diff --git a/src/librustc/lib.rs b/src/librustc/lib.rs
index 3988545c201e0ad7fd62e18ba2196e7c47186941..d2ca1cd3f9339ca1a206d2a3dca1b6892bb734be 100644
--- a/src/librustc/lib.rs
+++ b/src/librustc/lib.rs
@@ -73,7 +73,6 @@
 pub mod diagnostics;
 
 pub mod back {
-    pub use rustc_back::abi;
     pub use rustc_back::rpath;
     pub use rustc_back::svh;
 }
diff --git a/src/librustc_back/abi.rs b/src/librustc_back/abi.rs
deleted file mode 100644
index c3a3a8d582aff91f2fc400141e0b57d16d605234..0000000000000000000000000000000000000000
--- a/src/librustc_back/abi.rs
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-pub const BOX_FIELD_DROP_GLUE: usize = 1;
-pub const BOX_FIELD_BODY: usize = 4;
-
-/// The first half of a fat pointer.
-/// - For a closure, this is the code address.
-/// - For an object or trait instance, this is the address of the box.
-/// - For a slice, this is the base address.
-pub const FAT_PTR_ADDR: usize = 0;
-
-/// The second half of a fat pointer.
-/// - For a closure, this is the address of the environment.
-/// - For an object or trait instance, this is the address of the vtable.
-/// - For a slice, this is the length.
-pub const FAT_PTR_EXTRA: usize = 1;
diff --git a/src/librustc_back/lib.rs b/src/librustc_back/lib.rs
index 2b677d665d4f3355ed013bb12abad9a72a9d0aac..3ffc031d621f4a2c5f8282b31035be77578f543b 100644
--- a/src/librustc_back/lib.rs
+++ b/src/librustc_back/lib.rs
@@ -48,7 +48,6 @@
 extern crate rustc_front;
 #[macro_use] extern crate log;
 
-pub mod abi;
 pub mod tempdir;
 pub mod rpath;
 pub mod sha2;
diff --git a/src/librustc_trans/lib.rs b/src/librustc_trans/lib.rs
index d7e79e46720b37749bf14110bc5ba8f8bcd2a38e..c8ce09b4d79754d93040182ff98cf2f1b1f41325 100644
--- a/src/librustc_trans/lib.rs
+++ b/src/librustc_trans/lib.rs
@@ -61,7 +61,6 @@
 pub use rustc::util;
 
 pub mod back {
-    pub use rustc_back::abi;
     pub use rustc_back::rpath;
     pub use rustc_back::svh;
 
diff --git a/src/librustc_trans/trans/cabi.rs b/src/librustc_trans/trans/abi.rs
similarity index 93%
rename from src/librustc_trans/trans/cabi.rs
rename to src/librustc_trans/trans/abi.rs
index 5325c667eb683b3f0e0603a1c8ec2455e0eb4b37..9aabceb6b0ee5785b04521adcaff1c0a5653450f 100644
--- a/src/librustc_trans/trans/cabi.rs
+++ b/src/librustc_trans/trans/abi.rs
@@ -1,4 +1,4 @@
-// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
+// Copyright 2012-2016 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
@@ -28,7 +28,19 @@
 
 use middle::ty::{self, Ty};
 
-use syntax::abi::Abi;
+pub use syntax::abi::Abi;
+
+/// The first half of a fat pointer.
+/// - For a closure, this is the code address.
+/// - For an object or trait instance, this is the address of the box.
+/// - For a slice, this is the base address.
+pub const FAT_PTR_ADDR: usize = 0;
+
+/// The second half of a fat pointer.
+/// - For a closure, this is the address of the environment.
+/// - For an object or trait instance, this is the address of the vtable.
+/// - For a slice, this is the length.
+pub const FAT_PTR_EXTRA: usize = 1;
 
