diff --git a/src/etc/vim/syntax/rust.vim b/src/etc/vim/syntax/rust.vim
index f811fbf5855..ccd1ddc2430 100644
--- a/src/etc/vim/syntax/rust.vim
+++ b/src/etc/vim/syntax/rust.vim
@@ -11,7 +11,7 @@ elseif exists("b:current_syntax")
 endif
 
 syn match     rustAssert      "\<assert\(\w\)*"
-syn keyword   rustKeyword     as break
+syn keyword   rustKeyword     __asm__ as break
 syn keyword   rustKeyword     copy do drop else extern
 syn keyword   rustKeyword     for if impl let log
 syn keyword   rustKeyword     loop match mod once priv pub pure
diff --git a/src/librustc/lib/llvm.rs b/src/librustc/lib/llvm.rs
index 4cb018ebdd1..629ed75cfda 100644
--- a/src/librustc/lib/llvm.rs
+++ b/src/librustc/lib/llvm.rs
@@ -1433,6 +1433,11 @@ pub mod llvm {
 
         /** Enables LLVM debug output. */
         pub unsafe fn LLVMSetDebug(Enabled: c_int);
+
+        /** Prepares inline assembly. */
+        pub unsafe fn LLVMInlineAsm(Ty: TypeRef, AsmString: *c_char,
+                                    Constraints: *c_char, SideEffects: Bool,
+                                    AlignStack: Bool) -> ValueRef;
     }
 }
 
diff --git a/src/librustc/middle/liveness.rs b/src/librustc/middle/liveness.rs
index 0c17b371694..d300698da59 100644
--- a/src/librustc/middle/liveness.rs
+++ b/src/librustc/middle/liveness.rs
@@ -620,7 +620,8 @@ fn visit_expr(expr: @expr, &&self: @mut IrMaps, vt: vt<@mut IrMaps>) {
       expr_do_body(*) | expr_cast(*) | expr_unary(*) | expr_break(_) |
       expr_again(_) | expr_lit(_) | expr_ret(*) | expr_block(*) |
       expr_assign(*) | expr_swap(*) | expr_assign_op(*) | expr_mac(*) |
-      expr_struct(*) | expr_repeat(*) | expr_paren(*) => {
+      expr_struct(*) | expr_repeat(*) | expr_paren(*) |
+      expr_inline_asm(*) => {
           visit::visit_expr(expr, self, vt);
       }
     }
@@ -1345,6 +1346,7 @@ pub impl Liveness {
             self.propagate_through_expr(e, succ)
           }
 
+          expr_inline_asm(*) |
           expr_lit(*) => {
             succ
           }
@@ -1618,7 +1620,7 @@ fn check_expr(expr: @expr, &&self: @Liveness, vt: vt<@Liveness>) {
       expr_cast(*) | expr_unary(*) | expr_ret(*) | expr_break(*) |
       expr_again(*) | expr_lit(_) | expr_block(*) | expr_swap(*) |
       expr_mac(*) | expr_addr_of(*) | expr_struct(*) | expr_repeat(*) |
-      expr_paren(*) => {
+      expr_paren(*) | expr_inline_asm(*) => {
         visit::visit_expr(expr, self, vt);
       }
     }
diff --git a/src/librustc/middle/mem_categorization.rs b/src/librustc/middle/mem_categorization.rs
index 9e0ecb5a218..5881f95f298 100644
--- a/src/librustc/middle/mem_categorization.rs
+++ b/src/librustc/middle/mem_categorization.rs
@@ -447,7 +447,7 @@ pub impl mem_categorization_ctxt {
           ast::expr_while(*) | ast::expr_block(*) | ast::expr_loop(*) |
           ast::expr_match(*) | ast::expr_lit(*) | ast::expr_break(*) |
           ast::expr_mac(*) | ast::expr_again(*) | ast::expr_struct(*) |
-          ast::expr_repeat(*) => {
+          ast::expr_repeat(*) | ast::expr_inline_asm(*) => {
             return self.cat_rvalue(expr, expr_ty);
           }
         }
diff --git a/src/librustc/middle/moves.rs b/src/librustc/middle/moves.rs
index 182697b290f..734f4651f3b 100644
--- a/src/librustc/middle/moves.rs
+++ b/src/librustc/middle/moves.rs
@@ -560,7 +560,8 @@ pub impl VisitContext {
 
