From a7af86155d9b82cd65758c1fd6954aaef053b11a Mon Sep 17 00:00:00 2001
From: Graydon Hoare <graydon@mozilla.com>
Date: Sun, 14 Nov 2010 11:21:49 -0800
Subject: Support emitting trap instructions for debugging.

---
 src/comp/lib/llvm.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'src/comp/lib')

diff --git a/src/comp/lib/llvm.rs b/src/comp/lib/llvm.rs
index d30bb3ba..0cd177a4 100644
--- a/src/comp/lib/llvm.rs
+++ b/src/comp/lib/llvm.rs
@@ -1069,6 +1069,19 @@ obj builder(BuilderRef B) {
         ret llvm.LLVMBuildPtrDiff(B, LHS, RHS, _str.buf(""));
     }
 
+    fn Trap() -> ValueRef {
+        let BasicBlockRef BB = llvm.LLVMGetInsertBlock(B);
+        let ValueRef FN = llvm.LLVMGetBasicBlockParent(BB);
+        let ModuleRef M = llvm.LLVMGetGlobalParent(FN);
+        let ValueRef T = llvm.LLVMGetNamedFunction(M, _str.buf("llvm.trap"));
+        check (T as int != 0);
+        let vec[ValueRef] Args = vec();
+        ret llvm.LLVMBuildCall(B, T,
+                               _vec.buf[ValueRef](Args),
+                               _vec.len[ValueRef](Args),
+                               _str.buf(""));
+    }
+
     drop {
         llvm.LLVMDisposeBuilder(B);
     }
-- 
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