 #[derive(Clone, Copy, PartialEq, Debug)]
 pub enum ArgKind {
@@ -130,7 +142,7 @@ pub fn new<'a, 'tcx>(ccx: &CrateContext<'a, 'tcx>,
                          abi: Abi,
                          sig: &ty::FnSig<'tcx>,
                          extra_args: &[Ty<'tcx>]) -> FnType {
-        use syntax::abi::Abi::*;
+        use self::Abi::*;
         let cconv = match ccx.sess().target.target.adjust_abi(abi) {
             RustIntrinsic => {
                 // Intrinsics are emitted at the call site
diff --git a/src/librustc_trans/trans/adt.rs b/src/librustc_trans/trans/adt.rs
index c6c19a2a6c7b25fb262ed3ddd870c40807d058c2..798fbbe8fbf5699e2360feb1680c9629dfef44ff 100644
--- a/src/librustc_trans/trans/adt.rs
+++ b/src/librustc_trans/trans/adt.rs
@@ -48,13 +48,13 @@
 use std::rc::Rc;
 
 use llvm::{ValueRef, True, IntEQ, IntNE};
-use back::abi::FAT_PTR_ADDR;
 use middle::subst;
 use middle::ty::{self, Ty, TyCtxt};
 use syntax::ast;
 use syntax::attr;
 use syntax::attr::IntType;
 use trans::_match;
+use trans::abi::FAT_PTR_ADDR;
 use trans::base::InitAlloca;
 use trans::build::*;
 use trans::cleanup;
diff --git a/src/librustc_trans/trans/attributes.rs b/src/librustc_trans/trans/attributes.rs
index d93d32f8e0d068b327fc411d397372d3cb800403..4bb2b13998f7872eaa48a6be01dc2c7e9fe8f152 100644
--- a/src/librustc_trans/trans/attributes.rs
+++ b/src/librustc_trans/trans/attributes.rs
@@ -15,10 +15,10 @@
 use middle::infer;
 use middle::traits::ProjectionMode;
 use session::config::NoDebugInfo;
-use syntax::abi::Abi;
 pub use syntax::attr::InlineAttr;
 use syntax::ast;
 use rustc_front::hir;
+use trans::abi::Abi;
 use trans::base;
 use trans::common;
 use trans::context::CrateContext;
diff --git a/src/librustc_trans/trans/base.rs b/src/librustc_trans/trans/base.rs
index d177bb396c902e86f33a5b8d6ad48574777b4ae5..69b296edd306975c5de14896d009da8e218b092c 100644
--- a/src/librustc_trans/trans/base.rs
+++ b/src/librustc_trans/trans/base.rs
@@ -30,7 +30,7 @@
 use super::ModuleTranslation;
 
 use back::link::mangle_exported_name;
-use back::{link, abi};
+use back::link;
 use lint;
 use llvm::{BasicBlockRef, Linkage, ValueRef, Vector, get_param};
 use llvm;
@@ -52,6 +52,7 @@
 use session::config::{self, NoDebugInfo, FullDebugInfo};
 use session::Session;
 use trans::_match;
+use trans::abi::{self, Abi};
 use trans::adt;
 use trans::assert_dep_graph;
 use trans::attributes;
@@ -100,7 +101,6 @@
 use std::collections::{HashMap, HashSet};
 use std::str;
 use std::{i8, i16, i32, i64};
-use syntax::abi::Abi;
 use syntax::codemap::{Span, DUMMY_SP};
 use syntax::parse::token::InternedString;
 use syntax::attr::AttrMetaMethods;
diff --git a/src/librustc_trans/trans/cabi_aarch64.rs b/src/librustc_trans/trans/cabi_aarch64.rs
index 745cc3ba6d6f55c9ca93d5913382695a4decc7f4..1004505b3c4a06ac14fecd377be43b284b8cbc6e 100644
--- a/src/librustc_trans/trans/cabi_aarch64.rs
+++ b/src/librustc_trans/trans/cabi_aarch64.rs
@@ -11,7 +11,7 @@
 #![allow(non_upper_case_globals)]
 
 use llvm::{Integer, Pointer, Float, Double, Struct, Array, Vector, Attribute};
-use trans::cabi::{FnType, ArgType};
+use trans::abi::{FnType, ArgType};
 use trans::context::CrateContext;
 use trans::type_::Type;
 
