diff options
Diffstat (limited to 'lib/Target/ARM/ARMInstrInfo.td')
| -rw-r--r-- | lib/Target/ARM/ARMInstrInfo.td | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td index 1c2976d354..6f510ba665 100644 --- a/lib/Target/ARM/ARMInstrInfo.td +++ b/lib/Target/ARM/ARMInstrInfo.td @@ -1951,6 +1951,13 @@ let isCall = 1, def BMOVPCRX_CALL : ARMPseudoInst<(outs), (ins tGPR:$func, variable_ops), 8, IIC_Br, [(ARMcall_nolink tGPR:$func)]>, Requires<[IsARM, NoV4T, IsNotIOS]>; + + // mov lr, pc; b if callee is marked noreturn to avoid confusing the + // return stack predictor. + def BMOVPCB_CALL : ARMPseudoInst<(outs), + (ins bl_target:$func, variable_ops), + 8, IIC_Br, [(ARMcall_nolink tglobaladdr:$func)]>, + Requires<[IsARM, IsNotIOS]>; } let isCall = 1, @@ -1993,6 +2000,12 @@ let isCall = 1, def BMOVPCRXr9_CALL : ARMPseudoInst<(outs), (ins tGPR:$func, variable_ops), 8, IIC_Br, [(ARMcall_nolink tGPR:$func)]>, Requires<[IsARM, NoV4T, IsIOS]>; + + // mov lr, pc; b if callee is marked noreturn to avoid confusing the + // return stack predictor. + def BMOVPCBr9_CALL : ARMPseudoInst<(outs),(ins bl_target:$func, variable_ops), + 8, IIC_Br, [(ARMcall_nolink tglobaladdr:$func)]>, + Requires<[IsARM, IsIOS]>; } let isBranch = 1, isTerminator = 1 in { @@ -4897,6 +4910,12 @@ def : ARMPat<(ARMcall texternalsym:$func), (BL texternalsym:$func)>, Requires<[IsARM, IsNotIOS]>; def : ARMPat<(ARMcall texternalsym:$func), (BLr9 texternalsym:$func)>, Requires<[IsARM, IsIOS]>; +def : ARMPat<(ARMcall_nolink texternalsym:$func), + (BMOVPCB_CALL texternalsym:$func)>, + Requires<[IsARM, IsNotIOS]>; +def : ARMPat<(ARMcall_nolink texternalsym:$func), + (BMOVPCBr9_CALL texternalsym:$func)>, + Requires<[IsARM, IsIOS]>; // zextload i1 -> zextload i8 def : ARMPat<(zextloadi1 addrmode_imm12:$addr), (LDRBi12 addrmode_imm12:$addr)>; |