[X86] Remove ReadAfterLd from BMI and TBM instructions that don't have a register...

The memory form of these instructions only read an input from memory. They don't have any register operands.

Differential Revision: https://reviews.llvm.org/D44836

llvm-svn: 328828

diff --git a/llvm/lib/Target/X86/X86InstrInfo.td b/llvm/lib/Target/X86/X86InstrInfo.td
index 1dd464c..b246c8c 100644 (file)
--- a/llvm/lib/Target/X86/X86InstrInfo.td
+++ b/llvm/lib/Target/X86/X86InstrInfo.td
@@ -2341,7 +2341,7 @@ let hasSideEffects = 0 in {
   let mayLoad = 1 in
   def rm : I<0xF3, MemMRM, (outs RC:$dst), (ins x86memop:$src),
              !strconcat(mnemonic, "\t{$src, $dst|$dst, $src}"),
-             [], IIC_UNARY_MEM>, T8PS, VEX_4V, Sched<[WriteALULd, ReadAfterLd]>;
+             [], IIC_UNARY_MEM>, T8PS, VEX_4V, Sched<[WriteALULd]>;
 }
 }
 
@@ -2540,7 +2540,7 @@ multiclass tbm_ternary_imm_intr<bits<8> opc, RegisterClass RC, string OpcodeStr,
                 !strconcat(OpcodeStr,
                            "\t{$cntl, $src1, $dst|$dst, $src1, $cntl}"),
                 [(set RC:$dst, (Int (ld_frag addr:$src1), immoperator:$cntl))],
-           IIC_BIN_MEM>, XOP, XOPA, Sched<[WriteALULd, ReadAfterLd]>;
+           IIC_BIN_MEM>, XOP, XOPA, Sched<[WriteALULd]>;
 }
 
 defm BEXTRI32 : tbm_ternary_imm_intr<0x10, GR32, "bextr{l}", i32mem, loadi32,
@@ -2560,7 +2560,7 @@ let hasSideEffects = 0 in {
   let mayLoad = 1 in
   def rm : I<opc,  FormMem, (outs RC:$dst), (ins x86memop:$src),
              !strconcat(OpcodeStr,"\t{$src, $dst|$dst, $src}"),
-             [], IIC_BIN_MEM>, XOP_4V, XOP9, Sched<[WriteALULd, ReadAfterLd]>;
+             [], IIC_BIN_MEM>, XOP_4V, XOP9, Sched<[WriteALULd]>;
 }
 }
 

diff --git a/llvm/lib/Target/X86/X86ScheduleZnver1.td b/llvm/lib/Target/X86/X86ScheduleZnver1.td
index 33472c8..74f32bc 100644 (file)
--- a/llvm/lib/Target/X86/X86ScheduleZnver1.td
+++ b/llvm/lib/Target/X86/X86ScheduleZnver1.td
@@ -566,7 +566,7 @@ def : InstRW<[ZnWriteBTRSCm], (instregex "BT(R|S|C)(16|32|64)m(r|i8)")>;
 // r,r.
 def : InstRW<[ZnWriteALULat2], (instregex "BLS(I|MSK|R)(32|64)rr")>;
 // r,m.
-def : InstRW<[ZnWriteALULat2Ld, ReadAfterLd], (instregex "BLS(I|MSK|R)(32|64)rm")>;
+def : InstRW<[ZnWriteALULat2Ld], (instregex "BLS(I|MSK|R)(32|64)rm")>;
 
 // CLD STD.
 def : InstRW<[WriteALU], (instregex "STD", "CLD")>;