diff --git a/src/librustc_trans/trans/cabi_arm.rs b/src/librustc_trans/trans/cabi_arm.rs
index c65fb588e7218d2572b3e040c747bfaac3051a06..12d6aa6341aa91d536562377dc9eb4dde6f223fa 100644
--- a/src/librustc_trans/trans/cabi_arm.rs
+++ b/src/librustc_trans/trans/cabi_arm.rs
@@ -11,7 +11,7 @@
 #![allow(non_upper_case_globals)]
 
 use llvm::{Integer, Pointer, Float, Double, Struct, Array, Vector, Attribute};
-use trans::cabi::{FnType, ArgType};
+use trans::abi::{FnType, ArgType};
 use trans::context::CrateContext;
 use trans::type_::Type;
 
diff --git a/src/librustc_trans/trans/cabi_asmjs.rs b/src/librustc_trans/trans/cabi_asmjs.rs
index dd62194a892a70888d7fdb5b5cc88aa4f33f8e83..752a7f3ca5c7cc1bc9dee5e1ead1f1607c2eb60d 100644
--- a/src/librustc_trans/trans/cabi_asmjs.rs
+++ b/src/librustc_trans/trans/cabi_asmjs.rs
@@ -11,7 +11,7 @@
 #![allow(non_upper_case_globals)]
 
 use llvm::{Struct, Array, Attribute};
-use trans::cabi::{FnType, ArgType};
+use trans::abi::{FnType, ArgType};
 use trans::context::CrateContext;
 use trans::type_::Type;
 
diff --git a/src/librustc_trans/trans/cabi_mips.rs b/src/librustc_trans/trans/cabi_mips.rs
index 74fdc0828f203fa93a185bd4993ae692284bdccb..1bab2f6e9aedae29d8337be018f030e67f20887f 100644
--- a/src/librustc_trans/trans/cabi_mips.rs
+++ b/src/librustc_trans/trans/cabi_mips.rs
@@ -14,7 +14,7 @@
 use std::cmp;
 use llvm;
 use llvm::{Integer, Pointer, Float, Double, Struct, Array, Vector, Attribute};
-use trans::cabi::{ArgType, FnType};
+use trans::abi::{ArgType, FnType};
 use trans::context::CrateContext;
 use trans::type_::Type;
 
diff --git a/src/librustc_trans/trans/cabi_powerpc.rs b/src/librustc_trans/trans/cabi_powerpc.rs
index 57d49926fae5d2fc8f8edfd1b88c33a5c853e666..0239f9fe928311e3f46331b9e40fadd0a820be7c 100644
--- a/src/librustc_trans/trans/cabi_powerpc.rs
+++ b/src/librustc_trans/trans/cabi_powerpc.rs
@@ -11,7 +11,7 @@
 use libc::c_uint;
 use llvm;
 use llvm::{Integer, Pointer, Float, Double, Struct, Array, Attribute};
-use trans::cabi::{FnType, ArgType};
+use trans::abi::{FnType, ArgType};
 use trans::context::CrateContext;
 use trans::type_::Type;
 
diff --git a/src/librustc_trans/trans/cabi_powerpc64.rs b/src/librustc_trans/trans/cabi_powerpc64.rs
index dd50b1164517d206c614f8c0871f716ddb03d970..842171c0d73ac012faceaed9a746f006d0c37f9b 100644
--- a/src/librustc_trans/trans/cabi_powerpc64.rs
+++ b/src/librustc_trans/trans/cabi_powerpc64.rs
@@ -16,7 +16,7 @@
 // need to be fixed when PowerPC vector support is added.
 
 use llvm::{Integer, Pointer, Float, Double, Struct, Array, Attribute};
-use trans::cabi::{FnType, ArgType};
+use trans::abi::{FnType, ArgType};
 use trans::context::CrateContext;
 use trans::type_::Type;
 
diff --git a/src/librustc_trans/trans/cabi_x86.rs b/src/librustc_trans/trans/cabi_x86.rs
index 81fb9d71210d861cbaaa4d1dd07705ff8572db86..256e656b9b691a2d76b14f230d284c6702f04c7c 100644
--- a/src/librustc_trans/trans/cabi_x86.rs
+++ b/src/librustc_trans/trans/cabi_x86.rs
@@ -9,7 +9,7 @@
 // except according to those terms.
 
