| ; RUN: llc -mtriple=x86_64-windows-msvc < %s | FileCheck %s --check-prefix=ASM |
| ; RUN: llc -mtriple=x86_64-windows-msvc < %s -filetype=obj | llvm-readobj -codeview - | FileCheck %s --check-prefix=OBJ |
| |
| ; This test attempts to exercise gaps in local variables. The local variable 'p' |
| ; will end up in some CSR (ESI), which will be used in both the BB scheduled |
| ; discontiguously out of line and the normal return BB. The best way to encode |
| ; this is to use a LocalVariableAddrGap. If the gap is too large, multiple |
| ; ranges should be emitted. |
| |
| ; Source to regenerate: |
| ; int barrier(); |
| ; int vardef(); |
| ; void use(int); |
| ; void __declspec(noreturn) call_noreturn(int); |
| ; int f() { |
| ; if (barrier()) { |
| ; int p = vardef(); |
| ; if (barrier()) // Unlikely, will be placed after return |
| ; call_noreturn(p); |
| ; use(p); |
| ; } else { |
| ; barrier(); |
| ; } |
| ; return 0; |
| ; } |
| |
| ; ASM: f: # @f |
| ; ASM: pushq %rsi |
| ; ASM: subq $32, %rsp |
| ; ASM: callq barrier |
| ; ASM: testl %eax, %eax |
| ; ASM: je .LBB0_3 |
| ; ASM: callq vardef |
| ; ASM: movl %eax, %esi |
| ; ASM: [[p_b1:\.Ltmp[0-9]+]]: |
| ; ASM: #DEBUG_VALUE: p <- %ESI |
| ; ASM: callq barrier |
| ; ASM: movl %esi, %ecx |
| ; ASM: testl %eax, %eax |
| ; ASM: jne .LBB0_5 |
| ; ASM: # BB#2: # %if.end |
| ; ASM: #DEBUG_VALUE: p <- %ESI |
| ; ASM: callq use |
| ; ASM: jmp .LBB0_4 |
| ; ASM: [[p_e1:\.Ltmp[0-9]+]]: |
| ; ASM: .LBB0_3: # %if.else |
| ; ASM: callq barrier |
| ; ASM: .LBB0_4: # %if.end6 |
| ; ASM: xorl %eax, %eax |
| ; ASM: addq $32, %rsp |
| ; ASM: popq %rsi |
| ; ASM: retq |
| ; ASM: .LBB0_5: # %if.then4 |
| ; ASM: [[p_b2:\.Ltmp[0-9]+]]: |
| ; ASM: #DEBUG_VALUE: p <- %ESI |
| ; ASM: callq call_noreturn |
| ; ASM: ud2 |
| ; ASM: .Lfunc_end0: |
| |
| ; ASM: .short {{.*}} # Record length |
| ; ASM: .short 4414 # Record kind: S_LOCAL |
| ; ASM: .long 116 # TypeIndex |
| ; ASM: .short 0 # Flags |
| ; ASM: .asciz "p" |
| ; ASM: .cv_def_range [[p_b1]] [[p_e1]] [[p_b2]] .Lfunc_end0, "A\021\027\000\000\000" |
| ; ASM: .short 2 # Record length |
| ; ASM: .short 4431 # Record kind: S_PROC_ID_END |
| |
| ; OBJ: Local { |
| ; OBJ: Type: int (0x74) |
| ; OBJ: VarName: p |
| ; OBJ: } |
| ; OBJ-NOT: Local { |
| ; OBJ: DefRangeRegister { |
| ; OBJ-NEXT: Register: 23 |
| ; OBJ-NEXT: MayHaveNoName: 0 |
| ; OBJ-NEXT: LocalVariableAddrRange { |
| ; OBJ-NEXT: OffsetStart: .text+0x{{.*}} |
| ; OBJ-NEXT: ISectStart: 0x0 |
| ; OBJ-NEXT: Range: 0x{{.*}} |
| ; OBJ-NEXT: } |
| ; OBJ-NEXT: LocalVariableAddrGap [ |
| ; OBJ-NEXT: GapStartOffset: 0x{{.*}} |
| ; OBJ-NEXT: Range: 0x{{.*}} |
| ; OBJ-NEXT: ] |
| ; OBJ-NEXT: } |
| |
| ; ModuleID = 't.cpp' |
| source_filename = "t.cpp" |
| target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-pc-windows-msvc19.0.24210" |
| |
| ; Function Attrs: nounwind uwtable |
| define i32 @f() local_unnamed_addr #0 !dbg !7 { |
| entry: |
| %call = tail call i32 bitcast (i32 (...)* @barrier to i32 ()*)() #4, !dbg !15 |
| %tobool = icmp eq i32 %call, 0, !dbg !15 |
| br i1 %tobool, label %if.else, label %if.then, !dbg !16 |
| |
| if.then: ; preds = %entry |
| %call1 = tail call i32 bitcast (i32 (...)* @vardef to i32 ()*)() #4, !dbg !17 |
