llvm/test/DebugInfo/MIR/InstrRef/memory-operand-folding.mir

# RUN: llc %s -o - -experimental-debug-variable-locations \
# RUN:    -start-before=x86-flags-copy-lowering -stop-after=virtregrewriter \
# RUN:    -mtriple x86_64-unknown-unknown \
# RUN: | FileCheck %s
#
# This test is for stack spill folding -- the SETCC near the start of the MIR
# below show be morphed into an SETCCm by the register allocator, making it
# store to %stack.0. We should track this fact in the substitution table, by
# adding a substitution to the memory-operand operand number.
#
# This is a single operand spill -- there's a separate test for tied def ones.
#
# Ideally this test would be shorter; however, it needs to be sufficiently
# complex to force the register allocator to spill something, so there's a
# limit.
#
# CHECK:      debugValueSubstitutions:
# CHECK-NEXT:  - { srcinst: 1, srcop: 0, dstinst: 2, dstop: 1000000, subreg: 0 }
# CHECK-LABEL: bb.0:
# CHECK: SETCCm %stack.0, {{.*}} debug-instr-number 2
--- |
  target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
  
  define internal fastcc void @beans(i32 %Kind) unnamed_addr align 2 !dbg !7  {
    ret void
  }
   
  !llvm.dbg.cu = !{!0}
  !llvm.module.flags = !{!3, !4, !5}
  !llvm.ident = !{!6}
  
  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
  !1 = !DIFile(filename: "test.c", directory: ".")
  !2 = !{}
  !3 = !{i32 7, !"Dwarf Version", i32 4}
  !4 = !{i32 2, !"Debug Info Version", i32 3}
  !5 = !{i32 1, !"wchar_size", i32 4}
  !6 = !{!"clang"}
  !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
  !8 = !DISubroutineType(types: !9)
  !9 = !{!10, !11, !11}
  !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
  !11 = !DIBasicType(name: "short", size: 16, encoding: DW_ATE_signed)
  !12 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 3, type: !11)
  !13 = !DILocation(line: 0, scope: !7)
  !14 = !DILocalVariable(name: "baz", arg: 2, scope: !7, file: !1, line: 3, type: !11)
  !15 = distinct !DILexicalBlock(scope: !7, file: !1, line: 8, column: 7)


...
---
name:            beans
alignment:       16
tracksRegLiveness: true
registers:
  - { id: 0, class: gr8 }
  - { id: 1, class: gr8 }
  - { id: 2, class: gr8 }
  - { id: 3, class: gr32 }
  - { id: 4, class: gr64 }
  - { id: 5, class: gr8 }
  - { id: 6, class: gr32 }
  - { id: 7, class: gr32 }
  - { id: 8, class: gr32 }
  - { id: 9, class: gr32 }
  - { id: 10, class: gr32 }
  - { id: 11, class: gr64 }
  - { id: 12, class: gr64 }
  - { id: 13, class: gr32 }
  - { id: 14, class: gr8 }
  - { id: 15, class: gr8 }
  - { id: 16, class: gr32 }
  - { id: 17, class: gr64 }
  - { id: 18, class: gr8 }
  - { id: 19, class: gr8 }
  - { id: 20, class: gr32 }
  - { id: 21, class: gr64 }
  - { id: 22, class: gr32 }
  - { id: 23, class: gr32 }
  - { id: 24, class: gr64 }
  - { id: 25, class: gr32 }
  - { id: 26, class: gr64 }
  - { id: 27, class: gr8 }
  - { id: 28, class: gr64_nosp }
  - { id: 29, class: gr32 }
  - { id: 30, class: gr8 }
  - { id: 31, class: gr8 }
  - { id: 32, class: gr64 }
  - { id: 33, class: gr8 }
  - { id: 34, class: gr64 }
  - { id: 35, class: gr64 }
  - { id: 36, class: gr8 }
  - { id: 37, class: gr64 }
  - { id: 38, class: gr8 }
  - { id: 39, class: gr32 }
  - { id: 40, class: gr32 }
  - { id: 41, class: gr8 }
  - { id: 42, class: gr8 }
  - { id: 43, class: gr8 }
liveins:
  - { reg: '$edi', virtual-reg: '%7' }
frameInfo:
  maxAlignment:    1
  hasCalls:        true
machineFunctionInfo: {}
jumpTable:
  kind:            block-address
  entries:
    - id:              0
      blocks:          [ '%bb.11', '%bb.7', '%bb.11', '%bb.7', '%bb.12', 
                         '%bb.7', '%bb.7', '%bb.7', '%bb.7', '%bb.7', '%bb.7', 
                         '%bb.7', '%bb.7', '%bb.7', '%bb.7', '%bb.13', 
                         '%bb.7', '%bb.7', '%bb.7', '%bb.7', '%bb.7', '%bb.7', 
                         '%bb.7', '%bb.7', '%bb.7', '%bb.7', '%bb.7', '%bb.7', 
                         '%bb.7', '%bb.7', '%bb.7', '%bb.7', '%bb.7', '%bb.7', 
                         '%bb.7', '%bb.7', '%bb.7', '%bb.7', '%bb.7', '%bb.7', 
                         '%bb.8' ]
body:             |
  bb.0:
    successors: %bb.2(0x20000000), %bb.14(0x60000000)
    liveins: $edi
  