 use llvm::*;
-use trans::cabi::{ArgType, FnType};
+use trans::abi::{ArgType, FnType};
 use trans::type_::Type;
 use super::common::*;
 use super::machine::*;
diff --git a/src/librustc_trans/trans/cabi_x86_64.rs b/src/librustc_trans/trans/cabi_x86_64.rs
index 5946aa4a8c3668bfbae737eccd5a1d8f5d2785a3..12fd31cc96e7a9cea5ad93d5ad858df110605913 100644
--- a/src/librustc_trans/trans/cabi_x86_64.rs
+++ b/src/librustc_trans/trans/cabi_x86_64.rs
@@ -16,7 +16,7 @@
 
 use llvm::{Integer, Pointer, Float, Double};
 use llvm::{Struct, Array, Attribute, Vector};
-use trans::cabi::{ArgType, FnType};
+use trans::abi::{ArgType, FnType};
 use trans::context::CrateContext;
 use trans::type_::Type;
 
diff --git a/src/librustc_trans/trans/cabi_x86_win64.rs b/src/librustc_trans/trans/cabi_x86_win64.rs
index 21c746a1e88967729b904e084223727317dc70f7..7e887b2ad70ff1d9cacf91f06bcefa42561fca74 100644
--- a/src/librustc_trans/trans/cabi_x86_win64.rs
+++ b/src/librustc_trans/trans/cabi_x86_win64.rs
@@ -11,7 +11,7 @@
 use llvm::*;
 use super::common::*;
 use super::machine::*;
-use trans::cabi::{ArgType, FnType};
+use trans::abi::{ArgType, FnType};
 use trans::type_::Type;
 
 // Win64 ABI: http://msdn.microsoft.com/en-us/library/zthk2dkh.aspx
diff --git a/src/librustc_trans/trans/callee.rs b/src/librustc_trans/trans/callee.rs
index 65724405db1b379d639bb35afc83794bb249983b..4c5386799e9a81757ec98d57e37ea17fcc4227fb 100644
--- a/src/librustc_trans/trans/callee.rs
+++ b/src/librustc_trans/trans/callee.rs
@@ -27,6 +27,7 @@
 use middle::subst::{Substs};
 use middle::traits;
 use rustc::front::map as hir_map;
+use trans::abi::Abi;
 use trans::adt;
 use trans::attributes;
 use trans::base;
@@ -54,7 +55,6 @@
 use middle::ty::{self, Ty, TyCtxt, TypeFoldable};
 use rustc_front::hir;
 
-use syntax::abi::Abi;
 use syntax::ast;
 use syntax::codemap::DUMMY_SP;
 use syntax::errors;
diff --git a/src/librustc_trans/trans/closure.rs b/src/librustc_trans/trans/closure.rs
index bc81b32ae450dcf46ccc861cd5b7a97296edcbd7..d4272e7918502663ac22c6bcbccc6215c27d71dc 100644
--- a/src/librustc_trans/trans/closure.rs
+++ b/src/librustc_trans/trans/closure.rs
@@ -14,6 +14,7 @@
 use middle::def_id::DefId;
 use middle::infer;
 use middle::traits::ProjectionMode;
+use trans::abi::Abi::RustCall;
 use trans::adt;
 use trans::attributes;
 use trans::base::*;
@@ -32,7 +33,6 @@
 use middle::ty;
 use session::config::FullDebugInfo;
 
-use syntax::abi::Abi::RustCall;
 use syntax::ast;
 use syntax::attr::{ThinAttributes, ThinAttributesExt};
 
diff --git a/src/librustc_trans/trans/collector.rs b/src/librustc_trans/trans/collector.rs
index 43d3cde0f687940858bdb316c5f7e6dae97b7a32..3170ee0bf48acc59983900b9b44b4d5ce162c01b 100644
--- a/src/librustc_trans/trans/collector.rs
+++ b/src/librustc_trans/trans/collector.rs
@@ -1261,7 +1261,7 @@ pub fn push_unique_type_name<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>,
                 output.push_str("unsafe ");
             }
 
