From ac5821395bb8f019032ddf9f2eb4746ceedaf1c3 Mon Sep 17 00:00:00 2001
From: Nikita Popov <nikita.ppv@gmail.com>
Date: Sat, 31 Aug 2019 09:58:50 +0000
Subject: [PATCH] [LVI] Extract solveBlockValueExtractValue(); NFC

Extract this method in preparation for additional extractvalue
support.

llvm-svn: 370575
---
 llvm/lib/Analysis/LazyValueInfo.cpp | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/llvm/lib/Analysis/LazyValueInfo.cpp b/llvm/lib/Analysis/LazyValueInfo.cpp
index 6c6fe87..bfe9aed 100644
--- a/llvm/lib/Analysis/LazyValueInfo.cpp
+++ b/llvm/lib/Analysis/LazyValueInfo.cpp
@@ -434,6 +434,8 @@ namespace {
       ValueLatticeElement &BBLV, WithOverflowInst *WO, BasicBlock *BB);
   bool solveBlockValueIntrinsic(ValueLatticeElement &BBLV, IntrinsicInst *II,
                                 BasicBlock *BB);
+  bool solveBlockValueExtractValue(ValueLatticeElement &BBLV,
+                                   ExtractValueInst *EVI, BasicBlock *BB);
   void intersectAssumeOrGuardBlockValueConstantRange(Value *Val,
                                                      ValueLatticeElement &BBLV,
                                                      Instruction *BBI);
@@ -648,9 +650,7 @@ bool LazyValueInfoImpl::solveBlockValueImpl(ValueLatticeElement &Res,
       return solveBlockValueBinaryOp(Res, BO, BB);
 
     if (auto *EVI = dyn_cast<ExtractValueInst>(BBI))
-      if (auto *WO = dyn_cast<WithOverflowInst>(EVI->getAggregateOperand()))
-        if (EVI->getNumIndices() == 1 && *EVI->idx_begin() == 0)
-          return solveBlockValueOverflowIntrinsic(Res, WO, BB);
+      return solveBlockValueExtractValue(Res, EVI, BB);
 
     if (auto *II = dyn_cast<IntrinsicInst>(BBI))
       return solveBlockValueIntrinsic(Res, II, BB);
@@ -1135,6 +1135,18 @@ bool LazyValueInfoImpl::solveBlockValueIntrinsic(
   }
 }
 
+bool LazyValueInfoImpl::solveBlockValueExtractValue(
+    ValueLatticeElement &BBLV, ExtractValueInst *EVI, BasicBlock *BB) {
+  if (auto *WO = dyn_cast<WithOverflowInst>(EVI->getAggregateOperand()))
+    if (EVI->getNumIndices() == 1 && *EVI->idx_begin() == 0)
+      return solveBlockValueOverflowIntrinsic(BBLV, WO, BB);
+
+  LLVM_DEBUG(dbgs() << " compute BB '" << BB->getName()
+                    << "' - overdefined (unknown extractvalue).\n");
+  BBLV = ValueLatticeElement::getOverdefined();
+  return true;
+}
+
 static ValueLatticeElement getValueFromICmpCondition(Value *Val, ICmpInst *ICI,
                                                      bool isTrueDest) {
   Value *LHS = ICI->getOperand(0);
-- 
2.7.4