diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/AMDGPU/AMDGPUInstructions.td | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td b/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td index 22a7a9c44a3..65d72fcb46f 100644 --- a/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td +++ b/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td @@ -126,6 +126,7 @@ def or_oneuse : HasOneUseBinOp<or>; def xor_oneuse : HasOneUseBinOp<xor>; } // Properties = [SDNPCommutative, SDNPAssociative] +def add_oneuse : HasOneUseBinOp<add>; def sub_oneuse : HasOneUseBinOp<sub>; def srl_oneuse : HasOneUseBinOp<srl>; @@ -682,6 +683,12 @@ multiclass BFEPattern <Instruction UBFE, Instruction SBFE, Instruction MOV> { (UBFE $src, $rshift, (MOV (i32 (IMMPopCount $mask)))) >; + // x & ((1 << y) - 1) + def : AMDGPUPat < + (and i32:$src, (add_oneuse (shl_oneuse 1, i32:$width), -1)), + (UBFE $src, (i32 0), $width) + >; + // x & (-1 >> (bitwidth - y)) def : AMDGPUPat < (and i32:$src, (srl_oneuse -1, (sub 32, i32:$width))), |