-            if abi != ::syntax::abi::Abi::Rust {
+            if abi != ::trans::abi::Abi::Rust {
                 output.push_str("extern \"");
                 output.push_str(abi.name());
                 output.push_str("\" ");
diff --git a/src/librustc_trans/trans/common.rs b/src/librustc_trans/trans/common.rs
index 655a57b6f20fb3372b083cdd542248051f435dd1..b9f9004d7ee268199e3afd3fd87fb5a082e78c82 100644
--- a/src/librustc_trans/trans/common.rs
+++ b/src/librustc_trans/trans/common.rs
@@ -22,6 +22,7 @@
 use middle::infer;
 use middle::lang_items::LangItem;
 use middle::subst::Substs;
+use trans::abi::Abi;
 use trans::base;
 use trans::build;
 use trans::builder::Builder;
@@ -49,7 +50,6 @@
 use std::ffi::CString;
 use std::cell::{Cell, RefCell};
 
-use syntax::abi::Abi;
 use syntax::ast;
 use syntax::codemap::{DUMMY_SP, Span};
 use syntax::parse::token::InternedString;
diff --git a/src/librustc_trans/trans/consts.rs b/src/librustc_trans/trans/consts.rs
index f2b68c477f69b8f834f20696ccf04f22c4b5fcbe..31ad7054996056b5a1a0cca3254d66da5596fb40 100644
--- a/src/librustc_trans/trans/consts.rs
+++ b/src/librustc_trans/trans/consts.rs
@@ -9,7 +9,6 @@
 // except according to those terms.
 
 
-use back::abi;
 use llvm;
 use llvm::{ConstFCmp, ConstICmp, SetLinkage, SetUnnamedAddr};
 use llvm::{InternalLinkage, ValueRef, Bool, True};
@@ -19,7 +18,7 @@
 use middle::def::Def;
 use middle::def_id::DefId;
 use rustc::front::map as hir_map;
-use trans::{adt, closure, debuginfo, expr, inline, machine};
+use trans::{abi, adt, closure, debuginfo, expr, inline, machine};
 use trans::base::{self, exported_name, push_ctxt};
 use trans::callee::Callee;
 use trans::collector::{self, TransItem};
diff --git a/src/librustc_trans/trans/debuginfo/mod.rs b/src/librustc_trans/trans/debuginfo/mod.rs
index 15275a46e9b7773e2e122bbf70d2f9a047666df9..e9a6aed70089fe1b628e898adb1dca4bff0bba8f 100644
--- a/src/librustc_trans/trans/debuginfo/mod.rs
+++ b/src/librustc_trans/trans/debuginfo/mod.rs
@@ -32,6 +32,7 @@
 use rustc_front;
 use rustc_front::hir;
 
+use trans::abi::Abi;
 use trans::common::{NodeIdAndSpan, CrateContext, FunctionContext, Block};
 use trans;
 use trans::{monomorphize, type_of};
@@ -49,7 +50,6 @@
 
 use syntax::codemap::{Span, Pos};
 use syntax::{ast, codemap};
-use syntax::abi::Abi;
 use syntax::attr::IntType;
 use syntax::parse::token::{self, special_idents};
 
diff --git a/src/librustc_trans/trans/debuginfo/type_names.rs b/src/librustc_trans/trans/debuginfo/type_names.rs
index cc9067677b25b3cc3370d390b20c3c2be85e8c04..b71b7789affe2f87575160b5f61aa1372f87bc3b 100644
--- a/src/librustc_trans/trans/debuginfo/type_names.rs
+++ b/src/librustc_trans/trans/debuginfo/type_names.rs
@@ -107,7 +107,7 @@ pub fn push_debuginfo_type_name<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>,
                 output.push_str("unsafe ");
             }
 
