| # 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, there are various scenarios to test where the size of the value |
| # needs to reach the expression emitter in LiveDebugValues. However, there are |
| # even more scenarios to consider where the value is in a spill slot, and: |
| # * The value is larger than the variable, the same, or smaller, |
| # * The variable is a normal scalar, or a fragment, |
| # * There is a DW_OP_stack_value in the expression, or not |
| # That gives us twelve situations to consider, and the easiest way to confirm |
| # correctness is to write them all out. The final DWARF expressions to |
| # produce are: |
| # * No stack value, |
| # * Scalar (32 bits), |
| # * Larger value (64 bits) |
| # DW_OP_breg7 RSP-8, DW_OP_deref_size 0x8, DW_OP_stack_value |
| # * Same value (32 bits) |
| # DW_OP_breg7 RSP-8 |
| # * Smaller value (8 bits) |
| # DW_OP_breg7 RSP-8, DW_OP_deref_size 0x1, DW_OP_stack_value |
| # * Fragment (32 bits) |
| # * Larger value (64 bits) |
| # DW_OP_breg7 RSP-8, DW_OP_deref_size 0x8, DW_OP_stack_value, DW_OP_piece 0x4 |
| # * Same value (32 bits) |
| # DW_OP_breg7 RSP-8, DW_OP_piece 0x4 |
| # * Smaller value (8 bits) |
| # DW_OP_breg7 RSP-8, DW_OP_deref_size 0x1, DW_OP_stack_value, DW_OP_piece 0x4 |
| # * Stack value (imagine there was some arithmetic on the stack before the |
| # DW_OP_stack_value opcode), |
| # * Scalar (32 bits), |
| # * Larger value (64 bits) |
| # DW_OP_breg7 RSP-8, DW_OP_deref_size 0x8, DW_OP_stack_value |
| # * Same value (32 bits) |
| # DW_OP_breg7 RSP-8, DW_OP_deref, DW_OP_stack_value |
| # * Smaller value (8 bits) |
| # DW_OP_breg7 RSP-8, DW_OP_deref_size 0x1, DW_OP_stack_value |
| # * Fragment (32 bits) |
| # * Larger value (64 bits) |
| # DW_OP_breg7 RSP-8, DW_OP_deref_size 0x8, DW_OP_stack_value, DW_OP_piece 0x4 |
| # * Same value (32 bits) |
| # DW_OP_breg7 RSP-8, DW_OP_deref_size 0x4, DW_OP_stack_value, DW_OP_piece 0x4 |
| # * Smaller value (8 bits) |
| # DW_OP_breg7 RSP-8, DW_OP_deref_size 0x1, DW_OP_stack_value, DW_OP_piece 0x4 |
| # |
| # The outlier from the pattern is (Stack value, Fragment, Same value size): we |
| # put a DW_OP_deref_size in where a DW_OP_deref could have sufficied. However, |
| # if we used DW_OP_deref, it would force the consumer to derive the deref size |
| # from the DW_OP_piece, which is un-necessarily hard. |
| |
| ## Capture variable num, |
| # CHECK-DAG: ![[VARNUM:[0-9]+]] = !DILocalVariable(name: "flannel", |
| # CHECK-DAG: ![[VARNUM2:[0-9]+]] = !DILocalVariable(name: "shoes", |
| |
| # DWARF: DW_TAG_variable |
| # DWARF-NEXT: DW_AT_location |
| ## Defined in register, spilt to stack. |
| # DWARF-NEXT: DW_OP_breg0 RAX+0, DW_OP_constu 0xff, DW_OP_and, DW_OP_convert (0x00000026) "DW_ATE_signed_8", DW_OP_convert (0x0000002a) "DW_ATE_signed_32", DW_OP_stack_value |
| # DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x1, DW_OP_convert (0x00000026) "DW_ATE_signed_8", DW_OP_convert (0x0000002a) "DW_ATE_signed_32", DW_OP_stack_value |
| ## Defined on stack. |
| # DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x1, DW_OP_convert (0x00000026) "DW_ATE_signed_8", DW_OP_convert (0x0000002a) "DW_ATE_signed_32", DW_OP_stack_value |
| ## DBG_PHI that moves to stack. |
| # DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x1, DW_OP_stack_value |
| ## DBG_PHI of stack with size. |
| # DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x2, DW_OP_stack_value |
