---

yaml
---
r: 124409
b: refs/heads/snap-stage3
c: 459ffc2
h: refs/heads/master
i:
  124407: fe5ef89
v: v3

Author: bors

[refs]

@@ -1,7 +1,7 @@
 ---
 refs/heads/master: 32cb44bfff3facbded5fd9cc74af3f02e81565a8
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
-refs/heads/snap-stage3: aa760a849ee9f4d6817c81aad25fdc7990e894ed
+refs/heads/snap-stage3: 459ffc2adc74f5e8b64a76f5670edb419b9f65da
 refs/heads/try: dff46952ab5c4567d1b5b35bfbd8befc45cdd38e
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b

branches/snap-stage3/src/librustc/driver/config.rs

@@ -332,6 +332,8 @@ cgoptions!(
         "prefer dynamic linking to static linking"),
     no_integrated_as: bool = (false, parse_bool,
         "use an external assembler rather than LLVM's integrated one"),
+    no_redzone: bool = (false, parse_bool,
+        "disable the use of the redzone"),
     relocation_model: String = ("pic".to_string(), parse_string,
          "choose the relocation model to use (llc -relocation-model for details)"),
     metadata: Vec<String> = (Vec::new(), parse_list,

branches/snap-stage3/src/librustc/middle/trans/base.rs

@@ -193,6 +193,14 @@ fn decl_fn(ccx: &CrateContext, name: &str, cc: llvm::CallConv,
         _ => {}
     }
 
+    if ccx.tcx.sess.opts.cg.no_redzone {
+        unsafe {
+            llvm::LLVMAddFunctionAttribute(llfn,
+                                           llvm::FunctionIndex as c_uint,
+                                           llvm::NoRedZoneAttribute as uint64_t)
+        }
+    }
+
     llvm::SetFunctionCallConv(llfn, cc);
     // Function addresses in Rust are never significant, allowing functions to be merged.
     llvm::SetUnnamedAddr(llfn, true);