# RUN: llc %s -o - -experimental-debug-variable-locations \
# RUN: -start-before=x86-flags-copy-lowering -stop-after=virtregrewriter \
# RUN: -mtriple x86_64-unknown-unknown -enable-split-loopiv-heuristic=false \
# RUN: | FileCheck %s
#
# This test is for stack spill folding -- the INC32r near the end of the MIR
# below show be morphed into an INC32m by the register allocator, making it
# load-operate-store to %stack.0. We should track this fact in the substitution
# table, by adding a substitution to the memory-operand operand number.
#
# The INC32r is a tied-def instruction.
#
# NB: This test would more ideally start at phi-node-elimination, where
# register allocation begins, however for some reason the INC32r gets
# transformed into a different instruction if we do that. Start at the last
# optimisation pass before regalloc instead.
#
# CHECK: debugValueSubstitutions:
# CHECK-NEXT: - { srcinst: 1, srcop: 0, dstinst: 2, dstop: 1000000, subreg: 0 }
# CHECK-LABEL: bb.5:
# CHECK: INC32m %stack.0, {{.*}} debug-instr-number 2,
--- |
; ModuleID = 'reduced.ll'
source_filename = "reduced.ll"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
%"class.llvm::APInt" = type { i32, %union.anon }
%union.anon = type { i64 }
define void @_ZNK4llvm5APInt5magicEv() local_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: _ZNK4llvm5APInt5magicEv
alignment: 16
tracksRegLiveness: true
debugInstrRef: true
registers:
- { id: 0, class: gr64 }
- { id: 1, class: gr32 }
- { id: 2, class: gr64 }
- { id: 3, class: gr32 }
- { id: 4, class: gr64 }
- { id: 5, class: gr32 }
- { id: 6, class: gr32 }
- { id: 7, class: gr32 }
- { id: 8, class: gr64 }
- { id: 9, class: gr32 }
- { id: 10, class: gr64 }
- { id: 11, class: gr32 }
- { id: 12, class: gr64 }
- { id: 13, class: gr32 }
- { id: 14, class: gr64 }
- { id: 15, class: gr32 }
- { id: 16, class: gr64 }
- { id: 17, class: gr64 }
- { id: 18, class: gr64 }
- { id: 19, class: gr32 }
- { id: 20, class: gr8 }
- { id: 21, class: gr32 }
- { id: 22, class: gr64 }
- { id: 23, class: gr64 }
- { id: 24, class: gr64 }
- { id: 25, class: gr64 }
- { id: 26, class: gr64 }
- { id: 27, class: gr32 }
- { id: 28, class: gr8 }
- { id: 29, class: gr64 }
- { id: 30, class: gr64 }
- { id: 31, class: gr64 }
- { id: 32, class: gr64 }
- { id: 33, class: gr64 }
- { id: 34, class: gr64 }
- { id: 35, class: gr64 }
- { id: 36, class: gr64 }
- { id: 37, class: gr64 }
- { id: 38, class: gr8 }
frameInfo:
maxAlignment: 1
adjustsStack: true
hasCalls: true
machineFunctionInfo: {}
body: |
bb.0:
%15:gr32 = IMPLICIT_DEF
%14:gr64 = IMPLICIT_DEF
%17:gr64 = IMPLICIT_DEF
%18:gr64 = IMPLICIT_DEF
%19:gr32 = MOV32r0 implicit-def dead $eflags
%22:gr64 = IMPLICIT_DEF
%23:gr64 = IMPLICIT_DEF
%24:gr64 = IMPLICIT_DEF
%25:gr64 = IMPLICIT_DEF
%26:gr64 = IMPLICIT_DEF
%30:gr64 = IMPLICIT_DEF
%31:gr64 = IMPLICIT_DEF
%32:gr64 = IMPLICIT_DEF
%33:gr64 = IMPLICIT_DEF
%34:gr64 = IMPLICIT_DEF
%35:gr64 = IMPLICIT_DEF
%36:gr64 = IMPLICIT_DEF
%37:gr64 = IMPLICIT_DEF
%21:gr32 = IMPLICIT_DEF
bb.1:
%0:gr64 = PHI %14, %bb.0, %12, %bb.5
%1:gr32 = PHI %15, %bb.0, %11, %bb.5
%2:gr64 = PHI %14, %bb.0, %10, %bb.5
%3:gr32 = PHI %15, %bb.0, %9, %bb.5
%4:gr64 = PHI %14, %bb.0, %8, %bb.5
%5:gr32 = PHI %15, %bb.0, %7, %bb.5, debug-location !13
%6:gr32 = PHI %15, %bb.0, %13, %bb.5, debug-location !13
%16:gr64 = ADD64rr %4, %4, implicit-def dead $eflags, debug-location !13
MOV32mr %17, 1, $noreg, 0, $noreg, %5, debug-location !13 :: (store (s32) into `ptr undef`, align 8)
MOV64mr %18, 1, $noreg, 0, $noreg, killed %16, debug-location !13 :: (store (s64) into `ptr undef`)
%20:gr8 = COPY %19.sub_8bit
TEST8rr %20, %20, implicit-def $eflags, debug-location !13
JCC_1 %bb.3, 5, implicit $eflags, debug-location !13
JMP_1 %bb.2, debug-location !13
bb.2:
bb.3:
successors: %bb.4, %bb.5
%7:gr32 = PHI %5, %bb.1, %21, %bb.2, debug-location !13
MOV32mr %22, 1, $noreg, 0, $noreg, %7, debug-location !13 :: (store (s32) into `ptr undef`, align 8)
%8:gr64 = MOV64rm %23, 1, $noreg, 0, $noreg, debug-location !13 :: (load (s64) from `ptr undef`)
MOV32mr %24, 1, $noreg, 0, $noreg, %3, debug-location !13 :: (store (s32) into `ptr undef`, align 8)
MOV64mi32 %25, 1, $noreg, 0, $noreg, 0, debug-location !13 :: (store (s64) into `ptr undef`)
%28:gr8 = COPY %19.sub_8bit
TEST8rr %28, %28, implicit-def $eflags, debug-location !13
JCC_1 %bb.5, 5, implicit $eflags, debug-location !13
JMP_1 %bb.4, debug-location !13
bb.4:
%29:gr64 = ADD64rr %2, %2, implicit-def dead $eflags, debug-location !13
MOV64mr %30, 1, $noreg, 0, $noreg, killed %29, debug-location !13 :: (store (s64) into `ptr undef`)
bb.5:
%9:gr32 = MOV32rm %26, 1, $noreg, 0, $noreg, debug-location !13 :: (load (s32) from `ptr undef`, align 8)
%10:gr64 = MOV64rm %31, 1, $noreg, 0, $noreg, debug-location !13 :: (load (s64) from `ptr undef`)
%12:gr64 = ADD64rr %0, %0, implicit-def dead $eflags, debug-location !13
MOV32mr %32, 1, $noreg, 0, $noreg, %1, debug-location !13 :: (store (s32) into `ptr undef`, align 8)
MOV64mr %33, 1, $noreg, 0, $noreg, %12, debug-location !13 :: (store (s64) into `ptr undef`)
%11:gr32 = MOV32rm %34, 1, $noreg, 0, $noreg, debug-location !13 :: (load (s32) from `ptr undef`, align 8)
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !13
$rdi = COPY %35, debug-location !13
$rsi = COPY %36, debug-location !13
CALL64r %37, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit $rsi, 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
%13:gr32 = INC32r %6, implicit-def dead $eflags, debug-instr-number 1, debug-location !13
DBG_INSTR_REF !12, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !13
JMP_1 %bb.1, debug-location !13
...
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