[llvm] 9412769 - Revert "[RegAlloc] Strengthen asserts in LiveRangeEdit::scanRemattable [nfc]" (#160897)

[via llvm-commits]

Author: Philip Reames
Date: 2025-09-26T07:55:59-07:00
New Revision: 9412769c1e03a928ba83ee24da084e26ca713dbf

URL: https://github.com/llvm/llvm-project/commit/9412769c1e03a928ba83ee24da084e26ca713dbf
DIFF: https://github.com/llvm/llvm-project/commit/9412769c1e03a928ba83ee24da084e26ca713dbf.diff

LOG: Revert "[RegAlloc] Strengthen asserts in LiveRangeEdit::scanRemattable [nfc]" (#160897)

Reverts llvm/llvm-project#160765. Failures on buildbot indicate second
assertion does not in fact hold.

Added: 
    

Modified: 
    llvm/lib/CodeGen/LiveRangeEdit.cpp

Removed: 
    


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diff  --git a/llvm/lib/CodeGen/LiveRangeEdit.cpp b/llvm/lib/CodeGen/LiveRangeEdit.cpp
index 4aeacc332476d..59bc82dc267b5 100644
--- a/llvm/lib/CodeGen/LiveRangeEdit.cpp
+++ b/llvm/lib/CodeGen/LiveRangeEdit.cpp
@@ -75,11 +75,11 @@ void LiveRangeEdit::scanRemattable() {
     Register Original = VRM->getOriginal(getReg());
     LiveInterval &OrigLI = LIS.getInterval(Original);
     VNInfo *OrigVNI = OrigLI.getVNInfoAt(VNI->def);
-    assert(OrigVNI && "Corrupt interval mapping?");
-    if (OrigVNI->isPHIDef())
+    if (!OrigVNI)
       continue;
     MachineInstr *DefMI = LIS.getInstructionFromIndex(OrigVNI->def);
-    assert(DefMI && "Missing instruction for def slot");
+    if (!DefMI)
+      continue;
     if (TII.isReMaterializable(*DefMI))
       Remattable.insert(OrigVNI);
   }