From b9b7f4b8d3c804544d9764e00b365bfc8d9c793c Mon Sep 17 00:00:00 2001 From: Evandro Menezes Date: Tue, 21 Feb 2017 22:16:11 +0000 Subject: [AArch64, X86] Guard against both instrs being wild cards If both instrs are wild cards, the result can be a crash. llvm-svn: 295776 --- llvm/lib/Target/AArch64/AArch64MacroFusion.cpp | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'llvm/lib/Target/AArch64/AArch64MacroFusion.cpp') diff --git a/llvm/lib/Target/AArch64/AArch64MacroFusion.cpp b/llvm/lib/Target/AArch64/AArch64MacroFusion.cpp index a6965e8403b..cde2dab69b6 100644 --- a/llvm/lib/Target/AArch64/AArch64MacroFusion.cpp +++ b/llvm/lib/Target/AArch64/AArch64MacroFusion.cpp @@ -34,12 +34,13 @@ static bool shouldScheduleAdjacent(const AArch64InstrInfo &TII, const AArch64Subtarget &ST, const MachineInstr *First, const MachineInstr *Second) { + assert((First || Second) && "At least one instr must be specified"); unsigned FirstOpcode = - First ? First->getOpcode() - : static_cast(AArch64::INSTRUCTION_LIST_END); + First ? First->getOpcode() + : static_cast(AArch64::INSTRUCTION_LIST_END); unsigned SecondOpcode = - Second ? Second->getOpcode() - : static_cast(AArch64::INSTRUCTION_LIST_END); + Second ? Second->getOpcode() + : static_cast(AArch64::INSTRUCTION_LIST_END); if (ST.hasArithmeticBccFusion()) // Fuse CMN, CMP, TST followed by Bcc. -- cgit v1.2.3