562d4d8ecc75a8ae6c5348dbb6f8a5dbc
DIFF: https://github.com/llvm/llvm-project/commit/2caf64d562d4d8ecc75a8ae6c5348dbb6f8a5dbc.diff

LOG: [Attributor] Avoid uninitialized memory read.

Added: 
    

Modified: 
    llvm/include/llvm/Transforms/IPO/Attributor.h

Removed: 
    


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diff  --git a/llvm/include/llvm/Transforms/IPO/Attributor.h b/llvm/include/llvm/Transforms/IPO/Attributor.h
index 49fa9f8ad98b5..a532309aa2a7f 100644
--- a/llvm/include/llvm/Transforms/IPO/Attributor.h
+++ b/llvm/include/llvm/Transforms/IPO/Attributor.h
@@ -5795,6 +5795,7 @@ template <Attribute::AttrKind AK>
 bool hasAssumedIRAttr(Attributor &A, const AbstractAttribute &QueryingAA,
                       const IRPosition &IRP, DepClassTy DepClass, bool &IsKnown,
                       bool IgnoreSubsumingPositions = false) {
+  IsKnown = false;
   switch (AK) {
 #define CASE(ATTRNAME, AANAME)                                                 \
   case Attribute::ATTRNAME: {                                                  \