| ## Followed by scalar / no-stack-value locations with various sizes. |
| # DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x8, DW_OP_stack_value |
| # DWARF-NEXT: DW_OP_breg7 RSP-8 |
| # DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x1, DW_OP_stack_value |
| ## scalar / stack value with various sizes. |
| # DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x8, DW_OP_lit1, DW_OP_plus, DW_OP_stack_value |
| # DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref, DW_OP_lit1, DW_OP_plus, DW_OP_stack_value |
| # DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x1, DW_OP_lit1, DW_OP_plus, DW_OP_stack_value) |
| # DWARF: DW_AT_name ("flannel") |
| |
| # Variable with fragments. |
| # DWARF: DW_TAG_variable |
| # DWARF-NEXT: DW_AT_location |
| ## Scalar / no-stack-value locations with various sizes. |
| # DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x8, DW_OP_stack_value, DW_OP_piece 0x4 |
| # DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_piece 0x4 |
| # DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x1, DW_OP_stack_value, DW_OP_piece 0x4 |
| ## Scalar / stack value with various sizes. |
| # DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x8, DW_OP_lit1, DW_OP_plus, DW_OP_stack_value, DW_OP_piece 0x4 |
| # DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x4, DW_OP_lit1, DW_OP_plus, DW_OP_stack_value, DW_OP_piece 0x4 |
| # DWARF-NEXT: DW_OP_breg7 RSP-8, DW_OP_deref_size 0x1, DW_OP_lit1, DW_OP_plus, DW_OP_stack_value, DW_OP_piece 0x4) |
| # DWARF: DW_AT_name ("shoes") |
| |
| --- | |
| ; 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 |
| call void @llvm.dbg.value(metadata i32 0, metadata !10, 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} |
| !10 = !DILocalVariable(name: "shoes", scope: !3, type: !11) |
| !11 = !DIBasicType(name: "long", size: 64, encoding: DW_ATE_signed) |
| |
| |
| ... |
| --- |
| name: _ZNSt5dequeIPN4llvm4LoopESaIS2_EE13_M_insert_auxESt15_Deque_iteratorIS2_RS2_PS2_EmRKS2_ |
| alignment: 16 |
| tracksRegLiveness: true |
| debugInstrRef: 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: |
| |
| ;; PART ONE: For this first block of tests, check that information about |
| ;; the size of the value on the stack makes it through to the expression. |
| |
| $al = MOV8ri 0, debug-instr-number 1, debug-location !7 |
| DBG_INSTR_REF !8, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_convert, 8, DW_ATE_signed, DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_stack_value), dbg-instr-ref(1, 0), debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_convert, 8, DW_ATE_signed, |
| ; CHECK-SAME : DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_stack_value), $al |
| |
| MOV8mr $rsp, 1, $noreg, -8, $noreg, renamable $al :: (store 1 into %stack.0) |
| ;; Clobber to force variable location onto stack. We should use a |
| ;; deref_size 1 because the value is smaller than the variable. |
| $al = MOV8ri 0, debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, 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), $rsp |
| |
| ; 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. It should be deref_size 1 again. |
| 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 !8, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_convert, 8, DW_ATE_signed, DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_stack_value), dbg-instr-ref(2, 1000000), debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, 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), $rsp |
