Hello All,
I read the documentation and I was able to fetch the variable names and
source locations attached to metadata for call instructions
(@llvm.dbg.declare) using dyn_cast<DbgVariableIntrinsic>. I wanted to check
if we could fetch the variable names in the load/gep instructors using
debugInfo. I want to collect the use variable object details within the
function.
I could only fetch the source locations (not the variable names) using !dbg
attached to the load instructions. Any pointers if that is allowed.
*C code:*
int foo (bar_t *b, int len)
{
if (b == (bar_t *)NULL) {
return 0;
}
return -1;
}
*IR optimised code through LTO:*
; Function Attrs: noinline nounwind optnone uwtable
define i32 @foo(%struct.bar_t*, i32) #0 !dbg !10 {
%3 = load i64, i64* getelementptr inbounds ([1 x i64], [1 x i64]
%4 = add i64 %3, 1
%5 = alloca i32, align 4
%6 = alloca % struct.bar_t*, align 8
%7 = alloca i32, align 4
store % struct.bar_t* %0, % struct.bar_t** %6, align 8
call void @llvm.dbg.declare(metadata % struct.bar_t** %6, metadata !11,
metadata !DIExpression()), !dbg !12
store i32 %1, i32* %7, align 4
call void @llvm.dbg.declare(metadata i32* %7, metadata !12, metadata
!DIExpression()), !dbg !14
%8 = load % struct.bar_t*, % struct.bar_t** %6, align 8, !dbg !15
%9 = icmp eq % struct.bar_t* %8, null, !dbg !16
br i1 %9, label %10, label %11, !dbg !17
Many Thanks.
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