diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86InstrSSE.td')
| -rw-r--r-- | llvm/lib/Target/X86/X86InstrSSE.td | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/llvm/lib/Target/X86/X86InstrSSE.td b/llvm/lib/Target/X86/X86InstrSSE.td index 804d0592322..d8bb435c29c 100644 --- a/llvm/lib/Target/X86/X86InstrSSE.td +++ b/llvm/lib/Target/X86/X86InstrSSE.td @@ -2001,6 +2001,7 @@ def PREFETCHNTA : PSI<0x18, MRM0m, (outs), (ins i8mem:$src), // Load, store, and memory fence def SFENCE : I<0xAE, MRM_F8, (outs), (ins), "sfence", [(int_x86_sse_sfence)]>, TB, Requires<[HasSSE1]>; +def : Pat<(X86SFence), (SFENCE)>; // Alias instructions that map zero vector to pxor / xorp* for sse. // We set canFoldAsLoad because this can be converted to a constant-pool @@ -3024,19 +3025,14 @@ def LFENCE : I<0xAE, MRM_E8, (outs), (ins), "lfence", [(int_x86_sse2_lfence)]>, TB, Requires<[HasSSE2]>; def MFENCE : I<0xAE, MRM_F0, (outs), (ins), "mfence", [(int_x86_sse2_mfence)]>, TB, Requires<[HasSSE2]>; +def : Pat<(X86LFence), (LFENCE)>; +def : Pat<(X86MFence), (MFENCE)>; + // Pause. This "instruction" is encoded as "rep; nop", so even though it // was introduced with SSE2, it's backward compatible. def PAUSE : I<0x90, RawFrm, (outs), (ins), "pause", []>, REP; -//TODO: custom lower this so as to never even generate the noop -def : Pat<(membarrier (i8 imm), (i8 imm), (i8 imm), (i8 imm), - (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), (i8 imm), (i8 imm), (i8 imm), - (i8 1)), (MFENCE)>; - // Alias instructions that map zero vector to pxor / xorp* for sse. // We set canFoldAsLoad because this can be converted to a constant-pool // load of an all-ones value if folding it would be beneficial. |
