1# Check that llvm can describe a call site parameter which resides in a spill slot. 2# 3# RUN: llc -emit-call-site-info -debug-entry-values -start-after=machineverifier -filetype=obj %s -o - | llvm-dwarfdump - | FileCheck %s 4# 5# Command: 6# $ ~/src/builds/llvm-project-main-RA/bin/clang -g -Xclang -femit-debug-entry-values -O2 -c -o spill.o spill.cc -mllvm -stop-before=machineverifier -o spill.mir 7# 8# Source: 9## extern void callee(int); 10## 11## #define FORCE_SPILL() \ 12## asm volatile("" \ 13## : \ 14## : \ 15## : "rax", "rbx", "rcx", "rdx", "rsi", "rdi", "rbp", "r8", "r9", \ 16## "r10", "r11", "r12", "r13", "r14", "r15") 17## 18## __attribute__((disable_tail_calls)) void caller(int x) { 19## FORCE_SPILL(); 20## callee(x); 21## } 22 23# CHECK-LABEL: DW_TAG_call_site_parameter 24# CHECK-NEXT: DW_AT_location (DW_OP_reg5 RDI) 25# CHECK-NEXT: DW_AT_call_value (DW_OP_fbreg -44, DW_OP_deref_size 0x4) 26 27--- | 28 ; ModuleID = 'spill.cc' 29 source_filename = "spill.cc" 30 target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 31 target triple = "x86_64-apple-macosx10.14.0" 32 33 ; Function Attrs: ssp uwtable 34 define void @_Z6calleri(i32 %x) local_unnamed_addr #0 !dbg !13 { 35 entry: 36 call void @llvm.dbg.value(metadata i32 %x, metadata !15, metadata !DIExpression()), !dbg !16 37 call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"(), !dbg !17, !srcloc !18 38 call void @_Z6calleei(i32 %x), !dbg !19 39 ret void, !dbg !20 40 } 41 42 declare !dbg !4 void @_Z6calleei(i32) local_unnamed_addr 43 44 ; Function Attrs: nounwind readnone speculatable willreturn 45 declare void @llvm.dbg.value(metadata, metadata, metadata) 46 47 ; Function Attrs: nounwind 48 declare void @llvm.stackprotector(ptr, ptr) 49 50 attributes #0 = { "disable-tail-calls"="true" "frame-pointer"="all" } 51 52 !llvm.dbg.cu = !{!0} 53 !llvm.module.flags = !{!8, !9, !10, !11} 54 !llvm.ident = !{!12} 55 56 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 10.0.0 (git@github.com:llvm/llvm-project.git 132f768649d8f21d577ee220e5e084904874cb3d)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None) 57 !1 = !DIFile(filename: "spill.cc", directory: "/Users/vsk/tmp/param-analysis") 58 !2 = !{} 59 !3 = !{!4} 60 !4 = !DISubprogram(name: "callee", linkageName: "_Z6calleei", scope: !1, file: !1, line: 1, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2) 61 !5 = !DISubroutineType(types: !6) 62 !6 = !{null, !7} 63 !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 64 !8 = !{i32 2, !"Dwarf Version", i32 4} 65 !9 = !{i32 2, !"Debug Info Version", i32 3} 66 !10 = !{i32 1, !"wchar_size", i32 4} 67 !11 = !{i32 7, !"PIC Level", i32 2} 68 !12 = !{!"clang version 10.0.0 (git@github.com:llvm/llvm-project.git 132f768649d8f21d577ee220e5e084904874cb3d)"} 69 !13 = distinct !DISubprogram(name: "caller", linkageName: "_Z6calleri", scope: !1, file: !1, line: 10, type: !5, scopeLine: 10, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !14) 70 !14 = !{!15} 71 !15 = !DILocalVariable(name: "x", arg: 1, scope: !13, file: !1, line: 10, type: !7) 72 !16 = !DILocation(line: 0, scope: !13) 73 !17 = !DILocation(line: 11, column: 3, scope: !13) 74 !18 = !{i32 -2147469811} 75 !19 = !DILocation(line: 12, column: 3, scope: !13) 76 !20 = !DILocation(line: 13, column: 1, scope: !13) 77 78... 79--- 80name: _Z6calleri 81alignment: 16 82exposesReturnsTwice: false 83legalized: false 84regBankSelected: false 85selected: false 86failedISel: false 87tracksRegLiveness: true 88hasWinCFI: false 89registers: [] 90liveins: 91 - { reg: '$edi', virtual-reg: '' } 92frameInfo: 93 isFrameAddressTaken: false 94 isReturnAddressTaken: false 95 hasStackMap: false 96 hasPatchPoint: false 97 stackSize: 56 98 offsetAdjustment: -56 99 maxAlignment: 4 100 adjustsStack: true 101 hasCalls: true 102 stackProtector: '' 103 maxCallFrameSize: 0 104 cvBytesOfCalleeSavedRegisters: 40 105 hasOpaqueSPAdjustment: false 106 hasVAStart: false 107 hasMustTailInVarArgFunc: false 108 localFrameSize: 0 109 savePoint: '' 110 restorePoint: '' 111fixedStack: 112 - { id: 0, type: spill-slot, offset: -56, size: 8, alignment: 8, stack-id: default, 113 callee-saved-register: '$rbx', callee-saved-restored: true, debug-info-variable: '', 114 debug-info-expression: '', debug-info-location: '' } 115 - { id: 1, type: spill-slot, offset: -48, size: 8, alignment: 16, stack-id: default, 116 callee-saved-register: '$r12', callee-saved-restored: true, debug-info-variable: '', 117 debug-info-expression: '', debug-info-location: '' } 118 - { id: 2, type: spill-slot, offset: -40, size: 8, alignment: 8, stack-id: default, 119 callee-saved-register: '$r13', callee-saved-restored: true, debug-info-variable: '', 120 debug-info-expression: '', debug-info-location: '' } 121 - { id: 3, type: spill-slot, offset: -32, size: 8, alignment: 16, stack-id: default, 122 callee-saved-register: '$r14', callee-saved-restored: true, debug-info-variable: '', 123 debug-info-expression: '', debug-info-location: '' } 124 - { id: 4, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: default, 125 callee-saved-register: '$r15', callee-saved-restored: true, debug-info-variable: '', 126 debug-info-expression: '', debug-info-location: '' } 127 - { id: 5, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default, 128 callee-saved-register: '', callee-saved-restored: true, debug-info-variable: '', 129 debug-info-expression: '', debug-info-location: '' } 130stack: 131 - { id: 0, name: '', type: spill-slot, offset: -60, size: 4, alignment: 4, 132 stack-id: default, callee-saved-register: '', callee-saved-restored: true, 133 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } 134callSites: 135 - { bb: 0, offset: 23, fwdArgRegs: 136 - { arg: 0, reg: '$edi' } } 137constants: [] 138machineFunctionInfo: {} 139body: | 140 bb.0.entry: 141 liveins: $edi, $r15, $r14, $r13, $r12, $rbx 142 143 DBG_VALUE $edi, $noreg, !15, !DIExpression(), debug-location !16 144 frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp 145 CFI_INSTRUCTION def_cfa_offset 16 146 CFI_INSTRUCTION offset $rbp, -16 147 $rbp = frame-setup MOV64rr $rsp 148 CFI_INSTRUCTION def_cfa_register $rbp 149 frame-setup PUSH64r killed $r15, implicit-def $rsp, implicit $rsp 150 frame-setup PUSH64r killed $r14, implicit-def $rsp, implicit $rsp 151 frame-setup PUSH64r killed $r13, implicit-def $rsp, implicit $rsp 152 frame-setup PUSH64r killed $r12, implicit-def $rsp, implicit $rsp 153 frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp 154 frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp 155 CFI_INSTRUCTION offset $rbx, -56 156 CFI_INSTRUCTION offset $r12, -48 157 CFI_INSTRUCTION offset $r13, -40 158 CFI_INSTRUCTION offset $r14, -32 159 CFI_INSTRUCTION offset $r15, -24 160 MOV32mr $rbp, 1, $noreg, -44, $noreg, $edi :: (store (s32) into %stack.0) 161 DBG_VALUE $rbp, 0, !15, !DIExpression(DW_OP_constu, 44, DW_OP_minus), debug-location !16 162 INLINEASM &"", 1, 12, implicit-def dead early-clobber $rax, 12, implicit-def dead early-clobber $rbx, 12, implicit-def dead early-clobber $rcx, 12, implicit-def dead early-clobber $rdx, 12, implicit-def dead early-clobber $rsi, 12, implicit-def dead early-clobber $rdi, 12, implicit-def early-clobber $rbp, 12, implicit-def dead early-clobber $r8, 12, implicit-def dead early-clobber $r9, 12, implicit-def dead early-clobber $r10, 12, implicit-def dead early-clobber $r11, 12, implicit-def dead early-clobber $r12, 12, implicit-def dead early-clobber $r13, 12, implicit-def dead early-clobber $r14, 12, implicit-def dead early-clobber $r15, 12, implicit-def dead early-clobber $df, 12, implicit-def early-clobber $fpsw, 12, implicit-def dead early-clobber $eflags, !18, debug-location !17 163 DBG_VALUE $edi, $noreg, !15, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !16 164 $edi = MOV32rm $rbp, 1, $noreg, -44, $noreg :: (load (s32) from %stack.0) 165 DBG_VALUE $edi, $noreg, !15, !DIExpression(), debug-location !16 166 CALL64pcrel32 @_Z6calleei, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, debug-location !19 167 DBG_VALUE $edi, $noreg, !15, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !16 168 $rsp = frame-destroy ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !20 169 $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !20 170 $r12 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !20 171 $r13 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !20 172 $r14 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !20 173 $r15 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !20 174 $rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !20 175 RET64 debug-location !20 176 177... 178