Re-land "Use the frame index side table for byval and inalloca arguments"
This re-lands r302483. It was not the cause of PR32977.
llvm-svn: 302544
diff --git a/llvm/test/CodeGen/X86/dbg-baseptr.ll b/llvm/test/CodeGen/X86/dbg-baseptr.ll
index fb0da1b..893ca93 100644
--- a/llvm/test/CodeGen/X86/dbg-baseptr.ll
+++ b/llvm/test/CodeGen/X86/dbg-baseptr.ll
@@ -1,4 +1,5 @@
; RUN: llc -o - %s | FileCheck %s
+; RUN: llc -filetype=obj -o - %s | llvm-dwarfdump - | FileCheck %s --check-prefix=DWARF
; This test checks that parameters on the stack pointer are correctly
; referenced by debug info.
target triple = "x86_64--"
@@ -7,24 +8,54 @@
@ptr = external global i32*
%struct.s = type { i32, i32, i32, i32, i32 }
+; Simple case: no FP, use offset from RSP.
+
; CHECK-LABEL: f0:
-; CHECK: DEBUG_VALUE: f:input <- [%RSP+8]
+; CHECK-NOT: pushq
+; CHECK: movl $42, %eax
+; CHECK: retq
define i32 @f0(%struct.s* byval align 8 %input) !dbg !8 {
call void @llvm.dbg.declare(metadata %struct.s* %input, metadata !4, metadata !17), !dbg !18
- ret i32 42
+ ret i32 42, !dbg !18
}
+; DWARF-LABEL: .debug_info contents:
+
+; DWARF-LABEL: DW_TAG_subprogram
+; DWARF: DW_AT_frame_base [DW_FORM_exprloc] (<0x1> 57 )
+; 0x57 -> RSP
+; DWARF: DW_AT_name [DW_FORM_strp] ( {{.*}}"f0")
+; DWARF: DW_TAG_formal_parameter
+; DWARF-NEXT: DW_AT_location [DW_FORM_exprloc] (<0x2> 91 08 )
+; DW_OP_fbreg (0x91) 0x08
+; DWARF-NEXT: DW_AT_name [DW_FORM_strp] ( {{.*}}"input")
+
+
+; Dynamic alloca forces the use of RBP as the base pointer
+
; CHECK-LABEL: f1:
-; CHECK: DEBUG_VALUE: f:input <- [%RBP+16]
+; CHECK: pushq %rbp
+; CHECK: movl $42, %eax
+; CHECK: popq %rbp
+; CHECK: retq
define i32 @f1(%struct.s* byval align 8 %input) !dbg !19 {
%val = load i64, i64* @glob
; this alloca should force FP usage.
%stackspace = alloca i32, i64 %val, align 1
store i32* %stackspace, i32** @ptr
call void @llvm.dbg.declare(metadata %struct.s* %input, metadata !20, metadata !17), !dbg !21
- ret i32 42
+ ret i32 42, !dbg !21
}
+; DWARF-LABEL: DW_TAG_subprogram
+; DWARF: DW_AT_frame_base [DW_FORM_exprloc] (<0x1> 56 )
+; 0x56 -> RBP
+; DWARF: DW_AT_name [DW_FORM_strp] ( {{.*}}"f1")
+; DWARF: DW_TAG_formal_parameter
+; DWARF-NEXT: DW_AT_location [DW_FORM_exprloc] (<0x2> 91 10 )
+; DW_OP_fbreg (0x91) 0x10
+; DWARF-NEXT: DW_AT_name [DW_FORM_strp] ( {{.*}}"input")
+
; CHECK-LABEL: f2:
; Just check that we are indeed aligning the stack and setting up a base pointer
; in RBX.
@@ -34,17 +65,24 @@
; CHECK: andq $-64, %rsp
; CHECK: subq $64, %rsp
; CHECK: movq %rsp, %rbx
-; The parameter should still be referenced through RBP though.
-; CHECK-NOT: DEBUG_VALUE: f:input <- [%RBX
-; CHECK: DEBUG_VALUE: f:input <- [%RBP+16]
define i32 @f2(%struct.s* byval align 8 %input) !dbg !22 {
%val = load i64, i64* @glob
%stackspace = alloca i32, i64 %val, align 64
store i32* %stackspace, i32** @ptr
call void @llvm.dbg.declare(metadata %struct.s* %input, metadata !23, metadata !17), !dbg !24
- ret i32 42
+ ret i32 42, !dbg !24
}
+; "input" should still be referred to through RBP.
+; DWARF-LABEL: DW_TAG_subprogram
+; DWARF: DW_AT_frame_base [DW_FORM_exprloc] (<0x1> 56 )
+; 0x56 -> RBP
+; DWARF: DW_AT_name [DW_FORM_strp] ( {{.*}}"f2")
+; DWARF: DW_TAG_formal_parameter
+; DWARF-NEXT: DW_AT_location [DW_FORM_exprloc] (<0x2> 91 10 )
+; DW_OP_fbreg (0x91) 0x10
+; DWARF-NEXT: DW_AT_name [DW_FORM_strp] ( {{.*}}"input")
+
declare void @llvm.dbg.declare(metadata, metadata, metadata)
!llvm.dbg.cu = !{!2}
@@ -52,7 +90,7 @@
!0 = !{i32 2, !"Dwarf Version", i32 4}
!1 = !{i32 2, !"Debug Info Version", i32 3}
-!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3)
+!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, emissionKind: FullDebug)
!3 = !DIFile(filename: "dbg-baseptr.ll", directory: "/")
!4 = !DILocalVariable(name: "input", arg: 1, scope: !8, file: !3, line: 5, type: !9)
!5 = !{}
@@ -60,7 +98,7 @@
!6 = !DISubroutineType(types: !7)
!7 = !{!10, !9}
-!8 = distinct !DISubprogram(name: "f", file: !3, line: 5, type: !6, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, unit: !2, variables: !5)
+!8 = distinct !DISubprogram(name: "f0", file: !3, line: 5, type: !6, isLocal: false, isDefinition: true, unit: !2, variables: !5)
!9 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s", elements: !11)
!10 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
@@ -74,9 +112,9 @@
!17 = !DIExpression()
!18 = !DILocation(line: 5, scope: !8)
-!19 = distinct !DISubprogram(name: "f", file: !3, line: 5, type: !6, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, unit: !2, variables: !5)
+!19 = distinct !DISubprogram(name: "f1", file: !3, line: 5, type: !6, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, unit: !2, variables: !5)
!20 = !DILocalVariable(name: "input", arg: 1, scope: !19, file: !3, line: 5, type: !9)
!21 = !DILocation(line: 5, scope: !19)
-!22 = distinct !DISubprogram(name: "f", file: !3, line: 5, type: !6, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, unit: !2, variables: !5)
+!22 = distinct !DISubprogram(name: "f2", file: !3, line: 5, type: !6, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, unit: !2, variables: !5)
!23 = !DILocalVariable(name: "input", arg: 1, scope: !22, file: !3, line: 5, type: !9)
!24 = !DILocation(line: 5, scope: !22)