From 3aa75b5fc46aa96ffa5cda601bf2e0caf3f3f5d0 Mon Sep 17 00:00:00 2001
From: Jan Vesely <jan.vesely@rutgers.edu>
Date: Sat, 4 Feb 2017 17:34:56 -0500
Subject: [PATCH 1/1] AMDGPU/R600: Assert on infinite loop in EmitClauseMarkers

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
---
 lib/Target/AMDGPU/R600EmitClauseMarkers.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/Target/AMDGPU/R600EmitClauseMarkers.cpp b/lib/Target/AMDGPU/R600EmitClauseMarkers.cpp
index ceb5870..7bcf88b 100644
--- a/lib/Target/AMDGPU/R600EmitClauseMarkers.cpp
+++ b/lib/Target/AMDGPU/R600EmitClauseMarkers.cpp
@@ -321,9 +321,11 @@ public:
       if (I != MBB.end() && I->getOpcode() == AMDGPU::CF_ALU)
         continue; // BB was already parsed
       for (MachineBasicBlock::iterator E = MBB.end(); I != E;) {
-        if (isALU(*I))
+        if (isALU(*I)) {
+          auto old = I;
           I = MakeALUClause(MBB, I);
-        else
+          assert(old != I);
+        } else
           ++I;
       }
     }
-- 
2.9.3