[RISCV] Fix operand number in debug message in RISCVMergeBaseOffset.

This used to print from the ADDI where the operand number was
correct. It recently changed to print from the LUI or AUIPC which
needs to use operand 1 instead of 2.

This shows up as a crash with -debug.

diff --git a/llvm/lib/Target/RISCV/RISCVMergeBaseOffset.cpp b/llvm/lib/Target/RISCV/RISCVMergeBaseOffset.cpp
index 7b2fb9f..d18e2ef 100644 (file)
--- a/llvm/lib/Target/RISCV/RISCVMergeBaseOffset.cpp
+++ b/llvm/lib/Target/RISCV/RISCVMergeBaseOffset.cpp
@@ -426,7 +426,7 @@ bool RISCVMergeBaseOffsetOpt::runOnMachineFunction(MachineFunction &Fn) {
       if (!detectFoldable(Hi, Lo))
         continue;
       LLVM_DEBUG(dbgs() << "  Found lowered global address: "
-                        << *Hi.getOperand(2).getGlobal() << "\n");
+                        << *Hi.getOperand(1).getGlobal() << "\n");
       MadeChange |= detectAndFoldOffset(Hi, *Lo);
       MadeChange |= foldIntoMemoryOps(Hi, *Lo);
     }