| |
| $eax = MOV32ri 0, debug-location !7 |
| |
| ;; How about DBG_PHIs? The size of the value is communicated by the register |
| ;; size, or an extra DBG_PHI operand, and that should feed through into the |
| ;; decision of whether to deref_size or not. |
| |
| DBG_VALUE $noreg, $noreg, !8, !DIExpression(), debug-location !7 |
| ; CHECK: DBG_VALUE $noreg |
| |
| $al = MOV8ri 0, debug-location !7 |
| DBG_PHI $al, 7 |
| |
| MOV32mr $rsp, 1, $noreg, -8, $noreg, renamable $eax :: (store 4 into %stack.0) |
| $eax = MOV32ri 0, debug-location !7 |
| DBG_INSTR_REF !8, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(7, 0), debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 8, DW_OP_minus, DW_OP_deref_size, 1, DW_OP_stack_value), $rsp |
| |
| $eax = MOV32ri 0, debug-location !7 |
| |
| ;; And for when the DBG_PHI specifies a stack size... |
| DBG_PHI %stack.0, 8, 16 |
| DBG_INSTR_REF !8, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(8, 0), debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 8, DW_OP_minus, DW_OP_deref_size, 2, DW_OP_stack_value), $rsp |
| |
| $eax = MOV32ri 0, debug-location !7 |
| DBG_VALUE $noreg, $noreg, !8, !DIExpression(), debug-location !7 |
| ; CHECK: DBG_VALUE $noreg, $noreg |
| DBG_VALUE $noreg, $noreg, !10, !DIExpression(DW_OP_LLVM_fragment, 0, 32), debug-location !7 |
| ; CHECK: DBG_VALUE $noreg, $noreg |
| |
| ;; PART TWO: test the twelve kinds of location expression mentioned in the |
| ;; opening comment of this test, in that order. Please update the opening |
| ;; comment, these lines and the DWARF check lines at the same time. |
| ;; In each test we'll state a location, give it an instruction to cover, |
| ;; and then terminate it. |
| |
| ;; Scalar (32), Large value (64), no stack value, |
| $rax = MOV64ri 0, debug-instr-number 10, debug-location !7 |
| MOV64mr $rsp, 1, $noreg, -8, $noreg, renamable $rax :: (store 8 into %stack.0) |
| $rax = MOV64ri 0, debug-location !7 |
| DBG_INSTR_REF !8, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(10, 0), debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 8, DW_OP_minus, DW_OP_deref_size, 8, DW_OP_stack_value), $rsp |
| $eax = MOV32ri 0, debug-location !7 |
| DBG_VALUE $noreg, $noreg, !8, !DIExpression(), debug-location !7 |
| ; CHECK: DBG_VALUE $noreg, $noreg |
| |
| ;; Scalar (32), Same value size (32), no stack value, |
| $eax = MOV32ri 0, debug-instr-number 11, debug-location !7 |
| MOV32mr $rsp, 1, $noreg, -8, $noreg, renamable $eax :: (store 4 into %stack.0) |
| $rax = MOV64ri 0, debug-location !7 |
| DBG_INSTR_REF !8, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(11, 0), debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 8, DW_OP_minus, DW_OP_deref), $rsp |
| $eax = MOV32ri 0, debug-location !7 |
| DBG_VALUE $noreg, $noreg, !8, !DIExpression(), debug-location !7 |
| ; CHECK: DBG_VALUE $noreg, $noreg |
| |
| ;; Scalar (32), Smaller value (8), no stack value, |
| $al = MOV8ri 0, debug-instr-number 12, debug-location !7 |
| MOV8mr $rsp, 1, $noreg, -8, $noreg, renamable $al :: (store 1 into %stack.0) |
| $rax = MOV64ri 0, debug-location !7 |
| DBG_INSTR_REF !8, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(12, 0), debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 8, DW_OP_minus, DW_OP_deref_size, 1, DW_OP_stack_value), $rsp |
