diff options
Diffstat (limited to 'lib/Target/ARM/ARMConstantIslandPass.cpp')
| -rw-r--r-- | lib/Target/ARM/ARMConstantIslandPass.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMConstantIslandPass.cpp b/lib/Target/ARM/ARMConstantIslandPass.cpp index 26cf8622f3..f8936bc63f 100644 --- a/lib/Target/ARM/ARMConstantIslandPass.cpp +++ b/lib/Target/ARM/ARMConstantIslandPass.cpp @@ -1791,6 +1791,11 @@ bool ARMConstantIslands::OptimizeThumb2Branches() { if (Opcode != ARM::tBcc) continue; + // If the conditional branch doesn't kill CPSR, then CPSR can be liveout + // so this transformation is not safe. + if (!Br.MI->killsRegister(ARM::CPSR)) + continue; + NewOpc = 0; unsigned PredReg = 0; ARMCC::CondCodes Pred = llvm::getInstrPredicate(Br.MI, PredReg); |