c383f4d655
Prior to this patch, variadic DIExpressions (i.e. ones that contain DW_OP_LLVM_arg) could only be created by salvaging debug values to create stack value expressions, resulting in a DBG_VALUE_LIST being created. As of the previous patch in this patch stack, DBG_INSTR_REF's syntax has been changed to match DBG_VALUE_LIST in preparation for supporting variadic expressions. This patch adds some minor changes needed to allow variadic expressions that aren't stack values to exist, and allows variadic expressions that are trivially reduceable to non-variadic expressions to be handled similarly to non-variadic expressions. Reviewed by: jmorse Differential Revision: https://reviews.llvm.org/D133926
150 lines
5.9 KiB
YAML
150 lines
5.9 KiB
YAML
# RUN: llc %s -o - -mtriple=x86_64-unknown-unknown \
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# RUN: -experimental-debug-variable-locations \
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# RUN: -run-pass=phi-node-elimination,livedebugvars,greedy,virtregrewriter \
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# RUN: | FileCheck %s
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#
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# Like phi-through-regalloc.mir, pass a PHI node into register allocation, and
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# test that it correctly comes out, in a stack slot. Fifteen spurious PHIs have
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# been added to force the register allocator to spill one.
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--- |
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; ModuleID = 'promoted.ll'
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source_filename = "test.c"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define dso_local i32 @foo(i32 %bar, i32 %baz) !dbg !7 {
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entry:
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ret i32 0, !dbg !19
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}
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declare dso_local i32 @ext(i32)
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "test.c", directory: ".")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"."}
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!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !10, !10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 2, type: !10)
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!12 = !DILocation(line: 0, scope: !7)
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!13 = !DILocalVariable(name: "baz", arg: 2, scope: !7, file: !1, line: 2, type: !10)
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!14 = !DILocalVariable(name: "either", scope: !7, file: !1, line: 3, type: !10)
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!15 = !DILocation(line: 4, column: 7, scope: !16)
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!16 = distinct !DILexicalBlock(scope: !7, file: !1, line: 4, column: 7)
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!17 = !DILocation(line: 4, column: 7, scope: !7)
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!18 = !DILocation(line: 0, scope: !16)
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!19 = !DILocation(line: 9, column: 3, scope: !7)
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...
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---
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name: foo
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alignment: 16
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tracksRegLiveness: true
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registers:
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- { id: 0, class: gr32 }
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- { id: 1, class: gr32 }
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- { id: 2, class: gr32 }
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- { id: 3, class: gr32 }
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- { id: 4, class: gr32 }
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liveins:
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- { reg: '$edi', virtual-reg: '%1' }
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- { reg: '$esi', virtual-reg: '%2' }
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frameInfo:
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maxAlignment: 1
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hasCalls: true
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machineFunctionInfo: {}
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body: |
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; CHECK-LABEL: bb.0:
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; CHECK: renamable $ebp = COPY $edi
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; CHECK: MOV32mr %stack.1, 1, $noreg, 0, $noreg, killed renamable $ebp
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bb.0:
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successors: %bb.2(0x50000000), %bb.1(0x30000000)
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liveins: $edi, $esi
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DBG_VALUE $edi, $noreg, !11, !DIExpression(), debug-location !12
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DBG_VALUE $esi, $noreg, !13, !DIExpression(), debug-location !12
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%2:gr32 = COPY killed $esi
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%1:gr32 = COPY killed $edi
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ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !15
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%3:gr32 = MOV32r0 implicit-def dead $eflags
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$edi = COPY killed %3, debug-location !15
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CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit killed $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15
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ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !15
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%4:gr32 = COPY killed $eax, debug-location !15
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%10:gr32 = MOV32ri 0
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%11:gr32 = MOV32ri 1
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%12:gr32 = MOV32ri 2
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%13:gr32 = MOV32ri 3
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%14:gr32 = MOV32ri 4
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%15:gr32 = MOV32ri 5
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%16:gr32 = MOV32ri 6
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%17:gr32 = MOV32ri 7
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%18:gr32 = MOV32ri 8
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%19:gr32 = MOV32ri 9
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%20:gr32 = MOV32ri 10
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%21:gr32 = MOV32ri 11
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%22:gr32 = MOV32ri 12
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%23:gr32 = MOV32ri 13
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%24:gr32 = MOV32ri 14
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TEST32rr killed %4, %4, implicit-def $eflags, debug-location !15
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JCC_1 %bb.2, 5, implicit killed $eflags, debug-location !17
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JMP_1 %bb.1, debug-location !17
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bb.1:
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%30:gr32 = MOV32ri 0
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%31:gr32 = MOV32ri 1
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%32:gr32 = MOV32ri 2
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%33:gr32 = MOV32ri 3
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%34:gr32 = MOV32ri 4
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%35:gr32 = MOV32ri 5
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%36:gr32 = MOV32ri 6
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%37:gr32 = MOV32ri 7
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%38:gr32 = MOV32ri 8
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%39:gr32 = MOV32ri 9
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%40:gr32 = MOV32ri 10
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%41:gr32 = MOV32ri 11
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%42:gr32 = MOV32ri 12
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%43:gr32 = MOV32ri 13
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%44:gr32 = MOV32ri 14
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; CHECK-LABEL: bb.2:
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bb.2:
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%0:gr32 = PHI %1, %bb.0, %2, %bb.1, debug-instr-number 1, debug-location !18
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%50:gr32 = PHI %10, %bb.0, %30, %bb.1, debug-location !18
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%51:gr32 = PHI %11, %bb.0, %31, %bb.1, debug-location !18
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%52:gr32 = PHI %12, %bb.0, %32, %bb.1, debug-location !18
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%53:gr32 = PHI %13, %bb.0, %33, %bb.1, debug-location !18
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%54:gr32 = PHI %14, %bb.0, %34, %bb.1, debug-location !18
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%55:gr32 = PHI %15, %bb.0, %35, %bb.1, debug-location !18
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%56:gr32 = PHI %16, %bb.0, %36, %bb.1, debug-location !18
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%57:gr32 = PHI %17, %bb.0, %37, %bb.1, debug-location !18
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%58:gr32 = PHI %18, %bb.0, %38, %bb.1, debug-location !18
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%59:gr32 = PHI %19, %bb.0, %39, %bb.1, debug-location !18
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%60:gr32 = PHI %20, %bb.0, %40, %bb.1, debug-location !18
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%61:gr32 = PHI %21, %bb.0, %41, %bb.1, debug-location !18
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%62:gr32 = PHI %22, %bb.0, %42, %bb.1, debug-location !18
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%63:gr32 = PHI %23, %bb.0, %43, %bb.1, debug-location !18
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%64:gr32 = PHI %24, %bb.0, %44, %bb.1, debug-location !18
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DBG_INSTR_REF !14, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !12
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; CHECK: DBG_PHI %stack.1, 1, 32
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; CHECK: renamable $eax = MOV32rm %stack.1,
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; CHECK: DBG_INSTR_REF {{.+}}, dbg-instr-ref(1, 0)
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$eax = COPY killed %0, debug-location !19
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RET 0, killed $eax, debug-location !19
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...
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