             expr_break(*) |
             expr_again(*) |
-            expr_lit(*) => {}
+            expr_lit(*)   |
+            expr_inline_asm(*) => {}
 
             expr_loop(ref blk, _) => {
                 self.consume_block(blk, visitor);
diff --git a/src/librustc/middle/trans/build.rs b/src/librustc/middle/trans/build.rs
index 45104480b4c..93459042d23 100644
--- a/src/librustc/middle/trans/build.rs
+++ b/src/librustc/middle/trans/build.rs
@@ -18,7 +18,7 @@ use syntax::codemap::span;
 
 use core::prelude::*;
 use core::cast;
-use core::libc::{c_uint, c_int, c_ulonglong};
+use core::libc::{c_uint, c_int, c_ulonglong, c_char};
 use core::libc;
 use core::option::Some;
 use core::ptr;
@@ -872,6 +872,17 @@ pub fn add_comment(bcx: block, text: &str) {
     }
 }
 
+pub fn InlineAsmCall(cx: block, asm: *c_char, cons: *c_char) -> ValueRef {
+    unsafe {
+        count_insn(cx, "inlineasm");
+
+        let llfty = T_fn(~[], T_void());
+        let v = llvm::LLVMInlineAsm(llfty, asm, cons, False, False);
+
+        Call(cx, v, ~[])
+    }
+}
+
 pub fn Call(cx: block, Fn: ValueRef, Args: &[ValueRef]) -> ValueRef {
     if cx.unreachable { return _UndefReturn(cx, Fn); }
     unsafe {
diff --git a/src/librustc/middle/trans/expr.rs b/src/librustc/middle/trans/expr.rs
index e38b0be7bcc..9012d258718 100644
--- a/src/librustc/middle/trans/expr.rs
+++ b/src/librustc/middle/trans/expr.rs
@@ -691,6 +691,14 @@ fn trans_rvalue_dps_unadjusted(bcx: block, expr: @ast::expr,
         ast::expr_assign_op(op, dst, src) => {
             return trans_assign_op(bcx, expr, op, dst, src);
         }
+        ast::expr_inline_asm(asm, cons) => {
+            do str::as_c_str(*asm) |a| {
+                do str::as_c_str(*cons) |c| {
+                    InlineAsmCall(bcx, a, c);
+                }
+            }
+            return bcx;
+        }
         _ => {
             bcx.tcx().sess.span_bug(
                 expr.span,
diff --git a/src/librustc/middle/trans/type_use.rs b/src/librustc/middle/trans/type_use.rs
index 710bb5eb346..9a0c330d2d1 100644
--- a/src/librustc/middle/trans/type_use.rs
+++ b/src/librustc/middle/trans/type_use.rs
@@ -353,7 +353,7 @@ pub fn mark_for_expr(cx: Context, e: @expr) {
       expr_match(*) | expr_block(_) | expr_if(*) | expr_while(*) |
       expr_break(_) | expr_again(_) | expr_unary(_, _) | expr_lit(_) |
       expr_mac(_) | expr_addr_of(_, _) | expr_ret(_) | expr_loop(_, _) |
-      expr_loop_body(_) | expr_do_body(_) => ()
+      expr_loop_body(_) | expr_do_body(_) | expr_inline_asm(*) => ()
     }
 }
 
