| ; RUN: llc %s -o - -stop-after=finalize-isel -verify-machineinstrs -experimental-debug-variable-locations | FileCheck %s |
| |
| ; In the sequence below, the sdiv is converted to a function call to __divsi3, |
| ; which is then tail call optimised. The dbg.value is suddenly stuck between |
| ; terminators, and the corresponding DBG_INSTR_REF is forced-placed to be |
| ; immediately before the TCRETURN. |
| ; However, with the function having the sspstrong attribute, we then try to |
| ; peel apart the terminator sequence, DBG_INSTR_REF is interpreted as being |
| ; a "real" instruction, and the stack check is inserted at that point rather |
| ; than before the copies-to-physreg setting up the call. This breaks the |
| ; code, and MachineVerifier complains. |
| ; |
| ; Check that the tail sequence is stack-protected, and split at the correct |
| ; position, ignoring the DBG_INSTR_REF |
| |
| target datalayout = "e-m:o-p:32:32-Fi8-f64:32:64-v64:32:64-v128:32:128-a:0:32-n32-S32" |
| target triple = "thumbv7-apple-ios7.0.0" |
| |
| ; CHECK-LABEL: bb.0.entry: |
| ; CHECK: LOAD_STACK_GUARD |
| |
| ; CHECK-LABEL: bb.2.entry: |
| ; CHECK: tBL {{.*}} &__stack_chk_fail, |
| |
| ; CHECK-LABEL: bb.1.entry: |
| ; CHECK: $r0 = COPY %0 |
| ; CHECK-NEXT: $r1 = COPY %1 |
| ; CHECK-NEXT: DBG_INSTR_REF 1, 0 |
| ; CHECK-NEXT: TCRETURNdi &__divsi3, 0, implicit $sp, implicit $r0, implicit $r1 |
| |
| declare i1 @ext() |
| |
| define i32 @test(i32 %a1, i32 %a2) #1 !dbg !5 { |
| entry: |
| %foo = alloca i32, i32 %a1 |
| %bool = call i1 @ext() |
| %res = sdiv i32 %a1, %a2 |
| call void @llvm.dbg.value(metadata i32 %a1, metadata !13, metadata !DIExpression()), !dbg !16 |
| ret i32 %res |
| } |
| |
| attributes #1 = {sspstrong} |
| |
| ; Function Attrs: nounwind readnone speculatable willreturn |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_Swift, file: !1, producer: "Swift", isOptimized: true, runtimeVersion: 5, emissionKind: FullDebug) |
| !1 = !DIFile(filename: "foo.swift", directory: "/tmp") |
| !2 = !{} |
| !3 = !{i32 2, !"Debug Info Version", i32 3} |
| !4 = !{i32 1, !"Swift Minor Version", i8 3} |
| !5 = distinct !DISubprogram(name: "n0", linkageName: "n1", scope: !7, file: !6, line: 86, type: !8, scopeLine: 86, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0) |
| !6 = !DIFile(filename: "bar.swift", directory: "") |
| !7 = !DIModule(scope: null, name: "Swift") |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{!10, !12} |
| !10 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "Int", scope: !7, file: !11, size: 32, elements: !2, runtimeLang: DW_LANG_Swift, identifier: "$i1") |
| !11 = !DIFile(filename: "f1.swift", directory: "") |
| !12 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "n2", scope: !7, file: !6, size: 32, elements: !2, runtimeLang: DW_LANG_Swift, identifier: "n3") |
| !13 = !DILocalVariable(name: "n4", scope: !14, file: !1, line: 89, type: !15) |
| !14 = distinct !DILexicalBlock(scope: !5, file: !6, line: 86, column: 34) |
| !15 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !10) |
| !16 = !DILocation(line: 89, column: 9, scope: !14) |