Revert "[coroutines] Use DILocation from new storage for hoisted dbg.declare" (#75282)

Reverts #75104

Original commit causes clang to generate invalid IR:
```
mismatched subprogram between llvm.dbg.declare variable and !dbg attachment
  call void @llvm.dbg.declare(metadata ptr %4, metadata !34468, metadata !DIExpression(DW_OP_plus_uconst, 176)), !dbg !34467
```

Author: mizvekov

llvm/lib/Transforms/Coroutines/CoroFrame.cpp

@@ -2891,11 +2891,9 @@ void coro::salvageDebugInfo(
   // dbg.declare does.
   if (isa<DbgDeclareInst>(DVI)) {
     std::optional<BasicBlock::iterator> InsertPt;
-    if (auto *I = dyn_cast<Instruction>(Storage)) {
+    if (auto *I = dyn_cast<Instruction>(Storage))
       InsertPt = I->getInsertionPointAfterDef();
-      if (I->getDebugLoc())
-        DVI->setDebugLoc(I->getDebugLoc());
-    } else if (isa<Argument>(Storage))
+    else if (isa<Argument>(Storage))
       InsertPt = F->getEntryBlock().begin();
     if (InsertPt)
       DVI->moveBefore(*(*InsertPt)->getParent(), *InsertPt);

llvm/test/Transforms/Coroutines/coro-debug-frame-variable.ll

@@ -31,8 +31,8 @@
 ; CHECK:       entry:
 ; CHECK:         %j = alloca i32, align 4
 ; CHECK:         call void @llvm.dbg.declare(metadata ptr %j, metadata ![[JVAR:[0-9]+]], metadata !DIExpression()), !dbg ![[JDBGLOC:[0-9]+]]
-; CHECK:         %[[MEMORY:.*]] = call ptr @new({{.+}}), !dbg ![[IDBGLOC:[0-9]+]]
-; CHECK:         call void @llvm.dbg.declare(metadata ptr %[[MEMORY]], metadata ![[XVAR:[0-9]+]], metadata !DIExpression(DW_OP_plus_uconst, 32)), !dbg ![[IDBGLOC]]
+; CHECK:         %[[MEMORY:.*]] = call ptr @new
+; CHECK:         call void @llvm.dbg.declare(metadata ptr %[[MEMORY]], metadata ![[XVAR:[0-9]+]], metadata !DIExpression(DW_OP_plus_uconst, 32)), !dbg ![[IDBGLOC:[0-9]+]]
 ; CHECK:         call void @llvm.dbg.declare(metadata ptr %[[MEMORY]], metadata ![[IVAR:[0-9]+]], metadata !DIExpression(DW_OP_plus_uconst, 20)), !dbg ![[IDBGLOC]]
 ; CHECK:       await.ready:
 ;
@@ -48,20 +48,18 @@
 ; CHECK:       await.ready:
 ;
 ; CHECK-DAG: ![[IVAR]] = !DILocalVariable(name: "i"
-; CHECK-DAG: ![[PROG_SCOPE:[0-9]+]] = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov"
-; CHECK-DAG: ![[BLK_SCOPE:[0-9]+]] = distinct !DILexicalBlock(scope: ![[PROG_SCOPE]], file: !1, line: 23, column: 12)
-; CHECK-DAG: ![[IDBGLOC]] = !DILocation(line: 23, column: 6, scope: ![[PROG_SCOPE]])
+; CHECK-DAG: ![[SCOPE:[0-9]+]] = distinct !DILexicalBlock(scope: !6, file: !1, line: 23, column: 12)
+; CHECK-DAG: ![[IDBGLOC]] = !DILocation(line: 24, column: 7, scope: ![[SCOPE]])
 ; CHECK-DAG: ![[XVAR]] = !DILocalVariable(name: "x"
 ; CHECK-DAG: ![[JVAR]] = !DILocalVariable(name: "j"
-; CHECK-DAG: ![[JDBGLOC]] = !DILocation(line: 32, column: 7, scope: ![[BLK_SCOPE]])
+; CHECK-DAG: ![[JDBGLOC]] = !DILocation(line: 32, column: 7, scope: ![[SCOPE]])
 
 ; CHECK-DAG: ![[XVAR_RESUME]] = !DILocalVariable(name: "x"
-; CHECK-DAG: ![[RESUME_PROG_SCOPE:[0-9]+]] = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov"
-; CHECK-DAG: ![[IDBGLOC_RESUME]] = !DILocation(line: 24, column: 7, scope: ![[RESUME_BLK_SCOPE:[0-9]+]])
-; CHECK-DAG: ![[RESUME_BLK_SCOPE]] = distinct !DILexicalBlock(scope: ![[RESUME_PROG_SCOPE]], file: !1, line: 23, column: 12)
+; CHECK-DAG: ![[IDBGLOC_RESUME]] = !DILocation(line: 24, column: 7, scope: ![[RESUME_SCOPE:[0-9]+]])
+; CHECK-DAG: ![[RESUME_SCOPE]] = distinct !DILexicalBlock(scope: !22, file: !1, line: 23, column: 12)
 ; CHECK-DAG: ![[IVAR_RESUME]] = !DILocalVariable(name: "i"
 ; CHECK-DAG: ![[JVAR_RESUME]] = !DILocalVariable(name: "j"
-; CHECK-DAG: ![[JDBGLOC_RESUME]] = !DILocation(line: 32, column: 7, scope: ![[RESUME_BLK_SCOPE]])
+; CHECK-DAG: ![[JDBGLOC_RESUME]] = !DILocation(line: 32, column: 7, scope: ![[RESUME_SCOPE]])
 define void @f() presplitcoroutine !dbg !8 {
 entry:
   %__promise = alloca i8, align 8
@@ -73,13 +71,13 @@ entry:
   br i1 %alloc, label %coro.alloc, label %coro.init
 
 coro.alloc:                                       ; preds = %entry
-  %size = call i64 @llvm.coro.size.i64(), !dbg !23
-  %memory = call ptr @new(i64 %size), !dbg !23
-  br label %coro.init, !dbg !23
+  %size = call i64 @llvm.coro.size.i64()
+  %memory = call ptr @new(i64 %size)
+  br label %coro.init
 
 coro.init:                                        ; preds = %coro.alloc, %entry
-  %phi.entry.alloc = phi ptr [ null, %entry ], [ %memory, %coro.alloc ], !dbg !23
-  %begin = call ptr @llvm.coro.begin(token %id, ptr %phi.entry.alloc), !dbg !23
+  %phi.entry.alloc = phi ptr [ null, %entry ], [ %memory, %coro.alloc ]
+  %begin = call ptr @llvm.coro.begin(token %id, ptr %phi.entry.alloc)
   %ready = call i1 @await_ready()
   br i1 %ready, label %init.ready, label %init.suspend
 
@@ -241,4 +239,3 @@ declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg)
 !20 = !DILocation(line: 43, column: 3, scope: !7)
 !21 = !DILocation(line: 43, column: 8, scope: !7)
 !22 = distinct !DILexicalBlock(scope: !8, file: !1, line: 23, column: 12)
-!23 = !DILocation(line: 23, column: 6, scope: !8)