diff options
Diffstat (limited to 'llvm/lib/Target/ARM/ARMInstrThumb.td')
| -rw-r--r-- | llvm/lib/Target/ARM/ARMInstrThumb.td | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/llvm/lib/Target/ARM/ARMInstrThumb.td b/llvm/lib/Target/ARM/ARMInstrThumb.td index 197afeb11fd..a151c0dfaaf 100644 --- a/llvm/lib/Target/ARM/ARMInstrThumb.td +++ b/llvm/lib/Target/ARM/ARMInstrThumb.td @@ -237,7 +237,8 @@ class T1SystemEncoding<bits<8> opc> } def tNOP : T1pI<(outs), (ins), NoItinerary, "nop", "", []>, - T1SystemEncoding<0x00>; // A8.6.110 + T1SystemEncoding<0x00>, // A8.6.110 + Requires<[IsThumb2]>; def tYIELD : T1pI<(outs), (ins), NoItinerary, "yield", "", []>, T1SystemEncoding<0x10>; // A8.6.410 @@ -1382,3 +1383,8 @@ let isBranch = 1, isTerminator = 1, isBarrier = 1, isIndirectBranch = 1 in { 2, IIC_Br, [(brind GPR:$Rm)], (tMOVr PC, GPR:$Rm, pred:$p)>; } + + +// In Thumb1, "nop" is encoded as a "mov r8, r8". Technically, the bf00 +// encoding is available on ARMv6K, but we don't differentiate that finely. +def : InstAlias<"nop", (tMOVr R8, R8, 14, 0)>,Requires<[IsThumb, IsThumb1Only]>; |