| tail call void @llvm.dbg.value(metadata i32 %call1, i64 0, metadata !12, metadata !18), !dbg !19 |
| %call2 = tail call i32 bitcast (i32 (...)* @barrier to i32 ()*)() #4, !dbg !20 |
| %tobool3 = icmp eq i32 %call2, 0, !dbg !20 |
| br i1 %tobool3, label %if.end, label %if.then4, !dbg !22 |
| |
| if.then4: ; preds = %if.then |
| tail call void @call_noreturn(i32 %call1) #5, !dbg !23 |
| unreachable, !dbg !23 |
| |
| if.end: ; preds = %if.then |
| tail call void @use(i32 %call1) #4, !dbg !24 |
| br label %if.end6, !dbg !25 |
| |
| if.else: ; preds = %entry |
| %call5 = tail call i32 bitcast (i32 (...)* @barrier to i32 ()*)() #4, !dbg !26 |
| br label %if.end6 |
| |
| if.end6: ; preds = %if.else, %if.end |
| ret i32 0, !dbg !28 |
| } |
| |
| declare i32 @barrier(...) local_unnamed_addr #1 |
| |
| declare i32 @vardef(...) local_unnamed_addr #1 |
| |
| ; Function Attrs: noreturn |
| declare void @call_noreturn(i32) local_unnamed_addr #2 |
| |
| declare void @use(i32) local_unnamed_addr #1 |
| |
| ; Function Attrs: nounwind readnone |
| declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3 |
| |
| attributes #0 = { nounwind uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| attributes #2 = { noreturn "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| attributes #3 = { nounwind readnone } |
| attributes #4 = { nounwind } |
| attributes #5 = { noreturn nounwind } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5} |
| !llvm.ident = !{!6} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 4.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) |
| !1 = !DIFile(filename: "t.cpp", directory: "C:\5Csrc\5Cllvm\5Cbuild") |
| !2 = !{} |
| !3 = !{i32 2, !"CodeView", i32 1} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"PIC Level", i32 2} |
| !6 = !{!"clang version 4.0.0 "} |
| !7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 19, type: !8, isLocal: false, isDefinition: true, scopeLine: 19, isOptimized: true, unit: !0, variables: !11) |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{!10} |
| !10 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) |
| !11 = !{!12} |
| !12 = !DILocalVariable(name: "p", scope: !13, file: !1, line: 21, type: !10) |
| !13 = distinct !DILexicalBlock(scope: !14, file: !1, line: 20, column: 18) |
| !14 = distinct !DILexicalBlock(scope: !7, file: !1, line: 20, column: 7) |
| !15 = !DILocation(line: 20, column: 7, scope: !14) |
| !16 = !DILocation(line: 20, column: 7, scope: !7) |
| !17 = !DILocation(line: 21, column: 13, scope: !13) |
| !18 = !DIExpression() |
| !19 = !DILocation(line: 21, column: 9, scope: !13) |
| !20 = !DILocation(line: 22, column: 9, scope: !21) |
| !21 = distinct !DILexicalBlock(scope: !13, file: !1, line: 22, column: 9) |
| !22 = !DILocation(line: 22, column: 9, scope: !13) |
| !23 = !DILocation(line: 23, column: 7, scope: !21) |
| !24 = !DILocation(line: 24, column: 5, scope: !13) |
| !25 = !DILocation(line: 25, column: 3, scope: !13) |
| !26 = !DILocation(line: 26, column: 5, scope: !27) |
| !27 = distinct !DILexicalBlock(scope: !14, file: !1, line: 25, column: 10) |
| !28 = !DILocation(line: 28, column: 3, scope: !7) |
