| ; RUN: opt < %s -O2 -gvn -S | FileCheck %s |
| ; |
| ; Produced at -O2 from: |
| ; struct context { |
| ; int cur_pid |
| ; }; |
| ; int a, b, c, f, d; |
| ; int pid_for_task(int); |
| ; sample(struct context *p1) |
| ; { |
| ; if (c) |
| ; b = a; |
| ; if (a && p1->cur_pid) |
| ; sample_internal(); |
| ; } |
| ; callback() { |
| ; f = pid_for_task(d); |
| ; sample(&f); |
| ; } |
| |
| target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128" |
| target triple = "arm64-apple-ios" |
| |
| %struct.context = type { i32 } |
| |
| @c = common global i32 0, align 4 |
| @a = common global i32 0, align 4 |
| @b = common global i32 0, align 4 |
| @d = common global i32 0, align 4 |
| @f = common global i32 0, align 4 |
| |
| ; Function Attrs: nounwind |
| declare i32 @sample_internal(...) |
| |
| ; Function Attrs: nounwind |
| define i32 @callback() #0 { |
| entry: |
| %0 = load i32, i32* @d, align 4, !dbg !37 |
| |
| ; Verify that the call still has a debug location after GVN. |
| ; CHECK: %call = tail call i32 @pid_for_task(i32 %0) #{{[0-9]}}, !dbg |
| %call = tail call i32 @pid_for_task(i32 %0) #3, !dbg !37 |
| |
| store i32 %call, i32* @f, align 4, !dbg !37 |
| tail call void @llvm.dbg.value(metadata %struct.context* bitcast (i32* @f to %struct.context*), i64 0, metadata !25, metadata !26) #3, !dbg !38 |
| %1 = load i32, i32* @c, align 4, !dbg !40 |
| %tobool.i = icmp eq i32 %1, 0, !dbg !40 |
| %.pr.i = load i32, i32* @a, align 4, !dbg !41 |
| br i1 %tobool.i, label %if.end.i, label %if.then.i, !dbg !42 |
| |
| if.then.i: ; preds = %entry |
| store i32 %.pr.i, i32* @b, align 4, !dbg !43 |
| br label %if.end.i, !dbg !43 |
| |
| if.end.i: ; preds = %if.then.i, %entry |
| %tobool1.i = icmp eq i32 %.pr.i, 0, !dbg !41 |
| |
| ; This instruction has no debug location -- in this |
| ; particular case it was removed by a bug in SimplifyCFG. |
| %2 = load i32, i32* @f, align 4 |
| |
| ; GVN is supposed to replace the load of @f with a direct reference to %call. |
| ; CHECK: %tobool2.i = icmp eq i32 %call, 0, !dbg |
| %tobool2.i = icmp eq i32 %2, 0, !dbg !41 |
| |
| %or.cond = or i1 %tobool1.i, %tobool2.i, !dbg !41 |
| br i1 %or.cond, label %sample.exit, label %if.then.3.i, !dbg !41 |
| |
| if.then.3.i: ; preds = %if.end.i |
| %call.i = tail call i32 bitcast (i32 (...)* @sample_internal to i32 ()*)() #3, !dbg !44 |
| br label %sample.exit, !dbg !44 |
| |
| sample.exit: ; preds = %if.end.i, %if.then.3.i |
| ret i32 undef, !dbg !45 |
| } |
| |
| declare i32 @pid_for_task(i32) #1 |
| |
| ; Function Attrs: nounwind readnone |
| declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2 |
| |
| attributes #0 = { nounwind } |
| attributes #2 = { nounwind readnone } |
| attributes #3 = { nounwind } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!22, !23} |
| !llvm.ident = !{!24} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (trunk 244473) (llvm/trunk 244644)", isOptimized: false, runtimeVersion: 0, emissionKind: 1, enums: !2, subprograms: !3, globals: !16) |