| $eax = MOV32ri 0, debug-location !7 |
| DBG_VALUE $noreg, $noreg, !8, !DIExpression(), debug-location !7 |
| ; CHECK: DBG_VALUE $noreg, $noreg |
| |
| ;; Fragment (32), Larger value (64), no stack value, |
| $rax = MOV64ri 0, debug-instr-number 13, debug-location !7 |
| MOV64mr $rsp, 1, $noreg, -8, $noreg, renamable $rax :: (store 8 into %stack.0) |
| $rax = MOV64ri 0, debug-location !7 |
| DBG_INSTR_REF !10, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_fragment, 0, 32), dbg-instr-ref(13, 0), debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM2]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 8, DW_OP_minus, DW_OP_deref_size, 8, DW_OP_stack_value, DW_OP_LLVM_fragment, 0, 32), $rsp |
| $eax = MOV32ri 0, debug-location !7 |
| DBG_VALUE $noreg, $noreg, !10, !DIExpression(DW_OP_LLVM_fragment, 0, 32), debug-location !7 |
| ; CHECK: DBG_VALUE $noreg, $noreg |
| |
| ;; Fragment (32), Same value size (32), no stack value, |
| $eax = MOV32ri 0, debug-instr-number 14, debug-location !7 |
| MOV32mr $rsp, 1, $noreg, -8, $noreg, renamable $eax :: (store 4 into %stack.0) |
| $rax = MOV64ri 0, debug-location !7 |
| DBG_INSTR_REF !10, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_fragment, 0, 32), dbg-instr-ref(14, 0), debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM2]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 8, DW_OP_minus, DW_OP_deref, DW_OP_LLVM_fragment, 0, 32), $rsp |
| $eax = MOV32ri 0, debug-location !7 |
| DBG_VALUE $noreg, $noreg, !10, !DIExpression(DW_OP_LLVM_fragment, 0, 32), debug-location !7 |
| ; CHECK: DBG_VALUE $noreg, $noreg |
| |
| ;; Fragment (32), Smaller value (8), no stack value, |
| $al = MOV8ri 0, debug-instr-number 15, debug-location !7 |
| MOV8mr $rsp, 1, $noreg, -8, $noreg, renamable $al :: (store 1 into %stack.0) |
| $rax = MOV64ri 0, debug-location !7 |
| DBG_INSTR_REF !10, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_fragment, 0, 32), dbg-instr-ref(15, 0), debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM2]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 8, DW_OP_minus, DW_OP_deref_size, 1, DW_OP_stack_value, DW_OP_LLVM_fragment, 0, 32), $rsp |
| $eax = MOV32ri 0, debug-location !7 |
| DBG_VALUE $noreg, $noreg, !10, !DIExpression(DW_OP_LLVM_fragment, 0, 32), debug-location !7 |
| ; CHECK: DBG_VALUE $noreg, $noreg |
| |
| |
| |
| ;; Scalar (32), Large value (64), with stack value, |
| $rax = MOV64ri 0, debug-instr-number 16, debug-location !7 |
| MOV64mr $rsp, 1, $noreg, -8, $noreg, renamable $rax :: (store 8 into %stack.0) |
| $rax = MOV64ri 0, debug-location !7 |
| DBG_INSTR_REF !8, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 1, DW_OP_plus, DW_OP_stack_value), dbg-instr-ref(16, 0), debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 8, DW_OP_minus, DW_OP_deref_size, 8, DW_OP_constu, 1, DW_OP_plus, DW_OP_stack_value), $rsp |
| $eax = MOV32ri 0, debug-location !7 |
| DBG_VALUE $noreg, $noreg, !8, !DIExpression(), debug-location !7 |
| ; CHECK: DBG_VALUE $noreg, $noreg |
| |
| ;; Scalar (32), Same value size (32), no stack value, |
| $eax = MOV32ri 0, debug-instr-number 17, debug-location !7 |
| MOV32mr $rsp, 1, $noreg, -8, $noreg, renamable $eax :: (store 4 into %stack.0) |
| $rax = MOV64ri 0, debug-location !7 |
| DBG_INSTR_REF !8, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 1, DW_OP_plus, DW_OP_stack_value), dbg-instr-ref(17, 0), debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 8, DW_OP_minus, DW_OP_deref, DW_OP_constu, 1, DW_OP_plus, DW_OP_stack_value), $rsp |
