diff options
| author | Kyle Butt <kyle+llvm@iteratee.net> | 2017-01-31 23:48:32 +0000 |
|---|---|---|
| committer | Kyle Butt <kyle+llvm@iteratee.net> | 2017-01-31 23:48:32 +0000 |
| commit | 5818a513ae843dbe69aab76705837c19cba4f359 (patch) | |
| tree | 969872c5577128e11c4001311913fbcb4b8e447a /test/CodeGen/ARM/cmpxchg-weak.ll | |
| parent | 8f159c8d927e8235ee88cf1c236522f449dc57cb (diff) | |
CodeGen: Allow small copyable blocks to "break" the CFG.
When choosing the best successor for a block, ordinarily we would have preferred
a block that preserves the CFG unless there is a strong probability the other
direction. For small blocks that can be duplicated we now skip that requirement
as well, subject to some simple frequency calculations.
Differential Revision: https://reviews.llvm.org/D28583
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@293716 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/ARM/cmpxchg-weak.ll')
| -rw-r--r-- | test/CodeGen/ARM/cmpxchg-weak.ll | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/test/CodeGen/ARM/cmpxchg-weak.ll b/test/CodeGen/ARM/cmpxchg-weak.ll index 4038528c91b..0d5681aafbc 100644 --- a/test/CodeGen/ARM/cmpxchg-weak.ll +++ b/test/CodeGen/ARM/cmpxchg-weak.ll @@ -13,14 +13,16 @@ define void @test_cmpxchg_weak(i32 *%addr, i32 %desired, i32 %new) { ; CHECK-NEXT: dmb ish ; CHECK-NEXT: strex [[SUCCESS:r[0-9]+]], r2, [r0] ; CHECK-NEXT: cmp [[SUCCESS]], #0 -; CHECK-NEXT: bne [[FAILBB:LBB[0-9]+_[0-9]+]] +; CHECK-NEXT: beq [[SUCCESSBB:LBB[0-9]+_[0-9]+]] ; CHECK-NEXT: BB#2: -; CHECK-NEXT: dmb ish ; CHECK-NEXT: str r3, [r0] ; CHECK-NEXT: bx lr ; CHECK-NEXT: [[LDFAILBB]]: ; CHECK-NEXT: clrex -; CHECK-NEXT: [[FAILBB]]: +; CHECK-NEXT: str r3, [r0] +; CHECK-NEXT: bx lr +; CHECK-NEXT: [[SUCCESSBB]]: +; CHECK-NEXT: dmb ish ; CHECK-NEXT: str r3, [r0] ; CHECK-NEXT: bx lr |