Change MIR test to llvm IR test and removed -O2

Author: rastogishubham

llvm/test/DebugInfo/X86/selectionDAG-load-sext.mir renamed to llvm/test/DebugInfo/X86/selectionDAG-load-sext.ll

@@ -1,19 +1,18 @@
-# This test checks that after SelectionDAG runs, it preserves the debug info that is lost due to the DAGCombiner combining a load and a sext instruction, where the #dbg_value is pointing to the result of the load.
+; This test checks that after SelectionDAG runs, it preserves the debug info that is lost due to the DAGCombiner combining a load and a sext instruction, where the #dbg_value is pointing to the result of the load.
 
-# RUN: llc -O2 %s -mtriple=x86_64-unkown-linux -start-before=x86-isel -stop-after=x86-isel -o - | FileCheck %s --check-prefix=MIR
-# RUN: llc -O2 %s -start-before=x86-isel -mtriple=x86_64-unkown-linux --filetype=obj -o %t.o 
-# RUN: llvm-dwarfdump %t.o --name Idx | FileCheck %s --check-prefix=DUMP
+; RUN: llc %s -mtriple=x86_64-unkown-linux -start-before=x86-isel -stop-after=x86-isel -o - | FileCheck %s --check-prefix=MIR
+; RUN: llc -O2 %s -start-before=x86-isel -mtriple=x86_64-unkown-linux --filetype=obj -o %t.o 
+; RUN: llvm-dwarfdump %t.o --name Idx | FileCheck %s --check-prefix=DUMP
 
-# MIR: ![[IDX:[0-9]+]] = !DILocalVariable(name: "Idx"
-# MIR-LABEL: bb.0
-# MIR: %{{[0-9a-f]+}}{{.*}} = MOVSX64rm32 ${{.*}}, 1, $noreg, @GlobArr, $noreg, debug-instr-number [[INSTR_NUM:[0-9]+]]
-# MIR-NEXT: DBG_INSTR_REF ![[IDX]], !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref([[INSTR_NUM]], 0)
-# MIR-NEXT: DBG_INSTR_REF ![[IDX]], !DIExpression(DW_OP_LLVM_arg, 0,  DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_LLVM_convert, 64, DW_ATE_signed), dbg-instr-ref([[INSTR_NUM]], 0)
+; MIR: ![[IDX:[0-9]+]] = !DILocalVariable(name: "Idx"
+; MIR-LABEL: bb.0
+; MIR: %{{[0-9a-f]+}}{{.*}} = MOVSX64rm32 ${{.*}}, 1, $noreg, @GlobArr, $noreg, debug-instr-number [[INSTR_NUM:[0-9]+]]
+; MIR-NEXT: DBG_INSTR_REF ![[IDX]], !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref([[INSTR_NUM]], 0)
+; MIR-NEXT: DBG_INSTR_REF ![[IDX]], !DIExpression(DW_OP_LLVM_arg, 0,  DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_LLVM_convert, 64, DW_ATE_signed), dbg-instr-ref([[INSTR_NUM]], 0)
 
-# DUMP: DW_AT_location	(indexed ({{[0-9a-f]+}}x{{[0-9a-f]+}}) loclist = 0x{{[0-9]+}}: 
-# DUMP-NEXT: [0x{{[0-9a-f]+}}, 0x{{[0-9a-f]+}}): DW_OP_breg0 RAX+0, DW_OP_convert (0x{{[0-9a-f]+}}) "DW_ATE_signed_32", DW_OP_convert (0x{{[0-9a-f]+}}) "DW_ATE_signed_64")
+; DUMP: DW_AT_location	(indexed ({{[0-9a-f]+}}x{{[0-9a-f]+}}) loclist = 0x{{[0-9]+}}: 
+; DUMP-NEXT: [0x{{[0-9a-f]+}}, 0x{{[0-9a-f]+}}): DW_OP_breg0 RAX+0, DW_OP_convert (0x{{[0-9a-f]+}}) "DW_ATE_signed_32", DW_OP_convert (0x{{[0-9a-f]+}}) "DW_ATE_signed_64")
 
---- |
   @GlobArr = dso_local local_unnamed_addr global [5 x i32] [i32 1, i32 1, i32 2, i32 3, i32 5], align 16, !dbg !0
   @__const.main.Data = private unnamed_addr constant [7 x i32] [i32 10, i32 20, i32 30, i32 40, i32 50, i32 60, i32 70], align 16
   define dso_local void @_Z8useValuei(i32 noundef %0) local_unnamed_addr #0 !dbg !22 {