From: Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com>
Date: Fri, 1 Sep 2017 20:43:20 +0000 (+0000)
Subject: [AMDGPU] Prevent infinite recursion in DAG.computeKnownBits()
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=f3b5f2ad4a2eb9d4814b6daff3da644c531aca49;p=llvm

[AMDGPU] Prevent infinite recursion in DAG.computeKnownBits()

Differential Revision: https://reviews.llvm.org/D37392

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312364 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/AMDGPU/AMDGPUISelLowering.cpp b/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
index 72dc5090e6c..22ca429f1a6 100644
--- a/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
+++ b/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
@@ -3886,8 +3886,8 @@ void AMDGPUTargetLowering::computeKnownBitsForTargetNode(
   case AMDGPUISD::MUL_U24:
   case AMDGPUISD::MUL_I24: {
     KnownBits LHSKnown, RHSKnown;
-    DAG.computeKnownBits(Op.getOperand(0), LHSKnown);
-    DAG.computeKnownBits(Op.getOperand(1), RHSKnown);
+    DAG.computeKnownBits(Op.getOperand(0), LHSKnown, Depth + 1);
+    DAG.computeKnownBits(Op.getOperand(1), RHSKnown, Depth + 1);
 
     unsigned TrailZ = LHSKnown.countMinTrailingZeros() +
                       RHSKnown.countMinTrailingZeros();