[PATCH] D135403: [RISCV] Verify that policy operands only exist on instructions with tied passthru operands

[Philip Reames via Phabricator via llvm-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG027516553da4: [RISCV] Verify that policy operands only exist on instructions with tied… (authored by reames).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D135403/new/

https://reviews.llvm.org/D135403

Files:
  llvm/lib/Target/RISCV/RISCVInstrInfo.cpp


Index: llvm/lib/Target/RISCV/RISCVInstrInfo.cpp
===================================================================
--- llvm/lib/Target/RISCV/RISCVInstrInfo.cpp
+++ llvm/lib/Target/RISCV/RISCVInstrInfo.cpp
@@ -1266,6 +1266,15 @@
       ErrInfo = "policy operand w/o VL operand?";
       return false;
     }
+
+    // VecPolicy operands can only exist on instructions with passthru/merge
+    // arguments. Note that not all arguments with passthru have vec policy
+    // operands- some instructions have implicit policies.
+    unsigned UseOpIdx;
+    if (!MI.isRegTiedToUseOperand(0, &UseOpIdx)) {
+      ErrInfo = "policy operand w/o tied operand?";
+      return false;
+    }
   }
 
   return true;


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