# RUN: llc -mtriple=x86_64-- -run-pass livedebugvalues -o - %s | FileCheck %s --implicit-check-not=DBG_VALUE_LIST | |
# | |
# Test a series of joins, where: | |
# * The locations agree, although registers have changed, | |
# * A register down one of the predecessors has been def'd, | |
# * The register operands to DBG_VALUE_LIST have been swapped, | |
# * A spurious additional operand has been added to one path, | |
# * The expressions are not the same (plus -> minus). | |
# | |
# Each join block below checks for one DBG_VALUE_LIST: either we re-state the var | |
# location in a block for the next test, or it's created as a live-in and we | |
# use that for the next test. Two DBG_VALUE_LISTs in a block would represent | |
# a live-in that we didn't expect, and a test failure. | |
# | |
# Each conditional block should have at least one, possibly two. | |
# | |
# CHECK: ![[VAR:[0-9]+]] = !DILocalVariable(name: "c" | |
# | |
# CHECK-LABEL: bb.0.entry: | |
# CHECK: DBG_VALUE_LIST ![[VAR]], | |
# CHECK-LABEL: bb.1: | |
# CHECK: DBG_VALUE_LIST ![[VAR]], | |
# CHECK: DBG_VALUE_LIST ![[VAR]], | |
# CHECK-LABEL: bb.2: | |
# CHECK: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0, | |
# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi | |
# CHECK-LABEL: bb.3: | |
# CHECK: DBG_VALUE_LIST ![[VAR]], | |
# CHECK-LABEL: bb.4: | |
# CHECK: DBG_VALUE_LIST ![[VAR]], | |
# CHECK-SAME: $rdi, $rsi | |
# CHECK-LABEL: bb.5: | |
# CHECK: DBG_VALUE_LIST ![[VAR]], | |
# CHECK: DBG_VALUE_LIST ![[VAR]], | |
# CHECK-SAME: $rsi, $rdi | |
# CHECK-LABEL: bb.6: | |
# CHECK: DBG_VALUE_LIST ![[VAR]], | |
# CHECK-LABEL: bb.7: | |
# CHECK: DBG_VALUE_LIST ![[VAR]], | |
# CHECK: DBG_VALUE_LIST ![[VAR]], | |
# CHECK-SAME: $rdi, $rsi, $rax | |
# CHECK-LABEL: bb.8: | |
# CHECK: DBG_VALUE_LIST ![[VAR]], | |
# CHECK-LABEL: bb.9: | |
# CHECK: DBG_VALUE_LIST ![[VAR]], | |
# CHECK: DBG_VALUE_LIST ![[VAR]], | |
# CHECK-SAME: DW_OP_minus | |
# CHECK-LABEL: bb.10: | |
--- | | |
; ModuleID = 'test.cpp' | |
source_filename = "test.cpp" | |
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" | |
target triple = "x86_64-unknown-linux-gnu" | |
; Function Attrs: norecurse nounwind readnone uwtable | |
define dso_local i32 @_Z3fooii(i32 %a, i32 %b) local_unnamed_addr !dbg !7 { | |
entry: | |
ret i32 0, !dbg !17 | |
} | |
; Function Attrs: nounwind readnone speculatable willreturn | |
declare void @llvm.dbg.value(metadata, metadata, metadata) | |
!llvm.dbg.cu = !{!0} | |
!llvm.module.flags = !{!3, !4, !5} | |
!llvm.ident = !{!6} | |
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None) | |
!1 = !DIFile(filename: "test.cpp", directory: "/") | |
!2 = !{} | |
!3 = !{i32 7, !"Dwarf Version", i32 4} | |
!4 = !{i32 2, !"Debug Info Version", i32 3} | |
!5 = !{i32 1, !"wchar_size", i32 4} | |
!6 = !{!"clang version 11.0.0"} | |
!7 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooii", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11) | |
!8 = !DISubroutineType(types: !9) | |
!9 = !{!10, !10, !10} | |
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) | |
!11 = !{!12, !13, !14} | |
!12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 2, type: !10) | |
!13 = !DILocalVariable(name: "b", arg: 2, scope: !7, file: !1, line: 2, type: !10) | |
!14 = !DILocalVariable(name: "c", scope: !7, file: !1, line: 3, type: !10) | |
!15 = !DILocation(line: 0, scope: !7) | |
!16 = !DILocation(line: 4, column: 12, scope: !7) | |
!17 = !DILocation(line: 4, column: 3, scope: !7) | |
... | |
--- | |
name: _Z3fooii | |
body: | | |
bb.0.entry: | |
liveins: $rdi, $rsi | |
DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15 | |
CMP64ri8 $rdi, 0, implicit-def $eflags | |
JCC_1 %bb.2, 4, implicit $eflags | |
bb.1: | |
liveins: $rdi, $rsi | |
$rdi = MOV64ri 0 | |
$rsi = MOV64ri 0 | |
DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15 | |
bb.2: | |
liveins: $rdi, $rsi | |
; Should be a live-in loc here, | |
CMP64ri8 $rdi, 0, implicit-def $eflags | |
JCC_1 %bb.4, 4, implicit $eflags | |
bb.3: | |
liveins: $rdi, $rsi | |
$rsi = MOV64ri 0 | |
bb.4: | |
liveins: $rdi, $rsi | |
; Should _not_ be a live-in loc here. | |
DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15 | |
CMP64ri8 $rdi, 0, implicit-def $eflags | |
JCC_1 %bb.6, 4, implicit $eflags | |
bb.5: | |
liveins: $rdi, $rsi | |
; Flip some args, | |
DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rsi, $rdi, debug-location !15 | |
bb.6: | |
liveins: $rdi, $rsi | |
; Should _not_ be a live-in loc here. | |
$rax = MOV64ri 0 | |
DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15 | |
CMP64ri8 $rdi, 0, implicit-def $eflags | |
JCC_1 %bb.8, 4, implicit $eflags | |
bb.7: | |
liveins: $rdi, $rsi | |
; Add an extra, spurious, unused argument | |
$rax = MOV64ri 1 | |
DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, $rax, debug-location !15 | |
bb.8: | |
liveins: $rdi, $rsi | |
; Should _not_ be a live-in loc here. | |
$rax = MOV64ri 0 | |
DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15 | |
CMP64ri8 $rdi, 0, implicit-def $eflags | |
JCC_1 %bb.10, 4, implicit $eflags | |
bb.9: | |
liveins: $rdi, $rsi | |
; Replace add with sub in the expr | |
$rax = MOV64ri 1 | |
DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_minus), $rdi, $rsi, debug-location !15 | |
bb.10: | |
liveins: $rdi, $rsi | |
; Should _not_ be a live-in loc here. | |
RETQ | |
... | |