# RUN: llc -start-after=phi-node-elimination -stop-after=virtregrewriter %s -mtriple=x86_64-unknown-unknown -o - | FileCheck %s
#
# Test that when a livedebugvars interval is split, DBG_VALUE_LISTs are created
# with the correct operands and exprs. Force values to be moved around between
# registers and stack through inline asm blocks that clobber things.
#
# CHECK-LABEL: bb.0.entry:
# CHECK: $rbx = COPY $rsi
# CHECK-NEXT: MOV64mr %stack.0, 1, $noreg, 0, $noreg, $rdi
# CHECK-NEXT: DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_deref, DW_OP_LLVM_arg, 1, DW_OP_plus), %stack.0, $rbx,
# CHECK-NEXT: INLINEASM
# CHECK-NEXT: $rax = MOV64rm %stack.0,
# CHECK-NEXT: DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rax, $rbx,
# CHECK-NEXT: CALL64pcrel32 @foo
# CHECK-NEXT: DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_deref, DW_OP_LLVM_arg, 1, DW_OP_plus), %stack.0, $rbx,
# CHECK-NEXT: $rcx = COPY killed renamable $rbx
# CHECK-NEXT: DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_deref, DW_OP_LLVM_arg, 1, DW_OP_plus), %stack.0, $rcx,
# CHECK-NEXT: INLINEASM
# CHECK-NEXT: $rax = MOV64rm %stack.0
# CHECK-NEXT: DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rax, $rcx,
--- |
; ModuleID = 'tmp.ll'
source_filename = "tmp.ll"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
%struct.a = type { i32 }
; Function Attrs: nounwind ssp
define i32 @bar(ptr nocapture %b, i32 %shoes) !dbg !4 {
entry:
tail call void @llvm.dbg.value(metadata i32 %shoes, metadata !9, metadata !DIExpression()), !dbg !16
%tmp1 = getelementptr inbounds %struct.a, ptr %b, i64 0, i32 0, !dbg !17
br label %bb3
bb1: ; preds = %bb2
tail call void @llvm.dbg.value(metadata i32 %shoes, metadata !9, metadata !DIExpression()), !dbg !16
%add = add nsw i32 %tmp2, 1, !dbg !18
br label %exit
bb2: ; preds = %bb3
tail call void @llvm.dbg.value(metadata i32 %tmp2, metadata !14, metadata !DIExpression()), !dbg !17
%call = tail call i32 (...) @foo(i32 %tmp2), !dbg !19
br label %bb1
bb3: ; preds = %entry
%tmp2 = load i32, ptr %tmp1, align 4, !dbg !17
br label %bb2
exit: ; preds = %bb1
ret i32 %shoes, !dbg !18
}
declare i32 @foo(...)
; Function Attrs: nounwind readnone speculatable willreturn
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 2.9 (trunk 122997)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2)
!1 = !DIFile(filename: "bar.c", directory: "/private/tmp")
!2 = !{}
!3 = !{i32 1, !"Debug Info Version", i32 3}
!4 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 5, type: !5, virtualIndex: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)
!5 = !DISubroutineType(types: !6)
!6 = !{!7}
!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!8 = !{!9, !14}
!9 = !DILocalVariable(name: "b", arg: 1, scope: !4, file: !1, line: 5, type: !10)
!10 = !DIDerivedType(tag: DW_TAG_pointer_type, scope: !0, baseType: !11, size: 64, align: 64)
!11 = !DICompositeType(tag: DW_TAG_structure_type, name: "a", scope: !0, file: !1, line: 1, size: 32, align: 32, elements: !12)
!12 = !{!13}
!13 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !1, file: !1, line: 2, baseType: !7, size: 32, align: 32)
!14 = !DILocalVariable(name: "x", scope: !15, file: !1, line: 6, type: !7)
!15 = distinct !DILexicalBlock(scope: !4, file: !1, line: 5, column: 22)
!16 = !DILocation(line: 5, column: 19, scope: !4)
!17 = !DILocation(line: 6, column: 14, scope: !15)
!18 = !DILocation(line: 8, column: 2, scope: !15)
!19 = !DILocation(line: 7, column: 2, scope: !15)
...
---
name: bar
tracksRegLiveness: true
body: |
bb.0.entry:
liveins: $rdi, $rsi
%4:gr64= COPY $rsi
%2:gr64 = COPY $rdi
DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), %2, %4, debug-location !17
%3:gr64 = COPY killed %2
%5:gr64 = COPY killed %4
; Force allocation into $rax and $rbx
INLINEASM &"", 1, 12, implicit-def dead $rcx, 12, implicit-def dead $rdx, 12, implicit-def dead $rsi, 12, implicit-def dead $rdi, 12, implicit-def $rbp, 12, implicit-def dead $r8, 12, implicit-def dead $r9, 12, implicit-def dead $r10, 12, implicit-def dead $r11, 12, implicit-def dead $r12, 12, implicit-def dead $r13, 12, implicit-def dead $r14, 12, implicit-def dead $r15, 12, !18, debug-location !17
; Force a use of these two registers.
CALL64pcrel32 @foo, csr_64, implicit $rsp, implicit $ssp, implicit %3, implicit %5
; Now make the register allocator move them to rcx and rdx!
INLINEASM &"", 1, 12, implicit-def dead $rax, 12, implicit-def dead $rbx, 12, implicit-def dead $rsi, 12, implicit-def dead $rdi, 12, implicit-def $rbp, 12, implicit-def dead $r8, 12, implicit-def dead $r9, 12, implicit-def dead $r10, 12, implicit-def dead $r11, 12, implicit-def dead $r12, 12, implicit-def dead $r13, 12, implicit-def dead $r14, 12, implicit-def dead $r15, 12, !18, debug-location !17
CALL64pcrel32 @foo, csr_64, implicit $rsp, implicit $ssp, implicit %3, implicit %5
RET64
...
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