Index: llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h
===================================================================
--- llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h
+++ llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h
@@ -629,6 +629,19 @@
   /// Return true if Idx is a spill machine location.
   bool isSpill(LocIdx Idx) const { return LocIdxToLocID[Idx] >= NumRegs; }
 
+  /// How large is this location (aka, how wide is a value defined there?).
+  unsigned getLocSizeInBits(LocIdx L) const {
+    unsigned ID = LocIdxToLocID[L];
+    if (!isSpill(L)) {
+      return TRI.getRegSizeInBits(Register(ID), MF.getRegInfo());
+    } else {
+      // The slot location on the stack is uninteresting, we care about the
+      // position of the value within the slot (which comes with a size).
+      StackSlotPos Pos = locIDToSpillIdx(ID);
+      return Pos.first;
+   }
+  }
+
   MLocIterator begin() { return MLocIterator(LocIdxToIDNum, 0); }
 
   MLocIterator end() {
Index: llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp
===================================================================
--- llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp
+++ llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp
@@ -854,6 +854,16 @@
     StackSlotPos StackIdx = locIDToSpillIdx(LocID);
     unsigned short Offset = StackIdx.second;
 
+    // The value in this stack slot might not be the same size as the variable
+    // being accessed -- this needs to be encoded in the expression.
+    Optional<unsigned> VariableSize = None;
+    if (Var.getFragment()) {
+      VariableSize = Var.getFragment()->SizeInBits;
+    } else if (auto Size = Var.getVariable()->getSizeInBits()) {
+      VariableSize = *Size;
+    }
+    unsigned ValueSize = getLocSizeInBits(*MLoc);
+
     // TODO: support variables that are located in spill slots, with non-zero
     // offsets from the start of the spill slot. It would require some more
     // complex DIExpression calculations. This doesn't seem to be produced by
@@ -863,19 +873,52 @@
     // the variable is.
     if (Offset == 0) {
       const SpillLoc &Spill = SpillLocs[SpillID.id()];
-      Expr = TRI.prependOffsetExpression(Expr, DIExpression::ApplyOffset,
-                                         Spill.SpillOffset);
       unsigned Base = Spill.SpillBase;
       MIB.addReg(Base);
-      MIB.addImm(0);
 
-      // Being on the stack makes this location indirect; if it was _already_
-      // indirect though, we need to add extra indirection. See this test for
-      // a scenario where this happens:
-      //     llvm/test/DebugInfo/X86/spill-nontrivial-param.ll
-      if (Properties.Indirect) {
-        std::vector<uint64_t> Elts = {dwarf::DW_OP_deref};
-        Expr = DIExpression::append(Expr, Elts);
+      // There are several ways we can dereference things, and several inputs
+      // to consider:
+      // * NRVO variables will appear with IsIndirect set, but should have
+      //   nothing else in their DIExpressions,
+      // * Variables with DW_OP_stack_value in their expr already need an
+      //   explicit dereference of the stack location,
+      // * Values that don't match the variable size need DW_OP_deref_size,
+      // * Everything else can just become a simple location expression.
+
+     if (Properties.Indirect) {
+        // This is something like an NRVO variable, where the pointer has been
+        // spilt to the stack. It should end up being a memory location, with
+        // the pointer to the variable loaded off the stack with a deref:
+        assert(!Expr->isComplex());
+        Expr = TRI.prependOffsetExpression(Expr, DIExpression::ApplyOffset |
+                                           DIExpression::DerefAfter,
+                                           Spill.SpillOffset);
+        MIB.addImm(0);
+      } else if (VariableSize && *VariableSize != ValueSize) {
+        // We're loading a value off the stack that's not the same size as the
+        // variable. Add / subtract stack offset, explicitly deref with a size,
+        // and add DW_OP_stack_value if not already present.
+        assert((ValueSize % 8) == 0);
+        SmallVector<uint64_t, 2> Ops = {dwarf::DW_OP_deref_size, ValueSize / 8};
+        Expr = DIExpression::prependOpcodes(Expr, Ops, true);
+        unsigned Flags = DIExpression::StackValue | DIExpression::ApplyOffset;
+        Expr = TRI.prependOffsetExpression(Expr, Flags, Spill.SpillOffset);
+        MIB.addReg(0);
+    } else if (Expr->isComplex()) {
+        // A variable with no size ambiguity, but with extra elements in it's
+        // expression. Manually dereference the stack location.
