[llvm] r358890 - AMDGPU: Fix not checking for copy when looking at copy src

[Matt Arsenault via llvm-commits]

Author: arsenm
Date: Mon Apr 22 07:54:39 2019
New Revision: 358890

URL: http://llvm.org/viewvc/llvm-project?rev=358890&view=rev
Log:
AMDGPU: Fix not checking for copy when looking at copy src

Effectively reverts r356956. The check for isFullCopy was excessive,
but there still needs to be a check that this is a copy.

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

Modified: llvm/trunk/lib/Target/AMDGPU/SIOptimizeExecMaskingPreRA.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AMDGPU/SIOptimizeExecMaskingPreRA.cpp?rev=358890&r1=358889&r2=358890&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AMDGPU/SIOptimizeExecMaskingPreRA.cpp (original)
+++ llvm/trunk/lib/Target/AMDGPU/SIOptimizeExecMaskingPreRA.cpp Mon Apr 22 07:54:39 2019
@@ -88,7 +88,12 @@ static bool isEndCF(const MachineInstr&
 }
 
 static bool isFullExecCopy(const MachineInstr& MI) {
-  return MI.getOperand(1).getReg() == AMDGPU::EXEC;
+  if (MI.isCopy() && MI.getOperand(1).getReg() == AMDGPU::EXEC) {
+    assert(MI.isFullCopy());
+    return true;
+  }
+
+  return false;
 }
 
 static unsigned getOrNonExecReg(const MachineInstr &MI,