[llvm] r312364 - [AMDGPU] Prevent infinite recursion in DAG.computeKnownBits()

[Stanislav Mekhanoshin via llvm-commits]

Author: rampitec
Date: Fri Sep  1 13:43:20 2017
New Revision: 312364

URL: http://llvm.org/viewvc/llvm-project?rev=312364&view=rev
Log:
[AMDGPU] Prevent infinite recursion in DAG.computeKnownBits()

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

Modified:
    llvm/trunk/lib/Target/AMDGPU/AMDGPUISelLowering.cpp

Modified: llvm/trunk/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AMDGPU/AMDGPUISelLowering.cpp?rev=312364&r1=312363&r2=312364&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AMDGPU/AMDGPUISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/AMDGPU/AMDGPUISelLowering.cpp Fri Sep  1 13:43:20 2017
@@ -3886,8 +3886,8 @@ void AMDGPUTargetLowering::computeKnownB
   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();