+        assert(Expr->isComplex());
+        Expr = TRI.prependOffsetExpression(Expr, DIExpression::ApplyOffset |
+                                           DIExpression::DerefAfter,
+                                           Spill.SpillOffset);
+        MIB.addReg(0);
+      } else {
+        // A plain value that has been spilt to the stack, with no further
+        // context. Request a location expression, marking the DBG_VALUE as
+        // IsIndirect.
+        Expr = TRI.prependOffsetExpression(Expr, DIExpression::ApplyOffset,
+                                           Spill.SpillOffset);
+        MIB.addImm(0);
       }
     } else {
       // This is a stack location with a weird subregister offset: emit an undef
Index: llvm/test/DebugInfo/MIR/InstrRef/deref-spills-with-size.mir
===================================================================
--- /dev/null
+++ llvm/test/DebugInfo/MIR/InstrRef/deref-spills-with-size.mir
@@ -0,0 +1,197 @@
+# RUN: llc %s -o - -experimental-debug-variable-locations=true \
+# RUN:   -run-pass=livedebugvalues \
+# RUN: | FileCheck %s --implicit-check-not=DBG_VALUE
+# RUN: llc %s -o - -experimental-debug-variable-locations=true \
+# RUN:   -start-before=livedebugvalues -filetype=obj \
+# RUN: | llvm-dwarfdump - | FileCheck %s --check-prefix=DWARF
+#
+# LLVM can produce DIExpressions that convert from one value of arbitrary size
+# to another. This is normally fine, however that means the value for a
+# variable tracked in instruction referencing might not be the same size as the
+# variable itself.
+#
+# This becomes a problem when values move onto the stack and we emit
+# DW_OP_deref: there is no information about how large a value the consumer
+# should load from the stack. The convention today appears to be the size of
+# the variable, and as a result if you have a value that's smaller than the
+# variable size, extra information is loaded onto the DWARF expression stack.
+# This then appears as a false variable value to the consumer.
+#
+# In this test, take a 32 bit variable and point it at an 8 bit register, which
+# is then spilt. Ensure that DW_OP_deref_size is used, rather than a plain
+# DW_OP_deref which is open to interpretation.
+#
+## Capture variable num,
+# CHECK: ![[VARNUM:[0-9]+]] = !DILocalVariable
+
+# Checks for DWARF location list up front:
+# DWARF:      DW_TAG_variable
+# DWARF-NEXT: DW_AT_location
+# DWARF-NEXT: DW_OP_breg0 RAX+0, DW_OP_constu 0xff, DW_OP_and,
+# DWARF-SAME:   DW_OP_convert (0x00000026) "DW_ATE_signed_8",
+# DWARF-SAME:   DW_OP_convert (0x0000002a) "DW_ATE_signed_32", DW_OP_stack_value
+# DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x1,
+# DWARF-SAME:   DW_OP_convert (0x00000026) "DW_ATE_signed_8",
+# DWARF-SAME:   DW_OP_convert (0x0000002a) "DW_ATE_signed_32", DW_OP_stack_value
+## First define-on-stack location.
+# DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x1,
+# DWARF-SAME:   DW_OP_convert (0x00000026) "DW_ATE_signed_8",
+# DWARF-SAME:   DW_OP_convert (0x0000002a) "DW_ATE_signed_32", DW_OP_stack_value
+## Tests with meaningless converts, on 32 bit values.
+# DWARF-NEXT: DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and,
+# DWARF-SAME:   DW_OP_convert (0x0000002a) "DW_ATE_signed_32",
+# DWARF-SAME:   DW_OP_convert (0x0000002a) "DW_ATE_signed_32", DW_OP_stack_value
+# DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref,
+# DWARF-SAME:   DW_OP_convert (0x0000002a) "DW_ATE_signed_32",
+# DWARF-SAME:   DW_OP_convert (0x0000002a) "DW_ATE_signed_32", DW_OP_stack_value
+# DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref,
+# DWARF-SAME:   DW_OP_convert (0x0000002a) "DW_ATE_signed_32",
+# DWARF-SAME:   DW_OP_convert (0x0000002a) "DW_ATE_signed_32", DW_OP_stack_value
+## Tests with no DIExpression.
