diff options
Diffstat (limited to 'lib/Target/X86/X86InstrSSE.td')
| -rw-r--r-- | lib/Target/X86/X86InstrSSE.td | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/Target/X86/X86InstrSSE.td b/lib/Target/X86/X86InstrSSE.td index 183ee2c..3d225ee 100644 --- a/lib/Target/X86/X86InstrSSE.td +++ b/lib/Target/X86/X86InstrSSE.td @@ -2149,6 +2149,14 @@ def LFENCE : I<0xAE, MRM5m, (outs), (ins), def MFENCE : I<0xAE, MRM6m, (outs), (ins), "mfence", [(int_x86_sse2_mfence)]>, TB, Requires<[HasSSE2]>; +//TODO: custom lower this so as to never even generate the noop +def : Pat<(membarrier (i8 imm:$ll), (i8 imm:$ls), (i8 imm:$sl), (i8 imm:$ss), + (i8 0)), (NOOP)>; +def : Pat<(membarrier (i8 0), (i8 0), (i8 0), (i8 1), (i8 1)), (SFENCE)>; +def : Pat<(membarrier (i8 1), (i8 0), (i8 0), (i8 0), (i8 1)), (LFENCE)>; +def : Pat<(membarrier (i8 imm:$ll), (i8 imm:$ls), (i8 imm:$sl), (i8 imm:$ss), + (i8 1)), (MFENCE)>; + // Alias instructions that map zero vector to pxor / xorp* for sse. let isReMaterializable = 1 in def V_SETALLONES : PDI<0x76, MRMInitReg, (outs VR128:$dst), (ins), |