Hello Experts,
I'm trying to get the location of used variables inside the function pass.
For example the output should be: variable name = [line numbers where
they are used]
Output:
a = [5,7]
b= [6,8]
C code
void bar() {
int a = 10; //line 2
int b = 20; //line 3
a = a + 5; //line 5
b = b + 1; //line 6
a++; //line 7
b--; //line 8
}
LLVM IR
define dso_local void @bar() #0 !dbg !7 {
%1 = alloca i32, align 4
%2 = alloca i32, align 4
call void @llvm.dbg.declare(metadata i32* %1, metadata !11, metadata
!DIExpression()), !dbg !13
store i32 10, i32* %1, align 4, !dbg !13
call void @llvm.dbg.declare(metadata i32* %2, metadata !14, metadata
!DIExpression()), !dbg !15
store i32 20, i32* %2, align 4, !dbg !15
%3 = load i32, i32* %1, align 4, !dbg !16
%4 = add nsw i32 %3, 5, !dbg !17
store i32 %4, i32* %1, align 4, !dbg !18
%5 = load i32, i32* %2, align 4, !dbg !19
%6 = add nsw i32 %5, 1, !dbg !20
store i32 %6, i32* %2, align 4, !dbg !21
%7 = load i32, i32* %1, align 4, !dbg !22
%8 = add nsw i32 %7, 1, !dbg !22
store i32 %8, i32* %1, align 4, !dbg !22
%9 = load i32, i32* %2, align 4, !dbg !23
%10 = add nsw i32 %9, -1, !dbg !23
store i32 %10, i32* %2, align 4, !dbg !23
ret void, !dbg !24
}
!11 = !DILocalVariable(name: "a", scope: !7, file: !8, line: 2, type: !12)
!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!13 = !DILocation(line: 2, column: 9, scope: !7)
!14 = !DILocalVariable(name: "b", scope: !7, file: !8, line: 3, type: !12)
!15 = !DILocation(line: 3, column: 9, scope: !7)
!16 = !DILocation(line: 5, column: 9, scope: !7)
!17 = !DILocation(line: 5, column: 11, scope: !7)
!18 = !DILocation(line: 5, column: 7, scope: !7)
!19 = !DILocation(line: 6, column: 9, scope: !7)
!20 = !DILocation(line: 6, column: 11, scope: !7)
!21 = !DILocation(line: 6, column: 7, scope: !7)
!22 = !DILocation(line: 7, column: 6, scope: !7)
!23 = !DILocation(line: 8, column: 6, scope: !7)
!24 = !DILocation(line: 9, column: 1, scope: !7)
Thanks.
Hello
Team,
I'm trying to get the location of used variables inside the function
pass. For example the output should be: variable name = [line numbers
where they are used]
a = [5,7]
b= [6,8]
C code
void
bar() {
int a = 10;
//line 2
int b = 20;
//line 3
a = a + 5;
//line 5
b = b + 1; //line
6
a++;
//line 7
b--;
//line 8
}
LLVM IR
define
dso_local void @bar() #0 !dbg !7 {
%1 = alloca i32, align 4
%2 = alloca i32, align 4
call void @llvm.dbg.declare(metadata i32* %1,
metadata !11, metadata !DIExpression()), !dbg !13
store i32 10, i32* %1, align 4, !dbg !13
call void @llvm.dbg.declare(metadata i32* %2,
metadata !14, metadata !DIExpression()), !dbg !15
store i32 20, i32* %2, align 4, !dbg !15
%3 = load i32, i32* %1, align 4, !dbg !16
%4 = add nsw i32 %3, 5, !dbg !17
store i32 %4, i32* %1, align 4, !dbg !18
%5 = load i32, i32* %2, align 4, !dbg !19
%6 = add nsw i32 %5, 1, !dbg !20
store i32 %6, i32* %2, align 4, !dbg !21
%7 = load i32, i32* %1, align 4, !dbg !22
%8 = add nsw i32 %7, 1, !dbg !22
store i32 %8, i32* %1, align 4, !dbg !22
%9 = load i32, i32* %2, align 4, !dbg !23
%10 = add nsw i32 %9, -1, !dbg !23
store i32 %10, i32* %2, align 4, !dbg !23
ret void, !dbg !24
}
!11
= !DILocalVariable(name: "a", scope: !7, file: !8, line: 2, type:
!12)
!12
= !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!13
= !DILocation(line: 2, column: 9, scope: !7)
!14
= !DILocalVariable(name: "b", scope: !7, file: !8, line: 3, type:
!12)
!15
= !DILocation(line: 3, column: 9, scope: !7)
!16
= !DILocation(line: 5, column: 9, scope: !7)
!17
= !DILocation(line: 5, column: 11, scope: !7)
!18
= !DILocation(line: 5, column: 7, scope: !7)
!19
= !DILocation(line: 6, column: 9, scope: !7)
!20
= !DILocation(line: 6, column: 11, scope: !7)
!21
= !DILocation(line: 6, column: 7, scope: !7)
!22
= !DILocation(line: 7, column: 6, scope: !7)
!23
= !DILocation(line: 8, column: 6, scope: !7)
!24
= !DILocation(line: 9, column: 1, scope: !7)
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