1; RUN: llc < %s -experimental-debug-variable-locations=true | FileCheck %s 2; RUN: llc < %s -filetype=obj -experimental-debug-variable-locations=true | llvm-dwarfdump - | FileCheck %s --check-prefix=DWARF 3 4; This test creates two UserValues in LiveDebugVariables with one location 5; each. x must be spilled, but y will be allocated to a CSR. x's location 6; should be indirect, but y's should be direct. 7 8; C source: 9; #define FORCE_SPILL() \ 10; __asm volatile("" : : : \ 11; "rax", "rbx", "rcx", "rdx", "rsi", "rdi", "rbp", "r8", \ 12; "r9", "r10", "r11", "r12", "r13", "r14", "r15") 13; int g(int); 14; int f() { 15; int x = g(0); 16; FORCE_SPILL(); 17; int y = g(0); 18; g(y); 19; g(y); 20; g(y); 21; return x + y; 22; } 23 24; CHECK-LABEL: f: # @f 25; CHECK: callq g 26; CHECK: movl %eax, [[X_OFFS:[0-9]+]](%rsp) # 4-byte Spill 27; CHECK: #DEBUG_VALUE: f:x <- [DW_OP_plus_uconst [[X_OFFS]], DW_OP_deref] $rsp 28; CHECK: #APP 29; CHECK: #NO_APP 30; CHECK: callq g 31; CHECK: movl %eax, %[[CSR:[^ ]*]] 32; CHECK: #DEBUG_VALUE: f:y <- $esi 33; CHECK: movl %eax, %ecx 34; CHECK: callq g 35; CHECK: movl %[[CSR]], %ecx 36; CHECK: callq g 37; CHECK: movl %[[CSR]], %ecx 38; CHECK: callq g 39; CHECK: movl [[X_OFFS]](%rsp), %eax # 4-byte Reload 40;; Variable value remains on stack, location left pointing there. 41; CHECK: addl %[[CSR]], %eax 42 43; DWARF: DW_TAG_variable 44; DWARF-NEXT: DW_AT_location ( 45; DWARF-NEXT: [{{.*}}, {{.*}}): DW_OP_breg7 RSP+36) 46; DWARF-NEXT: DW_AT_name ("x") 47 48; DWARF: DW_TAG_variable 49; DWARF-NEXT: DW_AT_location ( 50; DWARF-NEXT: [{{.*}}, {{.*}}): DW_OP_reg4 RSI) 51; DWARF-NEXT: DW_AT_name ("y") 52 53; ModuleID = 'spill-nospill.c' 54source_filename = "spill-nospill.c" 55target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128" 56target triple = "x86_64-pc-windows-msvc19.0.24215" 57 58; Function Attrs: nounwind uwtable 59define i32 @f() local_unnamed_addr #0 !dbg !8 { 60entry: 61 %call = tail call i32 @g(i32 0) #3, !dbg !15 62 tail call void @llvm.dbg.value(metadata i32 %call, metadata !13, metadata !DIExpression()), !dbg !16 63 tail call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"() #3, !dbg !17, !srcloc !18 64 %call1 = tail call i32 @g(i32 0) #3, !dbg !19 65 tail call void @llvm.dbg.value(metadata i32 %call1, metadata !14, metadata !DIExpression()), !dbg !20 66 %call2 = tail call i32 @g(i32 %call1) #3, !dbg !21 67 %call3 = tail call i32 @g(i32 %call1) #3, !dbg !22 68 %call4 = tail call i32 @g(i32 %call1) #3, !dbg !23 69 %add = add nsw i32 %call1, %call, !dbg !24 70 ret i32 %add, !dbg !25 71} 72 73declare i32 @g(i32) local_unnamed_addr #1 74 75; Function Attrs: nounwind readnone speculatable 76declare void @llvm.dbg.value(metadata, metadata, metadata) #2 77 78attributes #0 = { nounwind uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "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" } 79attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "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" } 80attributes #2 = { nounwind readnone speculatable } 81attributes #3 = { nounwind } 82 83!llvm.dbg.cu = !{!0} 84!llvm.module.flags = !{!3, !4, !5, !6} 85!llvm.ident = !{!7} 86 87!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 88!1 = !DIFile(filename: "spill-nospill.c", directory: "C:\5Csrc\5Cllvm-project\5Cbuild") 89!2 = !{} 90!3 = !{i32 2, !"Dwarf Version", i32 4} 91!4 = !{i32 2, !"Debug Info Version", i32 3} 92!5 = !{i32 1, !"wchar_size", i32 2} 93!6 = !{i32 7, !"PIC Level", i32 2} 94!7 = !{!"clang version 6.0.0 "} 95!8 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 8, type: !9, isLocal: false, isDefinition: true, scopeLine: 8, isOptimized: true, unit: !0, retainedNodes: !12) 96!9 = !DISubroutineType(types: !10) 97!10 = !{!11} 98!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 99!12 = !{!13, !14} 100!13 = !DILocalVariable(name: "x", scope: !8, file: !1, line: 9, type: !11) 101!14 = !DILocalVariable(name: "y", scope: !8, file: !1, line: 11, type: !11) 102!15 = !DILocation(line: 9, column: 11, scope: !8) 103!16 = !DILocation(line: 9, column: 7, scope: !8) 104!17 = !DILocation(line: 10, column: 3, scope: !8) 105!18 = !{i32 -2147472112} 106!19 = !DILocation(line: 11, column: 11, scope: !8) 107!20 = !DILocation(line: 11, column: 7, scope: !8) 108!21 = !DILocation(line: 12, column: 3, scope: !8) 109!22 = !DILocation(line: 13, column: 3, scope: !8) 110!23 = !DILocation(line: 14, column: 3, scope: !8) 111!24 = !DILocation(line: 15, column: 12, scope: !8) 112!25 = !DILocation(line: 15, column: 3, scope: !8) 113