| !1 = !DIFile(filename: "test.c", directory: "/") |
| !2 = !{} |
| !3 = !{!4, !13} |
| !4 = !DISubprogram(name: "sample", scope: !5, file: !5, line: 6, type: !6, isLocal: false, isDefinition: true, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: false, variables: !2) |
| !5 = !DIFile(filename: "test.i", directory: "/") |
| !6 = !DISubroutineType(types: !7) |
| !7 = !{!8, !9} |
| !8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) |
| !9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64, align: 64) |
| !10 = !DICompositeType(tag: DW_TAG_structure_type, name: "context", file: !5, line: 1, size: 32, align: 32, elements: !11) |
| !11 = !{!12} |
| !12 = !DIDerivedType(tag: DW_TAG_member, name: "cur_pid", scope: !10, file: !5, line: 2, baseType: !8, size: 32, align: 32) |
| !13 = !DISubprogram(name: "callback", scope: !5, file: !5, line: 13, type: !14, isLocal: false, isDefinition: true, scopeLine: 13, isOptimized: false, function: i32 ()* @callback, variables: !2) |
| !14 = !DISubroutineType(types: !15) |
| !15 = !{!8} |
| !16 = !{!17, !18, !19, !20, !21} |
| !17 = !DIGlobalVariable(name: "a", scope: !0, file: !5, line: 4, type: !8, isLocal: false, isDefinition: true, variable: i32* @a) |
| !18 = !DIGlobalVariable(name: "b", scope: !0, file: !5, line: 4, type: !8, isLocal: false, isDefinition: true, variable: i32* @b) |
| !19 = !DIGlobalVariable(name: "c", scope: !0, file: !5, line: 4, type: !8, isLocal: false, isDefinition: true, variable: i32* @c) |
| !20 = !DIGlobalVariable(name: "f", scope: !0, file: !5, line: 4, type: !8, isLocal: false, isDefinition: true, variable: i32* @f) |
| !21 = !DIGlobalVariable(name: "d", scope: !0, file: !5, line: 4, type: !8, isLocal: false, isDefinition: true, variable: i32* @d) |
| !22 = !{i32 2, !"Dwarf Version", i32 2} |
| !23 = !{i32 2, !"Debug Info Version", i32 3} |
| !24 = !{!"clang version 3.8.0 (trunk 244473) (llvm/trunk 244644)"} |
| !25 = !DILocalVariable(tag: DW_TAG_auto_variable, name: "p1", arg: 1, scope: !4, file: !5, line: 6, type: !9) |
| !26 = !DIExpression() |
| !27 = !DILocation(line: 6, scope: !4) |
| !28 = !DILocation(line: 8, scope: !29) |
| !29 = distinct !DILexicalBlock(scope: !4, file: !5, line: 8) |
| !30 = !DILocation(line: 10, scope: !31) |
| !31 = distinct !DILexicalBlock(scope: !4, file: !5, line: 10) |
| !32 = !DILocation(line: 8, scope: !4) |
| !33 = !DILocation(line: 9, scope: !29) |
| !34 = !DILocation(line: 10, scope: !4) |
| !35 = !DILocation(line: 11, scope: !31) |
| !36 = !DILocation(line: 12, scope: !4) |
| !37 = !DILocation(line: 14, scope: !13) |
| !38 = !DILocation(line: 6, scope: !4, inlinedAt: !39) |
| !39 = distinct !DILocation(line: 15, scope: !13) |
| !40 = !DILocation(line: 8, scope: !29, inlinedAt: !39) |
| !41 = !DILocation(line: 10, scope: !31, inlinedAt: !39) |
| !42 = !DILocation(line: 8, scope: !4, inlinedAt: !39) |
| !43 = !DILocation(line: 9, scope: !29, inlinedAt: !39) |
| !44 = !DILocation(line: 11, scope: !31, inlinedAt: !39) |
| !45 = !DILocation(line: 16, scope: !13) |