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Some case eror for: detected memory leaks 

llvm-svn: 367083
This commit is contained in:
Kang Zhang 2019-07-26 03:25:58 +00:00
parent a9ea8a9aae
commit 4e794a8bae
3 changed files with 16 additions and 31 deletions
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25
llvm/lib/CodeGen/MachineBlockPlacement.cpp
View File

@ -2730,31 +2730,6 @@ void MachineBlockPlacement::optimizeBranches() {
TII->removeBranch(*ChainBB);
TII->insertBranch(*ChainBB, FBB, TBB, Cond, dl);
ChainBB->updateTerminator();
} else if (Cond.empty() && TBB && ChainBB != TBB &&
!TBB->canFallThrough()) {
// When ChainBB is unconditional branch to the TBB, and TBB has no
// fallthrough predecessor and fallthrough successor, try to merge
// ChainBB and TBB. This is legal under the one of following conditions:
// 1. ChainBB is empty except for an unconditional branch.
// 2. TBB has only one predecessor.
MachineFunction::iterator I(TBB);
if (((TBB == &*F->begin()) || !std::prev(I)->canFallThrough()) &&
(TailDup.isSimpleBB(ChainBB) || (TBB->pred_size() == 1))) {
TII->removeBranch(*ChainBB);
ChainBB->removeSuccessor(TBB);
// Update the CFG.
for (MachineBasicBlock::pred_iterator PI = TBB->pred_begin(),
PE = TBB->pred_end(); PI != PE; PI++)
(*PI)->ReplaceUsesOfBlockWith(TBB, ChainBB);
for (MachineBasicBlock *Succ : TBB->successors())
ChainBB->addSuccessor(Succ, MBPI->getEdgeProbability(TBB, Succ));
// Move all the instructions of TBB to ChainBB.
ChainBB->splice(ChainBB->end(), TBB, TBB->begin(), TBB->end());
F->remove(TBB);
}
}
}
}

10
llvm/test/CodeGen/PowerPC/block-placement-1.mir
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@ -299,8 +299,14 @@ body: |
bb.11.unreachable:
; CHECK: bb.1.for.body:
; CHECK-NEXT: successors: %bb.3(0x00000800)
; CHECK: successors: %bb.2(0x7ffff800), %bb.3(0x00000800)
; CHECK: B %bb.2
; CHECK: bb.4.catch4:
; CHECK-NEXT: %bb.6(0x00000800)
; CHECK: successors: %bb.11(0x7ffff800), %bb.6(0x00000800)
; CHECK: B %bb.11
; CHECK: bb.2..noexc:
; CHECK: bb.11.unreachable:
...

12
llvm/test/CodeGen/PowerPC/block-placement.mir
View File

@ -209,10 +209,14 @@ body: |
BLR8 implicit $lr8, implicit $rm, implicit killed $x3
; CHECK: bb.5.if.else.i:
; CHECK-NEXT: renamable $x3 = LI8 1
; CHECK-NEXT: BLR8 implicit $lr8, implicit $rm, implicit killed $x3
; CHECK: successors: %bb.11(0x80000000)
; CHECK: B %bb.11
; CHECK: bb.8.while.body.i (align 4):
; CHECK: successors: %bb.5(0x04000000), %bb.9(0x7c000000)
; CHECK: BCC 76, killed renamable $cr0, %bb.5
; CHECK: successors: %bb.11(0x04000000), %bb.9(0x7c000000)
; CHECK: BCC 76, killed renamable $cr0, %bb.11
; CHECK: bb.11:
; CHECK: renamable $x3 = LI8 1
; CHECK-NEXT: BLR8 implicit $lr8, implicit $rm, implicit killed $x3
...