From 44e4b2d63aef1e6cb572acfa327ea2c3a36083e8 Mon Sep 17 00:00:00 2001
From: Graydon Hoare <graydon@mozilla.com>
Date: Mon, 4 Oct 2010 15:55:12 -0700
Subject: Teach rustc about phi nodes, block relationships. Translate if- and
 block-expressions.

---
 src/comp/lib/llvm.rs | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'src/comp/lib')

diff --git a/src/comp/lib/llvm.rs b/src/comp/lib/llvm.rs
index f0cb65a2..220af154 100644
--- a/src/comp/lib/llvm.rs
+++ b/src/comp/lib/llvm.rs
@@ -1006,8 +1006,14 @@ obj builder(BuilderRef B) {
 
 
     /* Miscellaneous instructions */
-    fn Phi(TypeRef Ty) -> ValueRef {
-        ret llvm.LLVMBuildPhi(B, Ty, _str.buf(""));
+    fn Phi(TypeRef Ty, vec[ValueRef] vals, vec[BasicBlockRef] bbs) -> ValueRef {
+        auto phi = llvm.LLVMBuildPhi(B, Ty, _str.buf(""));
+        check (_vec.len[ValueRef](vals) == _vec.len[BasicBlockRef](bbs));
+        llvm.LLVMAddIncoming(phi,
+                             _vec.buf[ValueRef](vals),
+                             _vec.buf[BasicBlockRef](bbs),
+                             _vec.len[ValueRef](vals));
+        ret phi;
     }
 
     fn Call(ValueRef Fn, vec[ValueRef] Args) -> ValueRef {
-- 
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