[llvm] 3f8a2af - Slightly speculative buildbot fix for issue reported in 8293f74 commit thread

[Philip Reames via llvm-commits]

Author: Philip Reames
Date: 2019-11-22T11:37:17-08:00
New Revision: 3f8a2af8f43faf6da15070108ceeacb9a5d2c42b

URL: https://github.com/llvm/llvm-project/commit/3f8a2af8f43faf6da15070108ceeacb9a5d2c42b
DIFF: https://github.com/llvm/llvm-project/commit/3f8a2af8f43faf6da15070108ceeacb9a5d2c42b.diff

LOG: Slightly speculative buildbot fix for issue reported in 8293f74 commit thread

Added: 
    

Modified: 
    llvm/lib/Analysis/GuardUtils.cpp

Removed: 
    


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diff  --git a/llvm/lib/Analysis/GuardUtils.cpp b/llvm/lib/Analysis/GuardUtils.cpp
index 18141069f6a4..d48283279858 100644
--- a/llvm/lib/Analysis/GuardUtils.cpp
+++ b/llvm/lib/Analysis/GuardUtils.cpp
@@ -84,7 +84,10 @@ bool llvm::parseWidenableBranch(User *U, Use *&C,Use *&WC,
   Value *A, *B;
   if (!match(Cond, m_And(m_Value(A), m_Value(B))))
     return false;
-  auto *And = cast<Instruction>(Cond);
+  auto *And = dyn_cast<Instruction>(Cond);
+  if (!And)
+    // Could be a constexpr
+    return false;
   
   if (match(A, m_Intrinsic<Intrinsic::experimental_widenable_condition>()) &&
       A->hasOneUse()) {