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[RISCV][VLOPT] Add vadc to isSupportedInstr #122345

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Merged
merged 1 commit into from
Jan 10, 2025
Merged

[RISCV][VLOPT] Add vadc to isSupportedInstr #122345

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4 changes: 4 additions & 0 deletions llvm/lib/Target/RISCV/RISCVVLOptimizer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -948,6 +948,10 @@ static bool isSupportedInstr(const MachineInstr &MI) {
case RISCV::VMERGE_VIM:
case RISCV::VMERGE_VVM:
case RISCV::VMERGE_VXM:
// Vector Integer Add-with-Carry / Subtract-with-Borrow Instructions
case RISCV::VADC_VIM:
case RISCV::VADC_VVM:
case RISCV::VADC_VXM:
// Vector Widening Integer Multiply-Add Instructions
case RISCV::VWMACCU_VV:
case RISCV::VWMACCU_VX:
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60 changes: 60 additions & 0 deletions llvm/test/CodeGen/RISCV/rvv/vl-opt-instrs.ll
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Expand Up @@ -3596,6 +3596,66 @@ define <vscale x 4 x i32> @vmerge_vim(<vscale x 4 x i32> %a, <vscale x 4 x i1> %
ret <vscale x 4 x i32> %2
}

define <vscale x 4 x i32> @vadc_vvm(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b, <vscale x 4 x i1> %c, iXLen %vl) {
; NOVLOPT-LABEL: vadc_vvm:
; NOVLOPT: # %bb.0:
; NOVLOPT-NEXT: vsetvli a1, zero, e32, m2, ta, ma
; NOVLOPT-NEXT: vadc.vvm v8, v8, v10, v0
; NOVLOPT-NEXT: vsetvli zero, a0, e32, m2, ta, ma
; NOVLOPT-NEXT: vadd.vv v8, v8, v10
; NOVLOPT-NEXT: ret
;
; VLOPT-LABEL: vadc_vvm:
; VLOPT: # %bb.0:
; VLOPT-NEXT: vsetvli zero, a0, e32, m2, ta, ma
; VLOPT-NEXT: vadc.vvm v8, v8, v10, v0
; VLOPT-NEXT: vadd.vv v8, v8, v10
; VLOPT-NEXT: ret
%1 = call <vscale x 4 x i32> @llvm.riscv.vadc.nxv4i32.nxv4i32(<vscale x 4 x i32> poison, <vscale x 4 x i32> %a, <vscale x 4 x i32> %b, <vscale x 4 x i1> %c, iXLen -1)
%2 = call <vscale x 4 x i32> @llvm.riscv.vadd.nxv4i32.nxv4i32(<vscale x 4 x i32> poison, <vscale x 4 x i32> %1, <vscale x 4 x i32> %b, iXLen %vl)
ret <vscale x 4 x i32> %2
}

define <vscale x 4 x i32> @vadc_vxm(<vscale x 4 x i32> %a, i32 %b, <vscale x 4 x i1> %c, iXLen %vl) {
; NOVLOPT-LABEL: vadc_vxm:
; NOVLOPT: # %bb.0:
; NOVLOPT-NEXT: vsetvli a2, zero, e32, m2, ta, ma
; NOVLOPT-NEXT: vadc.vxm v8, v8, a0, v0
; NOVLOPT-NEXT: vsetvli zero, a1, e32, m2, ta, ma
; NOVLOPT-NEXT: vadd.vv v8, v8, v8
; NOVLOPT-NEXT: ret
;
; VLOPT-LABEL: vadc_vxm:
; VLOPT: # %bb.0:
; VLOPT-NEXT: vsetvli zero, a1, e32, m2, ta, ma
; VLOPT-NEXT: vadc.vxm v8, v8, a0, v0
; VLOPT-NEXT: vadd.vv v8, v8, v8
; VLOPT-NEXT: ret
%1 = call <vscale x 4 x i32> @llvm.riscv.vadc.nxv4i32.i32(<vscale x 4 x i32> poison, <vscale x 4 x i32> %a, i32 %b, <vscale x 4 x i1> %c, iXLen -1)
%2 = call <vscale x 4 x i32> @llvm.riscv.vadd.nxv4i32.nxv4i32(<vscale x 4 x i32> poison, <vscale x 4 x i32> %1, <vscale x 4 x i32> %1, iXLen %vl)
ret <vscale x 4 x i32> %2
}

define <vscale x 4 x i32> @vadc_vim(<vscale x 4 x i32> %a, <vscale x 4 x i1> %c, iXLen %vl) {
; NOVLOPT-LABEL: vadc_vim:
; NOVLOPT: # %bb.0:
; NOVLOPT-NEXT: vsetvli a1, zero, e32, m2, ta, ma
; NOVLOPT-NEXT: vadc.vim v8, v8, 9, v0
; NOVLOPT-NEXT: vsetvli zero, a0, e32, m2, ta, ma
; NOVLOPT-NEXT: vadd.vv v8, v8, v8
; NOVLOPT-NEXT: ret
;
; VLOPT-LABEL: vadc_vim:
; VLOPT: # %bb.0:
; VLOPT-NEXT: vsetvli zero, a0, e32, m2, ta, ma
; VLOPT-NEXT: vadc.vim v8, v8, 9, v0
; VLOPT-NEXT: vadd.vv v8, v8, v8
; VLOPT-NEXT: ret
%1 = call <vscale x 4 x i32> @llvm.riscv.vadc.nxv4i32.i32(<vscale x 4 x i32> poison, <vscale x 4 x i32> %a, i32 9, <vscale x 4 x i1> %c, iXLen -1)
%2 = call <vscale x 4 x i32> @llvm.riscv.vadd.nxv4i32.nxv4i32(<vscale x 4 x i32> poison, <vscale x 4 x i32> %1, <vscale x 4 x i32> %1, iXLen %vl)
ret <vscale x 4 x i32> %2
}

define <vscale x 4 x i32> @vaadd_vv(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b, iXLen %vl) {
; NOVLOPT-LABEL: vaadd_vv:
; NOVLOPT: # %bb.0:
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