    %7:gr32 = COPY $edi
    CMP32ri8 %7, 4, implicit-def $eflags
    %0:gr8 = SETCCr 4, implicit $eflags, debug-instr-number 1
    CMP32ri8 %7, 2, implicit-def $eflags
    %1:gr8 = SETCCr 4, implicit $eflags
    CMP32ri8 %7, 1, implicit-def $eflags
    %2:gr8 = SETCCr 4, implicit $eflags
    %11:gr64 = IMPLICIT_DEF
    %12:gr64 = IMPLICIT_DEF
    %5:gr8 = MOV8rm %12, 1, $noreg, 0, $noreg, debug-location !13 :: (load (s8) from `i8* undef`, align 8)
    %13:gr32 = MOV32r0 implicit-def dead $eflags
    %14:gr8 = COPY %13.sub_8bit
    TEST8rr %14, %14, implicit-def $eflags, debug-location !13
    JCC_1 %bb.2, 5, implicit $eflags, debug-location !13
    JMP_1 %bb.14, debug-location !13
  
  bb.14:
    successors: %bb.2(0x2aaaaaab), %bb.1(0x55555555)
  
    CMP8ri %5, 70, implicit-def $eflags, debug-location !13
    JCC_1 %bb.2, 5, implicit $eflags, debug-location !13
    JMP_1 %bb.1, debug-location !13
  
  bb.1:
  
  bb.2:
    successors: %bb.4(0x20000000), %bb.15(0x60000000)
  
    %4:gr64 = MOV64rm %11, 1, $noreg, 0, $noreg, debug-location !13 :: (load (s64) from `%"class.llvm::Instruction"** undef`)
    ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !13
    %16:gr32 = IMPLICIT_DEF
    $edi = COPY %16, debug-location !13
    %17:gr64 = IMPLICIT_DEF
    CALL64r killed %17, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $al, debug-location !13
    ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !13
    %18:gr8 = COPY $al, debug-location !13
    TEST8ri %18, 1, implicit-def $eflags, debug-location !13
    JCC_1 %bb.4, 5, implicit $eflags, debug-location !13
    JMP_1 %bb.15, debug-location !13
  
  bb.15:
    successors: %bb.4(0x2aaaaaab), %bb.3(0x55555555)
  
