1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
; RUN: opt %s -sroa -verify -S -o - | FileCheck %s
; From:
; struct prog_src_register {
; unsigned : 4;
; int Index : 12 + 1;
; unsigned : 12;
; unsigned : 4;
; int : 12 + 1
; } src_reg_for_float() {
; struct prog_src_register a;
; memset(&a, 0, sizeof(a));
; int local = a.Index;
; return a;
; }
; ModuleID = 'pr22495.c'
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; When SROA is creating new smaller allocas, it may add padding.
;
; There should be no debug info for the padding.
; CHECK-NOT: DW_OP_bit_piece, 56
; CHECK: MDExpression(DW_OP_bit_piece, 32, 24)
; CHECK-NOT: DW_OP_bit_piece, 56
; CHECK: MDExpression(DW_OP_bit_piece, 0, 32)
; CHECK-NOT: DW_OP_bit_piece, 56
%struct.prog_src_register = type { i32, i24 }
; Function Attrs: nounwind
define i64 @src_reg_for_float() #0 {
entry:
%retval = alloca %struct.prog_src_register, align 4
%a = alloca %struct.prog_src_register, align 4
%local = alloca i32, align 4
call void @llvm.dbg.declare(metadata %struct.prog_src_register* %a, metadata !16, metadata !17), !dbg !18
%0 = bitcast %struct.prog_src_register* %a to i8*, !dbg !19
call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 8, i32 4, i1 false), !dbg !19
call void @llvm.dbg.declare(metadata i32* %local, metadata !20, metadata !17), !dbg !21
%1 = bitcast %struct.prog_src_register* %a to i32*, !dbg !21
%bf.load = load i32, i32* %1, align 4, !dbg !21
%bf.shl = shl i32 %bf.load, 15, !dbg !21
%bf.ashr = ashr i32 %bf.shl, 19, !dbg !21
store i32 %bf.ashr, i32* %local, align 4, !dbg !21
%2 = bitcast %struct.prog_src_register* %retval to i8*, !dbg !22
%3 = bitcast %struct.prog_src_register* %a to i8*, !dbg !22
call void @llvm.memcpy.p0i8.p0i8.i64(i8* %2, i8* %3, i64 8, i32 4, i1 false), !dbg !22
%4 = bitcast %struct.prog_src_register* %retval to i64*, !dbg !22
%5 = load i64, i64* %4, align 1, !dbg !22
ret i64 %5, !dbg !22
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
; Function Attrs: nounwind
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) #2
; Function Attrs: nounwind
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i32, i1) #2
attributes #0 = { nounwind }
attributes #1 = { nounwind readnone }
attributes #2 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!13, !14}
!llvm.ident = !{!15}
!0 = !MDCompileUnit(language: DW_LANG_C99, producer: "clang version 3.7.0 ", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
!1 = !MDFile(filename: "<stdin>", directory: "")
!2 = !{}
!3 = !{!4}
!4 = !MDSubprogram(name: "src_reg_for_float", line: 7, isLocal: false, isDefinition: true, isOptimized: false, scopeLine: 7, file: !5, scope: !6, type: !7, function: i64 ()* @src_reg_for_float, variables: !2)
!5 = !MDFile(filename: "pr22495.c", directory: "")
!6 = !MDFile(filename: "pr22495.c", directory: "")
!7 = !MDSubroutineType(types: !8)
!8 = !{!9}
!9 = !MDCompositeType(tag: DW_TAG_structure_type, name: "prog_src_register", line: 1, size: 64, align: 32, file: !5, elements: !10)
!10 = !{!11}
!11 = !MDDerivedType(tag: DW_TAG_member, name: "Index", line: 3, size: 13, align: 32, offset: 4, file: !5, scope: !9, baseType: !12)
!12 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!13 = !{i32 2, !"Dwarf Version", i32 4}
!14 = !{i32 2, !"Debug Info Version", i32 3}
!15 = !{!"clang version 3.7.0 "}
!16 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "a", line: 8, scope: !4, file: !6, type: !9)
!17 = !MDExpression()
!18 = !MDLocation(line: 8, scope: !4)
!19 = !MDLocation(line: 9, scope: !4)
!20 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "local", line: 10, scope: !4, file: !6, type: !12)
!21 = !MDLocation(line: 10, scope: !4)
!22 = !MDLocation(line: 11, scope: !4)
|
