---

yaml
---
r: 233643
b: refs/heads/beta
c: 64fcf3b
h: refs/heads/master
i:
  233641: 294ef34
  233639: 61bac9c
v: v3

Author: dotdash

[refs]

@@ -23,7 +23,7 @@ refs/tags/0.9: 36870b185fc5f5486636d4515f0e22677493f225
 refs/tags/0.10: ac33f2b15782272ae348dbd7b14b8257b2148b5a
 refs/tags/0.11.0: e1247cb1d0d681be034adb4b558b5a0c0d5720f9
 refs/tags/0.12.0: f0c419429ef30723ceaf6b42f9b5a2aeb5d2e2d1
-refs/heads/beta: c69c29bb530968e35069c53a573c80299ccc8ac8
+refs/heads/beta: 64fcf3b1a6a75e6cc1438589dbd8594c5c799b74
 refs/tags/1.0.0-alpha: e42bd6d93a1d3433c486200587f8f9e12590a4d7
 refs/heads/tmp: 370fe2786109360f7c35b8ba552b83b773dd71d6
 refs/tags/1.0.0-alpha.2: 4c705f6bc559886632d3871b04f58aab093bfa2f

branches/beta/src/librustc_data_structures/transitive_relation.rs

@@ -110,7 +110,7 @@ impl<T:Debug+PartialEq> TransitiveRelation<T> {
     /// (there are corresponding tests below, btw). In each case,
     /// the query is `postdom_upper_bound(a, b)`:
     ///
-    /// ```text
+    /// ```
     /// // returns Some(x), which is also LUB
     /// a -> a1 -> x
     ///            ^

branches/beta/src/librustc_trans/trans/base.rs

@@ -917,10 +917,14 @@ pub fn call_lifetime_start(cx: Block, ptr: ValueRef) {
     let _icx = push_ctxt("lifetime_start");
     let ccx = cx.ccx();
 
-    let llsize = C_u64(ccx, machine::llsize_of_alloc(ccx, val_ty(ptr).element_type()));
+    let size = machine::llsize_of_alloc(ccx, val_ty(ptr).element_type());
+    if size == 0 {
+        return;
+    }
+
     let ptr = PointerCast(cx, ptr, Type::i8p(ccx));
     let lifetime_start = ccx.get_intrinsic(&"llvm.lifetime.start");
-    Call(cx, lifetime_start, &[llsize, ptr], None, DebugLoc::None);
+    Call(cx, lifetime_start, &[C_u64(ccx, size), ptr], None, DebugLoc::None);
 }
 
 pub fn call_lifetime_end(cx: Block, ptr: ValueRef) {
@@ -931,10 +935,14 @@ pub fn call_lifetime_end(cx: Block, ptr: ValueRef) {
     let _icx = push_ctxt("lifetime_end");
     let ccx = cx.ccx();
 
-    let llsize = C_u64(ccx, machine::llsize_of_alloc(ccx, val_ty(ptr).element_type()));
+    let size = machine::llsize_of_alloc(ccx, val_ty(ptr).element_type());
+    if size == 0 {
+        return;
+    }
+
     let ptr = PointerCast(cx, ptr, Type::i8p(ccx));
     let lifetime_end = ccx.get_intrinsic(&"llvm.lifetime.end");
-    Call(cx, lifetime_end, &[llsize, ptr], None, DebugLoc::None);
+    Call(cx, lifetime_end, &[C_u64(ccx, size), ptr], None, DebugLoc::None);
 }
 
 pub fn call_memcpy(cx: Block, dst: ValueRef, src: ValueRef, n_bytes: ValueRef, align: u32) {
@@ -956,11 +964,6 @@ pub fn memcpy_ty<'blk, 'tcx>(bcx: Block<'blk, 'tcx>,
                              t: Ty<'tcx>) {
     let _icx = push_ctxt("memcpy_ty");
     let ccx = bcx.ccx();
-
-    if type_is_zero_size(ccx, t) {
-        return;
-    }
-
     if t.is_structural() {
         let llty = type_of::type_of(ccx, t);
         let llsz = llsize_of(ccx, llty);

branches/beta/src/libstd/num/f64.rs

@@ -454,11 +454,7 @@ impl f64 {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline]
     pub fn sqrt(self) -> f64 {
-        if self < 0.0 {
-            NAN
-        } else {
-            unsafe { intrinsics::sqrtf64(self) }
-        }
+        unsafe { intrinsics::sqrtf64(self) }
     }
 
     /// Returns `e^(self)`, (the exponential function).