    CMP8ri %5, 70, implicit-def $eflags, debug-location !13
    JCC_1 %bb.4, 4, implicit $eflags, debug-location !13
    JMP_1 %bb.3, debug-location !13
  
  bb.3:
  
  bb.4:
    successors: %bb.5, %bb.6
  
    %21:gr64 = IMPLICIT_DEF
    %20:gr32 = MOVZX32rm8 killed %21, 1, $noreg, 0, $noreg, debug-location !13 :: (load (s8) from `i32* undef`, align 8)
    %6:gr32 = nsw DEC32r %20, implicit-def dead $eflags, debug-location !13
    CMP32ri8 %6, 5, implicit-def $eflags, debug-location !13
    JCC_1 %bb.6, 7, implicit $eflags, debug-location !13
    JMP_1 %bb.5, debug-location !13
  
  bb.5:
    %24:gr64 = IMPLICIT_DEF
    %23:gr32 = MOVZX32rm8 %24, 1, $noreg, 0, $noreg, debug-location !13 :: (load (s8) from `i8* undef`, align 8)
    %25:gr32 = nsw ADD32ri8 %23, -22, implicit-def dead $eflags, debug-location !13
    ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !13
    $edi = COPY %25, debug-location !13
    %26:gr64 = IMPLICIT_DEF
    CALL64r %26, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $al, debug-location !13
    ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !13
  
  bb.6:
    successors: %bb.7(0x0aaaaaab), %bb.16(0x75555555)
  
    %31:gr8 = IMPLICIT_DEF
    CMP8ri %31, 40, implicit-def $eflags, debug-location !13
    JCC_1 %bb.7, 7, implicit $eflags, debug-location !13
  
  bb.16:
    successors: %bb.11(0x2e8ba2ea), %bb.7(0x0ba2e8ba), %bb.12(0x1745d174), %bb.13(0x1745d174), %bb.8(0x1745d174)
  
    %29:gr32 = MOV32r0 implicit-def dead $eflags
    %28:gr64_nosp = SUBREG_TO_REG 0, %29, %subreg.sub_32bit
    JMP64m $noreg, 8, %28, %jump-table.0, $noreg :: (load (s64) from jump-table)
  
  bb.7:
    %43:gr8 = IMPLICIT_DEF
    $al = COPY %43
    RET 0, $al
  
  bb.8:
    successors: %bb.10(0x20000000), %bb.17(0x60000000)
  
    CMP32ri8 %6, 5, implicit-def $eflags, debug-location !13
    JCC_1 %bb.10, 7, implicit $eflags, debug-location !13
    JMP_1 %bb.17, debug-location !13
  
  bb.17:
    successors: %bb.10(0x2aaaaaab), %bb.9(0x55555555)
  
    %3:gr32 = ADD32ri8 %7, -7, implicit-def dead $eflags
    CMP32ri8 %3, 3, implicit-def $eflags, debug-location !13
    JCC_1 %bb.10, 2, implicit $eflags, debug-location !13
    JMP_1 %bb.9, debug-location !13
  
  bb.9:
    %41:gr8 = IMPLICIT_DEF
    $al = COPY %41
    RET 0, $al
  
  bb.10:
    %42:gr8 = IMPLICIT_DEF
    $al = COPY %42
    RET 0, $al
  
  bb.11:
    %37:gr64 = IMPLICIT_DEF
    MOV8mr killed %37, 1, $noreg, 0, $noreg, %2, debug-location !13 :: (store (s8) into `i8* undef`, align 8)
    %38:gr8 = IMPLICIT_DEF
    $al = COPY %38
    RET 0, $al
  
  bb.12:
    %34:gr64 = IMPLICIT_DEF
    MOV8mr %34, 1, $noreg, 0, $noreg, %1, debug-location !13 :: (store (s8) into `i8* undef`, align 8)
    %35:gr64 = IMPLICIT_DEF
    MOV64mr %35, 1, $noreg, 0, $noreg, %4, debug-location !13 :: (store (s64) into `%"class.llvm::Instruction"** undef`)
    %36:gr8 = IMPLICIT_DEF
    $al = COPY %36
    RET 0, $al
  
  bb.13:
    DBG_INSTR_REF 1, 0, !12, !DIExpression(), debug-location !13
    %32:gr64 = IMPLICIT_DEF
    MOV8mr killed %32, 1, $noreg, 0, $noreg, %0, debug-location !13 :: (store (s8) into `i8* undef`, align 8)
    %33:gr8 = IMPLICIT_DEF
    $al = COPY %33
    RET 0, $al

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