[llvm] 4aaf772 - [PeepholeOptimizer] Remove dead code

[Jay Foad via llvm-commits]

Author: Jay Foad
Date: 2020-08-20T16:48:57+01:00
New Revision: 4aaf77254296a3dddbbca416c5adfc3c6d63a0e7

URL: https://github.com/llvm/llvm-project/commit/4aaf77254296a3dddbbca416c5adfc3c6d63a0e7
DIFF: https://github.com/llvm/llvm-project/commit/4aaf77254296a3dddbbca416c5adfc3c6d63a0e7.diff

LOG: [PeepholeOptimizer] Remove dead code

At this point we have already ruled out all def operands, so we can't
possibly see a dead implicit def operand.

Added: 
    

Modified: 
    llvm/lib/CodeGen/PeepholeOptimizer.cpp

Removed: 
    


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diff  --git a/llvm/lib/CodeGen/PeepholeOptimizer.cpp b/llvm/lib/CodeGen/PeepholeOptimizer.cpp
index d55341cd3540..05c843078fb1 100644
--- a/llvm/lib/CodeGen/PeepholeOptimizer.cpp
+++ b/llvm/lib/CodeGen/PeepholeOptimizer.cpp
@@ -1357,9 +1357,6 @@ bool PeepholeOptimizer::foldImmediate(
     MachineOperand &MO = MI.getOperand(i);
     if (!MO.isReg() || MO.isDef())
       continue;
-    // Ignore dead implicit defs.
-    if (MO.isImplicit() && MO.isDead())
-      continue;
     Register Reg = MO.getReg();
     if (!Reg.isVirtual())
       continue;