| $eax = MOV32ri 0, debug-location !7 |
| DBG_VALUE $noreg, $noreg, !8, !DIExpression(), debug-location !7 |
| ; CHECK: DBG_VALUE $noreg, $noreg |
| |
| ;; Scalar (32), Smaller value (8), no stack value, |
| $al = MOV8ri 0, debug-instr-number 18, debug-location !7 |
| MOV8mr $rsp, 1, $noreg, -8, $noreg, renamable $al :: (store 1 into %stack.0) |
| $rax = MOV64ri 0, debug-location !7 |
| DBG_INSTR_REF !8, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 1, DW_OP_plus, DW_OP_stack_value), dbg-instr-ref(18, 0), debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 8, DW_OP_minus, DW_OP_deref_size, 1, DW_OP_constu, 1, DW_OP_plus, DW_OP_stack_value), $rsp |
| $eax = MOV32ri 0, debug-location !7 |
| DBG_VALUE $noreg, $noreg, !8, !DIExpression(), debug-location !7 |
| ; CHECK: DBG_VALUE $noreg, $noreg |
| |
| ;; Fragment (32), Larger value (64), no stack value, |
| $rax = MOV64ri 0, debug-instr-number 19, debug-location !7 |
| MOV64mr $rsp, 1, $noreg, -8, $noreg, renamable $rax :: (store 8 into %stack.0) |
| $rax = MOV64ri 0, debug-location !7 |
| DBG_INSTR_REF !10, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 1, DW_OP_plus, DW_OP_stack_value, DW_OP_LLVM_fragment, 0, 32), dbg-instr-ref(19, 0), debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM2]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 8, DW_OP_minus, DW_OP_deref_size, 8, DW_OP_constu, 1, DW_OP_plus, DW_OP_stack_value, DW_OP_LLVM_fragment, 0, 32), $rsp |
| $eax = MOV32ri 0, debug-location !7 |
| DBG_VALUE $noreg, $noreg, !10, !DIExpression(DW_OP_LLVM_fragment, 0, 32), debug-location !7 |
| ; CHECK: DBG_VALUE $noreg, $noreg |
| |
| ;; Fragment (32), Same value size (32), no stack value, |
| $eax = MOV32ri 0, debug-instr-number 20, debug-location !7 |
| MOV32mr $rsp, 1, $noreg, -8, $noreg, renamable $eax :: (store 4 into %stack.0) |
| $rax = MOV64ri 0, debug-location !7 |
| DBG_INSTR_REF !10, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 1, DW_OP_plus, DW_OP_stack_value, DW_OP_LLVM_fragment, 0, 32), dbg-instr-ref(20, 0), debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM2]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 8, DW_OP_minus, DW_OP_deref_size, 4, DW_OP_constu, 1, DW_OP_plus, DW_OP_stack_value, DW_OP_LLVM_fragment, 0, 32), $rsp |
| $eax = MOV32ri 0, debug-location !7 |
| DBG_VALUE $noreg, $noreg, !10, !DIExpression(DW_OP_LLVM_fragment, 0, 32), debug-location !7 |
| ; CHECK: DBG_VALUE $noreg, $noreg |
| |
| ;; Fragment (32), Smaller value (8), no stack value, |
| $al = MOV8ri 0, debug-instr-number 21, debug-location !7 |
| MOV8mr $rsp, 1, $noreg, -8, $noreg, renamable $al :: (store 1 into %stack.0) |
| $rax = MOV64ri 0, debug-location !7 |
| DBG_INSTR_REF !10, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 1, DW_OP_plus, DW_OP_stack_value, DW_OP_LLVM_fragment, 0, 32), dbg-instr-ref(21, 0), debug-location !7 |
| ; CHECK: DBG_VALUE_LIST ![[VARNUM2]], |
| ; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_constu, 8, DW_OP_minus, DW_OP_deref_size, 1, DW_OP_constu, 1, DW_OP_plus, DW_OP_stack_value, DW_OP_LLVM_fragment, 0, 32), $rsp |
| $eax = MOV32ri 0, debug-location !7 |
| DBG_VALUE $noreg, $noreg, !10, !DIExpression(DW_OP_LLVM_fragment, 0, 32), debug-location !7 |
| ; CHECK: DBG_VALUE $noreg, $noreg |
| |
| RET64 0, debug-location !7 |
| ... |
