AMDGPU: Delete dead code
There is no context where s_mov_b64 is emitted
and could potentially be moved to the VALU.
It is currently only emitted for materializing
immediates, which can't be dependent on vector sources.
The immediate splitting is already done when selecting
constants. I'm not sure what contexts if any the register
splitting would have been used before.
Also clean up using s_mov_b64 in place of v_mov_b64_pseudo,
although this isn't required and just skips the extra step
of eliminating the copy from the SReg_64.
llvm-svn: 246080
diff --git a/llvm/lib/Target/AMDGPU/SIInstructions.td b/llvm/lib/Target/AMDGPU/SIInstructions.td
index 5c505808..0ba039d 100644
--- a/llvm/lib/Target/AMDGPU/SIInstructions.td
+++ b/llvm/lib/Target/AMDGPU/SIInstructions.td
@@ -2817,10 +2817,6 @@
// -1. For the non-rtn variants, the manual says it does
// DS[A] = (DS[A] >= D0) ? 0 : DS[A] + 1, and setting D0 to uint_max
// will always do the increment so I'm assuming it's the same.
-//
-// We also load this -1 with s_mov_b32 / s_mov_b64 even though this
-// needs to be a VGPR. The SGPR copy pass will fix this, and it's
-// easier since there is no v_mov_b64.
class DSAtomicIncRetPat<DS inst, ValueType vt,
Instruction LoadImm, PatFrag frag> : Pat <
(frag (DS1Addr1Offset i32:$ptr, i32:$offset), (vt 1)),
@@ -2836,9 +2832,9 @@
// 32-bit atomics.
def : DSAtomicIncRetPat<DS_INC_RTN_U32, i32,
- S_MOV_B32, si_atomic_load_add_local>;
+ V_MOV_B32_e32, si_atomic_load_add_local>;
def : DSAtomicIncRetPat<DS_DEC_RTN_U32, i32,
- S_MOV_B32, si_atomic_load_sub_local>;
+ V_MOV_B32_e32, si_atomic_load_sub_local>;
def : DSAtomicRetPat<DS_WRXCHG_RTN_B32, i32, si_atomic_swap_local>;
def : DSAtomicRetPat<DS_ADD_RTN_U32, i32, si_atomic_load_add_local>;
@@ -2855,9 +2851,9 @@
// 64-bit atomics.
def : DSAtomicIncRetPat<DS_INC_RTN_U64, i64,
- S_MOV_B64, si_atomic_load_add_local>;
+ V_MOV_B64_PSEUDO, si_atomic_load_add_local>;
def : DSAtomicIncRetPat<DS_DEC_RTN_U64, i64,
- S_MOV_B64, si_atomic_load_sub_local>;
+ V_MOV_B64_PSEUDO, si_atomic_load_sub_local>;
def : DSAtomicRetPat<DS_WRXCHG_RTN_B64, i64, si_atomic_swap_local>;
def : DSAtomicRetPat<DS_ADD_RTN_U64, i64, si_atomic_load_add_local>;