unreachable-block-call-site.mir
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# RUN: llc -mtriple=x86_64-pc-linux -debug-entry-values -run-pass=unreachable-mbb-elimination -o - %s | FileCheck %s
# Verify that the call site information for the call residing in the eliminated
# block is removed. This test case would previously trigger an assertion when
# deleting the call instruction.
# CHECK: name: main
# CHECK: callSites: []
--- |
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; Function Attrs: nounwind uwtable
define i32 @main() !dbg !12 {
unreachable
}
declare !dbg !4 void @foo()
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!8, !9, !10}
!llvm.ident = !{!11}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 9.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
!1 = !DIFile(filename: "unreachable.c", directory: "/")
!2 = !{}
!3 = !{!4}
!4 = !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
!5 = !DISubroutineType(types: !6)
!6 = !{null}
!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!8 = !{i32 2, !"Dwarf Version", i32 4}
!9 = !{i32 2, !"Debug Info Version", i32 3}
!10 = !{i32 1, !"wchar_size", i32 4}
!11 = !{!"clang version 9.0.0"}
!12 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 3, type: !13, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!13 = !DISubroutineType(types: !14)
!14 = !{!7}
!15 = distinct !DILexicalBlock(scope: !12, file: !1, line: 4, column: 7)
!16 = !DILocation(line: 4, column: 7, scope: !12)
!17 = !DILocation(line: 5, column: 5, scope: !15)
!18 = !DILocation(line: 6, column: 3, scope: !12)
...
---
name: main
tracksRegLiveness: true
callSites:
- { bb: 1, offset: 0 }
body: |
bb.0:
successors: %bb.2(0x80000000)
frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 16
JMP_1 %bb.2, debug-location !16
bb.1:
CALL64pcrel32 @foo, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, debug-location !17
bb.2:
$eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, debug-location !18
$rcx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !18
CFI_INSTRUCTION def_cfa_offset 8, debug-location !18
RETQ killed $eax, debug-location !18
...