+# DWARF-NEXT: DW_OP_reg0 RAX
+# DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x1, DW_OP_stack_value
+# DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x1, DW_OP_stack_value)
+
+--- |
+  ; ModuleID = 'missingvar.ll'
+  source_filename = "a"
+  target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+  target triple = "x86_64-unknown-linux-gnu"
+  
+  define linkonce_odr void @_ZNSt5dequeIPN4llvm4LoopESaIS2_EE13_M_insert_auxESt15_Deque_iteratorIS2_RS2_PS2_EmRKS2_() local_unnamed_addr align 2 !dbg !3 {
+  entry:
+    call void @llvm.dbg.value(metadata i32 0, metadata !8, metadata !DIExpression()), !dbg !7
+    ret void
+  }
+
+  declare void @llvm.dbg.value(metadata, metadata, metadata)
+  
+  !llvm.module.flags = !{!0, !9}
+  !llvm.dbg.cu = !{!1}
+  
+  !0 = !{i32 2, !"Debug Info Version", i32 3}
+  !1 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "beards", isOptimized: true, runtimeVersion: 4, emissionKind: FullDebug)
+  !2 = !DIFile(filename: "bees.cpp", directory: "")
+  !3 = distinct !DISubprogram(name: "nope", scope: !2, file: !2, line: 1, type: !4, spFlags: DISPFlagDefinition, unit: !1)
+  !4 = !DISubroutineType(types: !5)
+  !5 = !{!6}
+  !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+  !7 = !DILocation(line: 1, scope: !3)
+  !8 = !DILocalVariable(name: "flannel", scope: !3, type: !6)
+  !9 = !{i32 2, !"Dwarf Version", i32 5}
+
+...
+---
+name:            _ZNSt5dequeIPN4llvm4LoopESaIS2_EE13_M_insert_auxESt15_Deque_iteratorIS2_RS2_PS2_EmRKS2_
+alignment:       16
+tracksRegLiveness: true
+liveins:
+  - { reg: '$rdi' }
+  - { reg: '$rsi' }
+  - { reg: '$rdx' }
+frameInfo:
+  stackSize:       48
+  offsetAdjustment: -48
+  maxAlignment:    8
+  maxCallFrameSize: 0
+  cvBytesOfCalleeSavedRegisters: 48
+fixedStack:
+  - { id: 0, type: spill-slot, offset: -56, size: 8, alignment: 8, callee-saved-register: '$rbx' }
+  - { id: 1, type: spill-slot, offset: -48, size: 8, alignment: 16, callee-saved-register: '$r12' }
+  - { id: 2, type: spill-slot, offset: -40, size: 8, alignment: 8, callee-saved-register: '$r13' }
+  - { id: 3, type: spill-slot, offset: -32, size: 8, alignment: 16, callee-saved-register: '$r14' }
+  - { id: 4, type: spill-slot, offset: -24, size: 8, alignment: 8, callee-saved-register: '$r15' }
+  - { id: 5, type: spill-slot, offset: -16, size: 8, alignment: 16, callee-saved-register: '$rbp' }
+stack:
+  - { id: 0, type: spill-slot, offset: -64, size: 8, alignment: 8 }
+machineFunctionInfo: {}
+body:             |
+  bb.0.entry:
+    liveins: $rdi, $rdx, $rsi, $rbp, $r15, $r14, $r13, $r12, $rbx
+  
+    ; CHECK-LABEL: bb.0.entry:
+
+    $al = MOV8ri 0, debug-instr-number 1, debug-location !7
+    DBG_INSTR_REF 1, 0, !8, !DIExpression(DW_OP_LLVM_convert, 8, DW_ATE_signed, DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_stack_value), debug-location !7
+    ; CHECK:      DBG_VALUE $al, $noreg, ![[VARNUM]],
+    ; CHECK-SAME: !DIExpression(DW_OP_LLVM_convert, 8, DW_ATE_signed,
+    ; CHECK-SAME     : DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_stack_value)
+
+    MOV8mr $rsp, 1, $noreg, -8, $noreg, renamable $al :: (store 1 into %stack.0)
+    ; Clobber to force variable location onto stack.
+    $al = MOV8ri 0, debug-location !7
+    ; CHECK:      DBG_VALUE $rsp, $noreg, ![[VARNUM]],
+    ; CHECK-SAME: !DIExpression(DW_OP_constu, 8, DW_OP_minus, 
+    ; CHECK-SAME:     DW_OP_deref_size, 1, DW_OP_LLVM_convert, 8, DW_ATE_signed,
+    ; CHECK-SAME:     DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_stack_value),
+
+    ; Terminate the current variable location,
+    DBG_VALUE $noreg, $noreg, !8, !DIExpression(), debug-location !7
+    ; CHECK: DBG_VALUE $noreg, $noreg, ![[VARNUM]], !DIExpression()
+
+    ; Try again, but with the value originating on the stack, to ensure that
+    ; we can find its size.