-            if abi != ::syntax::abi::Abi::Rust {
+            if abi != ::trans::abi::Abi::Rust {
                 output.push_str("extern \"");
                 output.push_str(abi.name());
                 output.push_str("\" ");
diff --git a/src/librustc_trans/trans/declare.rs b/src/librustc_trans/trans/declare.rs
index d77fd6f10a0b2a50cafc7bbd6a0bfe51dc9bb87f..848ed2c1211f435bfa3d0e0cf4495386b381c241 100644
--- a/src/librustc_trans/trans/declare.rs
+++ b/src/librustc_trans/trans/declare.rs
@@ -23,10 +23,9 @@
 use middle::ty;
 use middle::infer;
 use middle::traits::ProjectionMode;
-use syntax::abi::Abi;
+use trans::abi::{Abi, FnType};
 use trans::attributes;
 use trans::base;
-use trans::cabi::FnType;
 use trans::context::CrateContext;
 use trans::type_::Type;
 use trans::type_of;
diff --git a/src/librustc_trans/trans/expr.rs b/src/librustc_trans/trans/expr.rs
index 102732eb1dcca1752e3a81022e4dbfabec9e611a..6ea407e7b443edaba1579238a437be2029b6c75e 100644
--- a/src/librustc_trans/trans/expr.rs
+++ b/src/librustc_trans/trans/expr.rs
@@ -51,12 +51,11 @@
 pub use self::Dest::*;
 use self::lazy_binop_ty::*;
 
-use back::abi;
 use llvm::{self, ValueRef, TypeKind};
 use middle::const_qualif::ConstQualif;
 use middle::def::Def;
 use middle::subst::Substs;
-use trans::{_match, adt, asm, base, closure, consts, controlflow};
+use trans::{_match, abi, adt, asm, base, closure, consts, controlflow};
 use trans::base::*;
 use trans::build::*;
 use trans::callee::{Callee, ArgExprs, ArgOverloadedCall, ArgOverloadedOp};
diff --git a/src/librustc_trans/trans/foreign.rs b/src/librustc_trans/trans/foreign.rs
index 0c8ac32ecc11370ab74e9888b863289bdbc2ffd9..0cf30aca94cd27a797633432c67712181af91a43 100644
--- a/src/librustc_trans/trans/foreign.rs
+++ b/src/librustc_trans/trans/foreign.rs
@@ -9,15 +9,15 @@
 // except according to those terms.
 
