You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
3.1 KiB
68 lines
3.1 KiB
; RUN: llc -start-before=codegenprepare -stop-after=codegenprepare -mtriple=x86_64-unknown-unknown %s -o - | FileCheck %s
|
|
;
|
|
; CGP duplicates address calculation into each basic block that contains loads
|
|
; or stores, so that they can be folded into instruction memory operands for
|
|
; example. dbg.value's should be redirected to identify such local address
|
|
; computations, to give the best opportunity for variable locations to be
|
|
; preserved.
|
|
; This test has two dbg.values in it, one before and one after the relevant
|
|
; memory instruction. Test that the one before does _not_ get updated (as that
|
|
; would either make it use-before-def or shift when the variable appears), and
|
|
; that the dbg.value after the memory instruction does get updated.
|
|
|
|
define dso_local i8 @foo(i32 *%p, i32 %cond) !dbg !7 {
|
|
entry:
|
|
; There should be no dbg.values in this block.
|
|
; CHECK-LABEL: entry:
|
|
; CHECK-NOT: dbg.value
|
|
%casted = bitcast i32 *%p to i8*
|
|
%arith = getelementptr i8, i8 *%casted, i32 3
|
|
%load1 = load i8, i8 *%arith
|
|
%cmpresult = icmp eq i32 %cond, 0
|
|
br i1 %cmpresult, label %next, label %ret
|
|
|
|
next:
|
|
; Address calcs should be duplicated into this block. One dbg.value should be
|
|
; updated, and the other should not.
|
|
; CHECK-LABEL: next:
|
|
; CHECK: dbg.value(metadata i8* %arith, metadata ![[DIVAR:[0-9]+]],
|
|
; CHECK-SAME: metadata !DIExpression()
|
|
; CHECK-NEXT: %[[CASTVAR:[0-9a-zA-Z]+]] = bitcast i32* %p to i8*
|
|
; CHECK-NEXT: %[[GEPVAR:[0-9a-zA-Z]+]] = getelementptr i8, i8* %[[CASTVAR]],
|
|
; CHECK-SAME: i64 3
|
|
; CHECK-NEXT: %loaded = load i8, i8* %[[GEPVAR]]
|
|
; CHECK-NEXT: call void @llvm.dbg.value(metadata i8* %[[GEPVAR]],
|
|
; CHECK-SAME: metadata ![[DIVAR]],
|
|
call void @llvm.dbg.value(metadata i8 *%arith, metadata !12, metadata !DIExpression()), !dbg !14
|
|
%loaded = load i8, i8 *%arith
|
|
call void @llvm.dbg.value(metadata i8 *%arith, metadata !12, metadata !DIExpression()), !dbg !14
|
|
ret i8 %loaded
|
|
|
|
ret:
|
|
ret i8 0
|
|
}
|
|
|
|
; CHECK: ![[DIVAR]] = !DILocalVariable(name: "p",
|
|
|
|
declare void @llvm.dbg.value(metadata, metadata, metadata)
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!3, !4, !5}
|
|
!llvm.ident = !{!6}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
|
|
!1 = !DIFile(filename: "test.cpp", directory: ".")
|
|
!2 = !{}
|
|
!3 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!4 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!5 = !{i32 1, !"wchar_size", i32 4}
|
|
!6 = !{!"clang version 8.0.0 (trunk 348209)"}
|
|
!7 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: !1, file: !1, line: 4, type: !8, scopeLine: 5, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
|
|
!8 = !DISubroutineType(types: !9)
|
|
!9 = !{null, !10}
|
|
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
|
|
!11 = !{!12}
|
|
!12 = !DILocalVariable(name: "p", arg: 1, scope: !7, file: !1, line: 4, type: !10)
|
|
!14 = !DILocation(line: 4, column: 15, scope: !7)
|
|
!20 = distinct !DILexicalBlock(scope: !7, file: !1, line: 8, column: 7)
|