+    INC8m $rsp, 1, $noreg, 4, $noreg, implicit-def dead $eflags, debug-instr-number 2, debug-location !7 :: (store (s8) into %stack.0)
+    DBG_INSTR_REF 2, 1000000, !8, !DIExpression(DW_OP_LLVM_convert, 8, DW_ATE_signed, DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_stack_value), debug-location !7
+    ; CHECK:      DBG_VALUE $rsp, $noreg, ![[VARNUM]],
+    ; CHECK-SAME: !DIExpression(DW_OP_constu, 8, DW_OP_minus,
+    ; CHECK-SAME:     DW_OP_deref_size, 1, DW_OP_LLVM_convert, 8, DW_ATE_signed,
+    ; CHECK-SAME:     DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_stack_value),
+
+    ; Just for certainty, let's do it all again but with the correct
+    ; sizes, and ensure they get the right expressions. With a meaningless
+    ; convert from 32 bits to 32 bits baked in.
+
+    $eax = MOV32ri 0, debug-instr-number 3, debug-location !7
+    DBG_INSTR_REF 3, 0, !8, !DIExpression(DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_stack_value), debug-location !7
+    ; CHECK:      DBG_VALUE $eax, $noreg, ![[VARNUM]],
+    ; CHECK-SAME: !DIExpression(DW_OP_LLVM_convert, 32, DW_ATE_signed,
+    ; CHECK-SAME:     DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_stack_value),
+
+    MOV32mr $rsp, 1, $noreg, -8, $noreg, renamable $eax :: (store 4 into %stack.0)
+    ; Clobber to force variable location onto stack.
+    $eax = MOV32ri 0, debug-location !7
+    ; CHECK:      DBG_VALUE $rsp, $noreg, ![[VARNUM]],
+    ; CHECK-SAME: !DIExpression(DW_OP_constu, 8, DW_OP_minus,
+    ; CHECK-SAME:     DW_OP_deref, DW_OP_LLVM_convert, 32, DW_ATE_signed,
+    ; CHECK-SAME:     DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_stack_value),
+
+    DBG_VALUE $noreg, $noreg, !8, !DIExpression(), debug-location !7
+    ; CHECK: DBG_VALUE $noreg, $noreg, ![[VARNUM]], !DIExpression(),
+
+    INC32m $rsp, 1, $noreg, 4, $noreg, implicit-def dead $eflags, debug-instr-number 4, debug-location !7 :: (store (s32) into %stack.0)
+    DBG_INSTR_REF 4, 1000000, !8, !DIExpression(DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_stack_value), debug-location !7
+    ; CHECK:      DBG_VALUE $rsp, $noreg, ![[VARNUM]],
+    ; CHECK-SAME: !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_deref,
+    ; CHECK-SAME:     DW_OP_LLVM_convert, 32, DW_ATE_signed,
+    ; CHECK-SAME:     DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_stack_value),
+
+    ; Repeat again -- this time with no contents in the DIExpression. This test
+    ; that when we switch between a plain register location and a DWARF location
+    ; expression, we add a DW_OP_stack_value. We can't use a non-stack-value
+    ; location expression, because the difference between the variable size and
+    ; the value size will not be described.
+
+    $al = MOV8ri 0, debug-instr-number 5, debug-location !7
+    DBG_INSTR_REF 5, 0, !8, !DIExpression(), debug-location !7
+    ; CHECK:      DBG_VALUE $al, $noreg, ![[VARNUM]], !DIExpression()
+
+    MOV32mr $rsp, 1, $noreg, -8, $noreg, renamable $eax :: (store 4 into %stack.0)
+    ; Clobber to force variable location onto stack.
+    $eax = MOV32ri 0, debug-location !7
+    ; CHECK:      DBG_VALUE $rsp, $noreg, ![[VARNUM]],
+    ; CHECK-SAME: !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_deref_size, 1, DW_OP_stack_value)
+
+    DBG_VALUE $noreg, $noreg, !8, !DIExpression(), debug-location !7
+    ; CHECK: DBG_VALUE $noreg, $noreg, ![[VARNUM]], !DIExpression(),
+
+    ; We can tell from the memory operand that a single-byte value is defined,
+    ; which should be recognised as "variable size doesn't match value size".