diff --git a/src/librustc/middle/ty.rs b/src/librustc/middle/ty.rs
index b4ef87491a8..6e21439fc35 100644
--- a/src/librustc/middle/ty.rs
+++ b/src/librustc/middle/ty.rs
@@ -3076,6 +3076,7 @@ pub fn expr_kind(tcx: ctxt,
         ast::expr_block(*) |
         ast::expr_copy(*) |
         ast::expr_repeat(*) |
+        ast::expr_inline_asm(*) |
         ast::expr_lit(@codemap::spanned {node: lit_str(_), _}) |
         ast::expr_vstore(_, ast::expr_vstore_slice) |
         ast::expr_vstore(_, ast::expr_vstore_mut_slice) |
diff --git a/src/librustc/middle/typeck/check/mod.rs b/src/librustc/middle/typeck/check/mod.rs
index 6617fa3b27c..bd36eb1cf56 100644
--- a/src/librustc/middle/typeck/check/mod.rs
+++ b/src/librustc/middle/typeck/check/mod.rs
@@ -2303,6 +2303,7 @@ pub fn check_expr_with_unifier(fcx: @mut FnCtxt,
         let region_lb = ty::re_scope(expr.id);
         instantiate_path(fcx, pth, tpt, expr.span, expr.id, region_lb);
       }
+      ast::expr_inline_asm(*) => { fcx.write_nil(id); }
       ast::expr_mac(_) => tcx.sess.bug(~"unexpanded macro"),
       ast::expr_break(_) => { fcx.write_bot(id); bot = true; }
       ast::expr_again(_) => { fcx.write_bot(id); bot = true; }
diff --git a/src/librustc/middle/typeck/check/regionck.rs b/src/librustc/middle/typeck/check/regionck.rs
index 55d027549e3..1dd88e6408b 100644
--- a/src/librustc/middle/typeck/check/regionck.rs
+++ b/src/librustc/middle/typeck/check/regionck.rs
@@ -682,6 +682,7 @@ pub mod guarantor {
 
             // All of these expressions are rvalues and hence their
             // value is not guaranteed by a region pointer.
+            ast::expr_inline_asm(*) |
             ast::expr_mac(*) |
             ast::expr_lit(_) |
             ast::expr_unary(*) |
diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index 27dba9c2b5e..b7c30360613 100644
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -600,6 +600,8 @@ pub enum expr_ {
     expr_again(Option<ident>),
     expr_ret(Option<@expr>),
     expr_log(log_level, @expr, @expr),
+    
+    expr_inline_asm(@~str /* asm */, @~str /* constraints */),
 
