llvm-mirror/test/CodeGen/AArch64/phi-dbg.ll
Matthias Braun 08fbde827c MachineOperand/MIParser: Do not print debug-use flag, infer it
The debug-use flag must be set exactly for uses on DBG_VALUEs.  This is
so obvious that it can be trivially inferred while parsing. This will
reduce noise when printing while omitting an information that has little
value to the user.

The parser will keep recognizing the flag for compatibility with old
`.mir` files.

Differential Revision: https://reviews.llvm.org/D53903

llvm-svn: 345671
2018-10-30 23:28:27 +00:00

85 lines
3.3 KiB
LLVM

; RUN: llc -O0 %s -mtriple=aarch64 -stop-after=phi-node-elimination -o - | FileCheck %s
; Test that a DEBUG_VALUE node is create for variable c after the phi has been
; converted to a ldr. The DEBUG_VALUE must be *after* the ldr and not before it.
; Created from the C code, compiled with -O0 -g and then passed through opt -mem2reg:
;
; int func(int a)
; {
; int c = 1;
; if (a < 0 ) {
; c = 12;
; }
; return c;
; }
;
; Function Attrs: nounwind
; CHECK: !14 = !DILocalVariable(name: "c"
; CHECK-LABEL: name: func
define i32 @func(i32 %a0) #0 !dbg !8 {
entry:
call void @llvm.dbg.value(metadata i32 %a0, i64 0, metadata !12, metadata !13), !dbg !14
call void @llvm.dbg.value(metadata i32 1, i64 0, metadata !15, metadata !13), !dbg !16
%v2 = icmp slt i32 %a0, 0, !dbg !17
br i1 %v2, label %bb2, label %bb3, !dbg !19
bb2:
call void @llvm.dbg.value(metadata i32 12, i64 0, metadata !15, metadata !13), !dbg !16
br label %bb3, !dbg !20
; CHECK: bb.2.bb2:
; CHECK: [[REG0:%[0-9]+]]:gpr32 = MOVi32imm 12
; CHECK: [[PHIREG:%[0-9]+]]:gpr32 = COPY [[REG0]]
bb3:
; CHECK: bb.3.bb3:
; CHECK: [[PHIDEST:%[0-9]+]]:gpr32 = COPY [[PHIREG]]
; CHECK-NEXT: DBG_VALUE [[PHIDEST]]
%.0 = phi i32 [ 12, %bb2 ], [ 1, %entry ]
call void @llvm.dbg.value(metadata i32 %.0, i64 0, metadata !15, metadata !13), !dbg !16
; CHECK: [[ADD:%[0-9]+]]:gpr32 = nsw ADDWrr [[PHIDEST]]
; CHECK-NEXT: DBG_VALUE [[ADD]]
%v5 = add nsw i32 %.0, %a0, !dbg !22
call void @llvm.dbg.value(metadata i32 %v5, i64 0, metadata !15, metadata !13), !dbg !16
ret i32 %v5, !dbg !23
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
attributes #0 = { nounwind }
attributes #1 = { nounwind readnone }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5, !6}
!llvm.ident = !{!7}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "a.c", directory: "/tmp")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = !{i32 1, !"min_enum_size", i32 4}
!7 = !{!"clang"}
!8 = distinct !DISubprogram(name: "func", scope: !1, file: !1, line: 1, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
!9 = !DISubroutineType(types: !10)
!10 = !{!11, !11}
!11 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!12 = !DILocalVariable(name: "a", arg: 1, scope: !8, file: !1, line: 1, type: !11)
!13 = !DIExpression()
!14 = !DILocation(line: 1, column: 14, scope: !8)
!15 = !DILocalVariable(name: "c", scope: !8, file: !1, line: 3, type: !11)
!16 = !DILocation(line: 3, column: 13, scope: !8)
!17 = !DILocation(line: 4, column: 15, scope: !18)
!18 = distinct !DILexicalBlock(scope: !8, file: !1, line: 4, column: 13)
!19 = !DILocation(line: 4, column: 13, scope: !8)
!20 = !DILocation(line: 6, column: 9, scope: !21)
!21 = distinct !DILexicalBlock(scope: !18, file: !1, line: 4, column: 21)
!22 = !DILocation(line: 7, column: 4, scope: !8)
!23 = !DILocation(line: 8, column: 9, scope: !8)