+    INC8m $rsp, 1, $noreg, 4, $noreg, implicit-def dead $eflags, debug-instr-number 6, debug-location !7 :: (store (s8) into %stack.0)
+    DBG_INSTR_REF 6, 1000000, !8, !DIExpression(), debug-location !7
+    ; CHECK:      DBG_VALUE $rsp, $noreg, ![[VARNUM]],
+    ; CHECK-SAME: !DIExpression(DW_OP_constu, 8, DW_OP_minus,
+    ; CHECK-SAME:     DW_OP_deref_size, 1, DW_OP_stack_value),
+
+    RET64
+...
Index: llvm/test/DebugInfo/MIR/X86/live-debug-values-restore.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/live-debug-values-restore.mir
+++ llvm/test/DebugInfo/MIR/X86/live-debug-values-restore.mir
@@ -409,15 +409,12 @@
 # This third function tests that complex expressions are spilt, and restored
 # correctly within a basic block.
 
-# FIXME: the spilt location below is wrong, there should be a deref between
-# the spill-offset and the DW_OP_plus_uconst.
-
 # CHECK-LABEL: name: h
 # CHECK-LABEL: bb.0.entry:
 # CHECK:       DBG_VALUE $rdi, $noreg, ![[RVAR]], !DIExpression(DW_OP_plus_uconst, 1)
 # CHECK-LABEL: bb.1.if.then:
 # CHECK:       DBG_VALUE $rdi, $noreg, ![[RVAR]], !DIExpression(DW_OP_plus_uconst, 1)
-# CHECK:       DBG_VALUE $rsp, 0, ![[RVAR]], !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_plus_uconst, 1)
+# CHECK:       DBG_VALUE $rsp, $noreg, ![[RVAR]], !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_deref, DW_OP_plus_uconst, 1)
 # CHECK:       DBG_VALUE $rdi, $noreg, ![[RVAR]], !DIExpression(DW_OP_plus_uconst, 1)
 # CHECK-LABEL: bb.2.if.end:
 # CHECK:       DBG_VALUE $rdi, $noreg, ![[RVAR]], !DIExpression(DW_OP_plus_uconst, 1)
@@ -519,8 +516,6 @@
 # bb 2 and 3, neither of which modifies the stack loc. The exit block (3)
 # should still be tracking the spill, and restore it on stack load.
 
-# FIXME: this test too contains a broken spill location.
-
 # Summary: loc is in $rdi in bb0, spills to stack in bb1, remains in stack
 # in bb2, starts in stack then loaded in bb3.
 
@@ -529,11 +524,11 @@
 # CHECK:       DBG_VALUE $rdi, $noreg, ![[SVAR]], !DIExpression(DW_OP_plus_uconst, 1)
 # CHECK-LABEL: bb.1.foo:
 # CHECK:       DBG_VALUE $rdi, $noreg, ![[SVAR]], !DIExpression(DW_OP_plus_uconst, 1)
-# CHECK:       DBG_VALUE $rsp, 0, ![[SVAR]], !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_plus_uconst, 1)
+# CHECK:       DBG_VALUE $rsp, $noreg, ![[SVAR]], !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_deref, DW_OP_plus_uconst, 1)
 # CHECK-LABEL: bb.2.if.then:
-# CHECK:       DBG_VALUE $rsp, 0, ![[SVAR]], !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_plus_uconst, 1)
+# CHECK:       DBG_VALUE $rsp, $noreg, ![[SVAR]], !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_deref, DW_OP_plus_uconst, 1)
 # CHECK-LABEL: bb.3.if.end
-# CHECK:       DBG_VALUE $rsp, 0, ![[SVAR]], !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_plus_uconst, 1)
+# CHECK:       DBG_VALUE $rsp, $noreg, ![[SVAR]], !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_deref, DW_OP_plus_uconst, 1)
 # CHECK:       DBG_VALUE $rdi, $noreg, ![[SVAR]], !DIExpression(DW_OP_plus_uconst, 1)
 name:            i
 alignment:       16
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_load_in_loop.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_load_in_loop.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_load_in_loop.mir
@@ -52,7 +52,7 @@
   !3 = !{!4}
   !4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
   !5 = distinct !DIGlobalVariable(name: "start", scope: !0, file: !1, line: 4, type: !6, isLocal: false, isDefinition: true)
-  !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+  !6 = !DIBasicType(name: "int", size: 64, encoding: DW_ATE_signed)
   !7 = !{i32 2, !"Dwarf Version", i32 4}
   !8 = !{i32 2, !"Debug Info Version", i32 3}
   !9 = !{i32 1, !"wchar_size", i32 2}