d391e4fe84
Be more consistent in the naming convention for the various RET instructions to specify in terms of bitwidth. Helps prevent future scheduler model mismatches like those that were only addressed in D44687. Differential Revision: https://reviews.llvm.org/D113302
86 lines
4.0 KiB
YAML
86 lines
4.0 KiB
YAML
# RUN: llc %s -march=x86-64 -run-pass=livedebugvalues \
|
|
# RUN: -mtriple x86_64-unknown-unknown \
|
|
# RUN: -experimental-debug-variable-locations -o - 2>&1 \
|
|
# RUN: | FileCheck %s
|
|
#
|
|
# Test that memory operands of instructions are interpreted by LiveDebugValues:
|
|
# if an instruction reference is substituted to a memory operand, we should be
|
|
# able to emit a DBG_VALUE referring to its slot.
|
|
#
|
|
# In addition, further instructions that write to the same stack slot should
|
|
# be recognised as clobbering the value in that slot.
|
|
--- |
|
|
define i8 @test(i32 %bar) local_unnamed_addr !dbg !7 {
|
|
entry:
|
|
ret i8 0, !dbg !12
|
|
}
|
|
|
|
declare dso_local void @ext(i64)
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!3, !4, !5, !6}
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
|
|
!1 = !DIFile(filename: "foo.cpp", directory: ".")
|
|
!2 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_signed)
|
|
!3 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!4 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!5 = !{i32 1, !"wchar_size", i32 2}
|
|
!6 = !{i32 7, !"PIC Level", i32 2}
|
|
!7 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: !1, file: !1, line: 6, type: !8, scopeLine: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10)
|
|
!8 = !DISubroutineType(types: !9)
|
|
!9 = !{!2, !2}
|
|
!10 = !{!11}
|
|
!11 = !DILocalVariable(name: "baz", scope: !7, file: !1, line: 7, type: !2)
|
|
!12 = !DILocation(line: 10, scope: !7)
|
|
...
|
|
---
|
|
name: test
|
|
tracksRegLiveness: true
|
|
liveins:
|
|
- { reg: '$rdi', virtual-reg: '' }
|
|
debugValueSubstitutions:
|
|
- { srcinst: 2, srcop: 0, dstinst: 3, dstop: 1000000, subreg: 0 }
|
|
- { srcinst: 4, srcop: 0, dstinst: 5, dstop: 1000000, subreg: 0 }
|
|
stack:
|
|
- { id: 0, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8,
|
|
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
|
|
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
|
|
body: |
|
|
bb.0:
|
|
liveins: $rdi, $rax
|
|
DBG_PHI $rax, 1
|
|
MOV64mr $rsp, 1, $noreg, 16, $noreg, $rdi :: (store 8 into %stack.0)
|
|
$rax = MOV64ri 0, debug-location !12
|
|
INC32m $rsp, 1, $noreg, 4, $noreg, implicit-def dead $eflags, debug-instr-number 3, debug-location !DILocation(line: 0, scope: !7) :: (store (s32) into %stack.0)
|
|
DBG_INSTR_REF 2, 0, !11, !DIExpression(), debug-location !12
|
|
; CHECK: DBG_INSTR_REF 2, 0
|
|
; CHECK-NEXT: DBG_VALUE $rsp
|
|
;; Test that the old value (from the DBG_PHI) is not tracked anywhere. It
|
|
;; should not be considered as being on the stack any more.
|
|
DBG_INSTR_REF 1, 0, !11, !DIExpression(), debug-location !12
|
|
; CHECK: DBG_INSTR_REF 1, 0
|
|
; CHECK-NEXT: DBG_VALUE $noreg
|
|
INC32m $rsp, 1, $noreg, 4, $noreg, implicit-def dead $eflags, debug-location !12 :: (store (s32) into %stack.0)
|
|
;; The above INC32m should be detected as clobbering the stack location,
|
|
;; even though it isn't debug labelled.
|
|
DBG_INSTR_REF 2, 0, !11, !DIExpression(), debug-location !12
|
|
; CHECK: DBG_INSTR_REF 2, 0
|
|
; CHECK-NEXT: DBG_VALUE $noreg
|
|
|
|
;; Store another debug-labelled value to the stack,
|
|
INC32m $rsp, 1, $noreg, 4, $noreg, implicit-def dead $eflags, debug-instr-number 5, debug-location !DILocation(line: 0, scope: !7) :: (store (s32) into %stack.0)
|
|
;; Point the variable at that value.
|
|
DBG_INSTR_REF 4, 0, !11, !DIExpression(), debug-location !12
|
|
; CHECK: DBG_INSTR_REF 4, 0,
|
|
; CHECK-NEXT: DBG_VALUE $rsp
|
|
;; Overwrite the stack: LiveDebugValues should explicitly undef the stack
|
|
;; location with DBG_VALUE $noreg, as DbgEntityHistoryCalculator doesn't
|
|
;; look at the stack.
|
|
INC32m $rsp, 1, $noreg, 4, $noreg, implicit-def dead $eflags, debug-location !DILocation(line: 0, scope: !7) :: (store (s32) into %stack.0)
|
|
; CHECK: INC32m $rsp
|
|
; CHECK-NEXT: DBG_VALUE $noreg
|
|
|
|
$rax = MOV64rm $rsp, 1, $noreg, 8, $noreg :: (load 8 from %stack.0)
|
|
RET64 $rax, debug-location !12
|
|
...
|