[llvm] r217331 - Try to unflake AllocatorTest.TestAlignmentPastSlab

[Hans Wennborg]

Author: hans
Date: Sun Sep  7 00:14:29 2014
New Revision: 217331

URL: http://llvm.org/viewvc/llvm-project?rev=217331&view=rev
Log:
Try to unflake AllocatorTest.TestAlignmentPastSlab

Modified:
    llvm/trunk/unittests/Support/AllocatorTest.cpp

Modified: llvm/trunk/unittests/Support/AllocatorTest.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/unittests/Support/AllocatorTest.cpp?rev=217331&r1=217330&r2=217331&view=diff
==============================================================================
--- llvm/trunk/unittests/Support/AllocatorTest.cpp (original)
+++ llvm/trunk/unittests/Support/AllocatorTest.cpp Sun Sep  7 00:14:29 2014
@@ -118,10 +118,11 @@ TEST(AllocatorTest, TestSmallSlabSize) {
 // Test requesting alignment that goes past the end of the current slab.
 TEST(AllocatorTest, TestAlignmentPastSlab) {
   BumpPtrAllocator Alloc;
-  Alloc.Allocate(1234, 1);
+  Alloc.Allocate(4095, 1);
 
-  // Any attempt to align the pointer in the current slab would move it beyond
-  // the end of that slab.
+  // Aligning the current slab pointer is likely to move it past the end of the
+  // slab, which would confuse any unsigned comparisons with the difference of
+  // the the end pointer and the aligned pointer.
   Alloc.Allocate(1024, 8192);
 
   EXPECT_EQ(2U, Alloc.GetNumSlabs());