mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 03:02:36 +01:00
c362f0a17e
The D35953, D62650 and D73691 introduced trimming of variables locations in LiveDebugVariables pass, since there are some cases where after the virtregrewrite we have exploded number of DBG_VALUEs created for some inlined variables. As it looks, all problematic cases were regarding inlined variables, so it seems reasonable to stop trimming the location ranges for non-inlined variables. It has very good impact on the llvm-locstats report. Differential Revision: https://reviews.llvm.org/D102917
99 lines
3.7 KiB
LLVM
99 lines
3.7 KiB
LLVM
; RUN: llc %s -o %t.s
|
|
; RUN: llvm-mc %t.s -filetype=obj -triple=x86_64-windows-msvc -o %t.o
|
|
; RUN: FileCheck %s < %t.s --check-prefix=ASM
|
|
; RUN: llvm-dwarfdump %t.o | FileCheck %s --check-prefix=DWARF
|
|
|
|
; In this example, the variable lives mostly in memory, but at the point of the
|
|
; assignment to global, it lives nowhere, and is described as the constant
|
|
; value 1.
|
|
|
|
; C source:
|
|
;
|
|
; void escape(int *);
|
|
; extern int global;
|
|
; void f(int x) {
|
|
; escape(&x);
|
|
; x = 1; // DSE should delete and insert dbg.value(i32 1)
|
|
; global = x;
|
|
; x = 2; // DSE should insert dbg.addr
|
|
; escape(&x);
|
|
; }
|
|
|
|
; ModuleID = 'dse.c'
|
|
source_filename = "dse.c"
|
|
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-pc-windows-msvc19.0.24215"
|
|
|
|
declare void @llvm.dbg.addr(metadata, metadata, metadata) #2
|
|
declare void @llvm.dbg.value(metadata, metadata, metadata) #2
|
|
declare void @escape(i32*)
|
|
|
|
@global = external global i32, align 4
|
|
|
|
; Function Attrs: nounwind uwtable
|
|
define void @f(i32 %x) #0 !dbg !8 {
|
|
entry:
|
|
%x.addr = alloca i32, align 4
|
|
store i32 %x, i32* %x.addr, align 4
|
|
call void @llvm.dbg.addr(metadata i32* %x.addr, metadata !13, metadata !DIExpression()), !dbg !18
|
|
call void @escape(i32* %x.addr), !dbg !19
|
|
call void @llvm.dbg.value(metadata i32 1, metadata !13, metadata !DIExpression()), !dbg !20
|
|
store i32 1, i32* @global, align 4, !dbg !22
|
|
call void @llvm.dbg.addr(metadata i32* %x.addr, metadata !13, metadata !DIExpression()), !dbg !23
|
|
store i32 2, i32* %x.addr, align 4, !dbg !23
|
|
call void @escape(i32* %x.addr), !dbg !24
|
|
ret void, !dbg !25
|
|
}
|
|
|
|
; ASM-LABEL: f: # @f
|
|
; ASM: #DEBUG_VALUE: f:x <- [DW_OP_plus_uconst [[OFF_X:[0-9]+]]] [$rsp+0]
|
|
; ASM: movl %ecx, [[OFF_X]](%rsp)
|
|
; ASM: callq escape
|
|
; ASM: #DEBUG_VALUE: f:x <- 1
|
|
; ASM: movl $1, global(%rip)
|
|
; ASM: #DEBUG_VALUE: f:x <- [DW_OP_plus_uconst [[OFF_X]]] [$rsp+0]
|
|
; ASM: movl $2, [[OFF_X]](%rsp)
|
|
; ASM: callq escape
|
|
; ASM: retq
|
|
|
|
; DWARF: DW_TAG_formal_parameter
|
|
; DWARF-NEXT: DW_AT_location (0x00000000
|
|
; DWARF-NEXT: {{[^:]*}}: DW_OP_breg7 RSP+{{[0-9]+}}
|
|
; DWARF-NEXT: {{[^:]*}}: DW_OP_consts +1, DW_OP_stack_value
|
|
; DWARF-NEXT: {{[^:]*}}: DW_OP_breg7 RSP+{{[0-9]+}})
|
|
; DWARF-NEXT: DW_AT_name ("x")
|
|
|
|
attributes #0 = { nounwind uwtable }
|
|
attributes #2 = { nounwind readnone speculatable }
|
|
|
|
!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 version 6.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
|
|
!1 = !DIFile(filename: "dse.c", directory: "C:\5Csrc\5Cllvm-project\5Cbuild")
|
|
!2 = !{}
|
|
!3 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!4 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!5 = !{i32 1, !"wchar_size", i32 2}
|
|
!6 = !{i32 7, !"PIC Level", i32 2}
|
|
!7 = !{!"clang version 6.0.0 "}
|
|
!8 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 3, type: !9, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !12)
|
|
!9 = !DISubroutineType(types: !10)
|
|
!10 = !{null, !11}
|
|
!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
|
|
!12 = !{!13}
|
|
!13 = !DILocalVariable(name: "x", arg: 1, scope: !8, file: !1, line: 3, type: !11)
|
|
!14 = !{!15, !15, i64 0}
|
|
!15 = !{!"int", !16, i64 0}
|
|
!16 = !{!"omnipotent char", !17, i64 0}
|
|
!17 = !{!"Simple C/C++ TBAA"}
|
|
!18 = !DILocation(line: 3, column: 12, scope: !8)
|
|
!19 = !DILocation(line: 4, column: 3, scope: !8)
|
|
!20 = !DILocation(line: 5, column: 5, scope: !8)
|
|
!21 = !DILocation(line: 6, column: 12, scope: !8)
|
|
!22 = !DILocation(line: 6, column: 10, scope: !8)
|
|
!23 = !DILocation(line: 7, column: 5, scope: !8)
|
|
!24 = !DILocation(line: 8, column: 3, scope: !8)
|
|
!25 = !DILocation(line: 9, column: 1, scope: !8)
|