From 06a368db3975d2105a98a3234fb9145f14ed9c67 Mon Sep 17 00:00:00 2001
From: rain2133 <1370973498@qq.com>
Date: Wed, 13 Aug 2025 20:00:43 +0800
Subject: [PATCH] =?UTF-8?q?[midend]=E4=BF=AE=E5=A4=8D=E5=88=9B=E5=BB=BA?=
 =?UTF-8?q?=E6=96=B0=E5=BD=92=E7=BA=B3=E5=8F=98=E9=87=8F=E7=9A=84=E9=94=99?=
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---
 src/midend/Pass/Optimize/LoopStrengthReduction.cpp | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/midend/Pass/Optimize/LoopStrengthReduction.cpp b/src/midend/Pass/Optimize/LoopStrengthReduction.cpp
index fc306c1..d7e3448 100644
--- a/src/midend/Pass/Optimize/LoopStrengthReduction.cpp
+++ b/src/midend/Pass/Optimize/LoopStrengthReduction.cpp
@@ -614,12 +614,9 @@ bool StrengthReductionContext::createNewInductionVariable(StrengthReductionCandi
     return false;
   }
 
-  // 1. 在循环头创建新的 phi 指令
-  builder->setPosition(header, header->begin());
-  candidate->newPhi = builder->createPhiInst(originalPhi->getType());
-  candidate->newPhi->setName(originalPhi->getName() + "_sr");
+  
 
-  // 2. 找到原始归纳变量的初始值和步长
+  // 1. 找到原始归纳变量的初始值和步长
   Value* initialValue = nullptr;
   Value* stepValue = nullptr;
   BasicBlock* latchBlock = nullptr;
@@ -651,6 +648,11 @@ bool StrengthReductionContext::createNewInductionVariable(StrengthReductionCandi
     return false;
   }
 
+  // 2. 在循环头创建新的 phi 指令
+  builder->setPosition(header, header->begin());
+  candidate->newPhi = builder->createPhiInst(originalPhi->getType());
+  candidate->newPhi->setName(originalPhi->getName() + "_sr");
+
   // 3. 计算新归纳变量的初始值和步长
   // 新IV的初始值 = 原IV初始值 * multiplier
   Value* newInitialValue;