From 99b534f23d9db2a6ef6a030aeb95e297cb887dd8 Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@gmail.com>
Date: Thu, 13 Dec 2018 12:24:17 +0100
Subject: Restrict ExtractLinearSum to find non-wrapping results.

---
 js/src/jit/RangeAnalysis.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'js')

diff --git a/js/src/jit/RangeAnalysis.cpp b/js/src/jit/RangeAnalysis.cpp
index 95484c249..d64f9b8ca 100644
--- a/js/src/jit/RangeAnalysis.cpp
+++ b/js/src/jit/RangeAnalysis.cpp
@@ -2167,7 +2167,7 @@ RangeAnalysis::analyzeLoopPhi(MBasicBlock* header, LoopIterationBound* loopBound
     if (initial->block()->isMarked())
         return;
 
-    SimpleLinearSum modified = ExtractLinearSum(phi->getLoopBackedgeOperand());
+    SimpleLinearSum modified = ExtractLinearSum(phi->getLoopBackedgeOperand(), MathSpace::Infinite);
 
     if (modified.term != phi || modified.constant == 0)
         return;
-- 
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