     expr_mac(mac),
 
diff --git a/src/libsyntax/fold.rs b/src/libsyntax/fold.rs
index 427760c920f..15097f57b02 100644
--- a/src/libsyntax/fold.rs
+++ b/src/libsyntax/fold.rs
@@ -560,6 +560,7 @@ pub fn noop_fold_expr(e: &expr_, fld: @ast_fold) -> expr_ {
                 fld.fold_expr(e)
             )
         }
+        expr_inline_asm(*) => copy *e,
         expr_mac(ref mac) => expr_mac(fold_mac((*mac))),
         expr_struct(path, ref fields, maybe_expr) => {
             expr_struct(
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index 99c1c2cb1fe..6076ad0ce0e 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -27,7 +27,7 @@ use ast::{expr_field, expr_fn_block, expr_if, expr_index};
 use ast::{expr_lit, expr_log, expr_loop, expr_loop_body, expr_mac};
 use ast::{expr_method_call, expr_paren, expr_path, expr_repeat};
 use ast::{expr_ret, expr_swap, expr_struct, expr_tup, expr_unary};
-use ast::{expr_vec, expr_vstore, expr_vstore_mut_box};
+use ast::{expr_vec, expr_vstore, expr_vstore_mut_box, expr_inline_asm};
 use ast::{expr_vstore_fixed, expr_vstore_slice, expr_vstore_box};
 use ast::{expr_vstore_mut_slice, expr_while, extern_fn, field, fn_decl};
 use ast::{expr_vstore_uniq, TyClosure, TyBareFn, Onceness, Once, Many};
@@ -1184,6 +1184,14 @@ pub impl Parser {
                 }
             }
             hi = self.span.hi;
+        } else if self.eat_keyword(&~"__asm__") {
+            self.expect(&token::LPAREN);
+            let asm = self.parse_str();
+            self.expect(&token::COMMA);
+            let cons = self.parse_str();
+            ex = expr_inline_asm(asm, cons);
+            hi = self.span.hi;
+            self.expect(&token::RPAREN);
         } else if self.eat_keyword(&~"log") {
             self.expect(&token::LPAREN);
             let lvl = self.parse_expr();
diff --git a/src/libsyntax/parse/token.rs b/src/libsyntax/parse/token.rs
index 81aacbf173d..5cfe0bef9b8 100644
--- a/src/libsyntax/parse/token.rs
+++ b/src/libsyntax/parse/token.rs
@@ -488,6 +488,7 @@ pub fn temporary_keyword_table() -> HashMap<~str, ()> {
 pub fn strict_keyword_table() -> HashMap<~str, ()> {
     let words = HashMap();
     let keys = ~[
+        ~"__asm__",
         ~"as", ~"assert",
         ~"break",
         ~"const", ~"copy",
diff --git a/src/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs
index 62f593f15c1..350ab0cf9b2 100644
--- a/src/libsyntax/print/pprust.rs
+++ b/src/libsyntax/print/pprust.rs
@@ -1398,6 +1398,14 @@ pub fn print_expr(s: @ps, &&expr: @ast::expr) {
           }
         }
       }
+      ast::expr_inline_asm(a, c) => {
+        word(s.s, ~"__asm__");
+        popen(s);
+        print_string(s, *a);
+        word_space(s, ~", ");
+        print_string(s, *c);
+        pclose(s);
+      }
       ast::expr_mac(ref m) => print_mac(s, (*m)),
       ast::expr_paren(e) => {
           popen(s);
diff --git a/src/libsyntax/visit.rs b/src/libsyntax/visit.rs
index f04894729bd..95ab603f584 100644
--- a/src/libsyntax/visit.rs
+++ b/src/libsyntax/visit.rs
@@ -562,6 +562,7 @@ pub fn visit_expr<E>(ex: @expr, e: E, v: vt<E>) {
         }
         expr_mac(ref mac) => visit_mac((*mac), e, v),
         expr_paren(x) => (v.visit_expr)(x, e, v),
+        expr_inline_asm(*) => (),
     }
     (v.visit_expr_post)(ex, e, v);
 }
diff --git a/src/rustllvm/RustWrapper.cpp b/src/rustllvm/RustWrapper.cpp
index 3af936d3461..f5efed5f3a0 100644
--- a/src/rustllvm/RustWrapper.cpp
+++ b/src/rustllvm/RustWrapper.cpp
@@ -15,6 +15,7 @@
 //
 //===----------------------------------------------------------------------===
 
+#include "llvm/InlineAsm.h"
 #include "llvm/LLVMContext.h"
 #include "llvm/Linker.h"
 #include "llvm/PassManager.h"
@@ -539,3 +540,14 @@ extern "C" void LLVMSetDebug(int Enabled) {
   DebugFlag = Enabled;
 #endif
 }
+
+extern "C" LLVMValueRef LLVMInlineAsm(LLVMTypeRef Ty,
+                                      char *AsmString,
+                                      char *Constraints,
+                                      LLVMBool HasSideEffects,
+                                      LLVMBool IsAlignStack) {
+    return wrap(InlineAsm::get(unwrap<FunctionType>(Ty), AsmString,
+                               Constraints, HasSideEffects,
+                               IsAlignStack));
+//                               IsAlignStack, InlineAsm::AD_Intel));
+}
diff --git a/src/rustllvm/rustllvm.def.in b/src/rustllvm/rustllvm.def.in
index ceedf438296..8b1c9d5ec7f 100644
--- a/src/rustllvm/rustllvm.def.in
+++ b/src/rustllvm/rustllvm.def.in
@@ -583,3 +583,4 @@ LLVMX86MMXTypeInContext
 LLVMConstNamedStruct
 LLVMStructCreateNamed
 LLVMStructSetBody
+LLVMInlineAsm