RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2025-04-04 08:41:49 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

AArch64ISelLowering: Reduce maximum recursion depth of isConjunctionDisjunctionTree()

Browse Source 
This function will exhibit exponential runtime (2**n) so we should
rather use a lower limit.

llvm-svn: 258604
This commit is contained in:
Matthias Braun 2016-01-23 04:05:18 +00:00
parent a0ca239a6c
commit da14179563
1 changed files with 2 additions and 2 deletions

4
lib/Target/AArch64/AArch64ISelLowering.cpp

@ -1326,8 +1326,8 @@ static bool isConjunctionDisjunctionTree(const SDValue Val, bool &CanPushNegate,
CanPushNegate = true; CanPushNegate = true;
return true; return true;
} }
// Protect against stack overflow. // Protect against exponential runtime and stack overflow.
if (Depth > 15) if (Depth > 6)
return false; return false;
if (Opcode == ISD::AND || Opcode == ISD::OR) { if (Opcode == ISD::AND || Opcode == ISD::OR) {
SDValue O0 = Val->getOperand(0); SDValue O0 = Val->getOperand(0);