 
-use back::{abi, link};
+use back::link;
 use llvm::{ValueRef, get_param};
 use llvm;
 use middle::weak_lang_items;
+use trans::abi::{self, Abi, FnType};
 use trans::attributes;
 use trans::base::{llvm_linkage_by_name, push_ctxt};
 use trans::base;
 use trans::build::*;
-use trans::cabi::FnType;
 use trans::common::*;
 use trans::debuginfo::DebugLoc;
 use trans::declare;
@@ -35,7 +35,6 @@
 use std::cmp;
 use std::iter::once;
 use libc::c_uint;
-use syntax::abi::Abi;
 use syntax::attr;
 use syntax::parse::token::{InternedString, special_idents};
 use syntax::ast;
@@ -715,7 +714,4 @@ pub fn link_name(name: ast::Name, attrs: &[ast::Attribute]) -> InternedString {
             None => name.as_str(),
         }
     }
-}
-        }
-    }
 }
diff --git a/src/librustc_trans/trans/intrinsic.rs b/src/librustc_trans/trans/intrinsic.rs
index 707d60e18a971ee1f7bc47b415895a0df131d95c..edca908e7ba04a3e5b1499235580a67f6435fcc6 100644
--- a/src/librustc_trans/trans/intrinsic.rs
+++ b/src/librustc_trans/trans/intrinsic.rs
@@ -18,6 +18,7 @@
 use middle::infer;
 use middle::subst;
 use middle::subst::FnSpace;
+use trans::abi::Abi;
 use trans::adt;
 use trans::attributes;
 use trans::base::*;
@@ -40,7 +41,6 @@
 use middle::subst::Substs;
 use rustc::dep_graph::DepNode;
 use rustc_front::hir;
-use syntax::abi::Abi;
 use syntax::ast;
 use syntax::ptr::P;
 use syntax::parse::token;
diff --git a/src/librustc_trans/trans/mir/block.rs b/src/librustc_trans/trans/mir/block.rs
index 1bbb2447e6a3ccec81e19194e58101485b60bfc5..00babf6792f9a4fd177950407b84b47e03b9f93f 100644
--- a/src/librustc_trans/trans/mir/block.rs
+++ b/src/librustc_trans/trans/mir/block.rs
@@ -11,7 +11,7 @@
 use llvm::{BasicBlockRef, ValueRef, OperandBundleDef};
 use rustc::middle::ty;
 use rustc::mir::repr as mir;
-use syntax::abi::Abi;
+use trans::abi::Abi;
 use trans::adt;
 use trans::attributes;
 use trans::base;
diff --git a/src/librustc_trans/trans/mir/constant.rs b/src/librustc_trans/trans/mir/constant.rs
index 52a4995f594c872e70924128caa05994989750a7..21cd35ea045ae2ea501a48e3351d33acc85f26bd 100644
--- a/src/librustc_trans/trans/mir/constant.rs
+++ b/src/librustc_trans/trans/mir/constant.rs
@@ -8,12 +8,12 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use back::abi;
 use llvm::ValueRef;
 use middle::ty::{Ty, TypeFoldable};
 use rustc::middle::const_eval::{self, ConstVal};
 use rustc_const_eval::ConstInt::*;
 use rustc::mir::repr as mir;
+use trans::abi;
 use trans::common::{self, BlockAndBuilder, C_bool, C_bytes, C_floating_f64, C_integral,
                     C_str_slice, C_nil, C_undef};
 use trans::consts;
diff --git a/src/librustc_trans/trans/mod.rs b/src/librustc_trans/trans/mod.rs
index 9d197742c1be37c0a2cf2c72d51b8f235620de2d..ff5ed35b8c08c1462b5d8c43f725f871a848650e 100644
--- a/src/librustc_trans/trans/mod.rs
+++ b/src/librustc_trans/trans/mod.rs
@@ -19,6 +19,7 @@
 #[macro_use]
 mod macros;
 
+mod abi;
 mod adt;
 mod asm;
 mod assert_dep_graph;
@@ -27,7 +28,6 @@
 mod basic_block;
 mod build;
 mod builder;
-mod cabi;
 mod cabi_aarch64;
 mod cabi_arm;
 mod cabi_asmjs;
diff --git a/src/librustc_trans/trans/monomorphize.rs b/src/librustc_trans/trans/monomorphize.rs
index fcbf0bdf790b489dc7901e49752f71adf741ac3e..07dba8e6cc383cbc1be3134b38c1c787b27073c1 100644
--- a/src/librustc_trans/trans/monomorphize.rs
+++ b/src/librustc_trans/trans/monomorphize.rs
@@ -16,6 +16,7 @@
 use middle::subst;
 use middle::subst::{Subst, Substs};
 use middle::ty::fold::{TypeFolder, TypeFoldable};
+use trans::abi::Abi;
 use trans::attributes;
 use trans::base::{push_ctxt};
 use trans::base::trans_fn;
@@ -30,7 +31,6 @@
 
 use rustc_front::hir;
 
-use syntax::abi::Abi;
 use syntax::attr;
 use syntax::errors;
 
diff --git a/src/librustc_trans/trans/type_of.rs b/src/librustc_trans/trans/type_of.rs
index ee2d84a7be7e0be68b4ec63ce6acf239e8b9f5d7..b3beecfb9b8d565c2d5ff1600aec323197e2f8ef 100644
--- a/src/librustc_trans/trans/type_of.rs
+++ b/src/librustc_trans/trans/type_of.rs
@@ -13,15 +13,14 @@
 use middle::def_id::DefId;
 use middle::infer;
 use middle::subst;
+use trans::abi::{Abi, FnType};
 use trans::adt;
-use trans::cabi::FnType;
 use trans::common::*;
 use trans::machine;
 use middle::ty::{self, Ty, TypeFoldable};
 
 use trans::type_::Type;
 
-use syntax::abi::Abi;
 use syntax::ast;
 
 // LLVM doesn't like objects that are too big. Issue #17913