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small fix to closure debuginfo #38483

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merged 1 commit into from
Dec 21, 2016
Merged

small fix to closure debuginfo #38483

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14 changes: 9 additions & 5 deletions src/librustc_trans/mir/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,14 +10,13 @@

use libc::c_uint;
use llvm::{self, ValueRef};
use rustc::ty;
use rustc::ty::{self, layout};
use rustc::mir;
use rustc::mir::tcx::LvalueTy;
use session::config::FullDebugInfo;
use base;
use common::{self, Block, BlockAndBuilder, CrateContext, FunctionContext, C_null};
use debuginfo::{self, declare_local, DebugLoc, VariableAccess, VariableKind, FunctionDebugContext};
use machine;
use type_of;

use syntax_pos::{DUMMY_SP, NO_EXPANSION, COMMAND_LINE_EXPN, BytePos};
Expand Down Expand Up @@ -494,10 +493,15 @@ fn arg_local_refs<'bcx, 'tcx>(bcx: &BlockAndBuilder<'bcx, 'tcx>,
llval
};

let llclosurety = type_of::type_of(bcx.ccx(), closure_ty);
let layout = bcx.ccx().layout_of(closure_ty);
let offsets = match *layout {
layout::Univariant { ref variant, .. } => &variant.offsets[..],
_ => bug!("Closures are only supposed to be Univariant")
};

for (i, (decl, ty)) in mir.upvar_decls.iter().zip(upvar_tys).enumerate() {
let byte_offset_of_var_in_env =
machine::llelement_offset(bcx.ccx(), llclosurety, i);
let byte_offset_of_var_in_env = offsets[i].bytes();


let ops = unsafe {
[llvm::LLVMRustDIBuilderCreateOpDeref(),
Expand Down