[llvm] ede5709 - [RISCV][TTI] Add llvm.vp.select into canSplatOperand. (#117982)
via llvm-commits
llvm-commits at lists.llvm.org
Mon Dec 2 01:39:51 PST 2024
Author: LiqinWeng
Date: 2024-12-02T17:39:47+08:00
New Revision: ede570980a2534c4a21850777b92505c02924416
URL: https://github.com/llvm/llvm-project/commit/ede570980a2534c4a21850777b92505c02924416
DIFF: https://github.com/llvm/llvm-project/commit/ede570980a2534c4a21850777b92505c02924416.diff
LOG: [RISCV][TTI] Add llvm.vp.select into canSplatOperand. (#117982)
The second operand of llvm.vp.select is a splat operand , it can help
llvm.vp.select fold vv instructions to vx instructions.
Added:
Modified:
llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
llvm/test/CodeGen/RISCV/rvv/sink-splat-operands.ll
Removed:
################################################################################
diff --git a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
index 20f3b717f8b1d8..9a5a48333904c6 100644
--- a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
+++ b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
@@ -2375,6 +2375,7 @@ bool RISCVTTIImpl::canSplatOperand(Instruction *I, int Operand) const {
case Intrinsic::vp_ssub_sat:
case Intrinsic::usub_sat:
case Intrinsic::vp_usub_sat:
+ case Intrinsic::vp_select:
return Operand == 1;
// These intrinsics are commutative.
case Intrinsic::vp_add:
diff --git a/llvm/test/CodeGen/RISCV/rvv/sink-splat-operands.ll b/llvm/test/CodeGen/RISCV/rvv/sink-splat-operands.ll
index c91b02e8f15e47..197ba085c03599 100644
--- a/llvm/test/CodeGen/RISCV/rvv/sink-splat-operands.ll
+++ b/llvm/test/CodeGen/RISCV/rvv/sink-splat-operands.ll
@@ -5498,3 +5498,86 @@ vector.body: ; preds = %vector.body, %entry
for.cond.cleanup: ; preds = %vector.body
ret void
}
+
+define void @sink_splat_vp_select_op1(ptr %a, i32 %x, i32 %vl) {
+; CHECK-LABEL: sink_splat_vp_select_op1:
+; CHECK: # %bb.0: # %entry
+; CHECK-NEXT: lui a4, 1
+; CHECK-NEXT: li a3, 42
+; CHECK-NEXT: slli a5, a2, 32
+; CHECK-NEXT: add a2, a0, a4
+; CHECK-NEXT: srli a4, a5, 32
+; CHECK-NEXT: vsetivli zero, 4, e32, m1, ta, ma
+; CHECK-NEXT: .LBB119_1: # %vector.body
+; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
+; CHECK-NEXT: vle32.v v8, (a0)
+; CHECK-NEXT: vmseq.vx v0, v8, a3
+; CHECK-NEXT: vsetvli zero, a4, e32, m1, ta, ma
+; CHECK-NEXT: vmerge.vxm v8, v8, a1, v0
+; CHECK-NEXT: vsetivli zero, 4, e32, m1, ta, ma
+; CHECK-NEXT: vse32.v v8, (a0)
+; CHECK-NEXT: addi a0, a0, 16
+; CHECK-NEXT: bne a0, a2, .LBB119_1
+; CHECK-NEXT: # %bb.2: # %for.cond.cleanup
+; CHECK-NEXT: ret
+entry:
+ %broadcast.splatinsert = insertelement <4 x i32> poison, i32 %x, i32 0
+ %broadcast.splat = shufflevector <4 x i32> %broadcast.splatinsert, <4 x i32> poison, <4 x i32> zeroinitializer
+ br label %vector.body
+
+vector.body:
+ %index = phi i64 [ 0, %entry ], [ %index.next, %vector.body ]
+ %0 = getelementptr inbounds i32, ptr %a, i64 %index
+ %load = load <4 x i32>, ptr %0, align 4
+ %cond = icmp eq <4 x i32> %load, splat (i32 42)
+ %1 = call <4 x i32> @llvm.vp.select(<4 x i1> %cond, <4 x i32> %broadcast.splat, <4 x i32> %load, i32 %vl)
+ store <4 x i32> %1, ptr %0, align 4
+ %index.next = add nuw i64 %index, 4
+ %2 = icmp eq i64 %index.next, 1024
+ br i1 %2, label %for.cond.cleanup, label %vector.body
+
+for.cond.cleanup:
+ ret void
+}
+
+define void @sink_splat_vp_select_op2(ptr %a, i32 %x, i32 %vl) {
+; CHECK-LABEL: sink_splat_vp_select_op2:
+; CHECK: # %bb.0: # %entry
+; CHECK-NEXT: vsetivli zero, 4, e32, m1, ta, ma
+; CHECK-NEXT: vmv.v.x v8, a1
+; CHECK-NEXT: lui a3, 1
+; CHECK-NEXT: li a1, 42
+; CHECK-NEXT: slli a4, a2, 32
+; CHECK-NEXT: add a2, a0, a3
+; CHECK-NEXT: srli a3, a4, 32
+; CHECK-NEXT: .LBB120_1: # %vector.body
+; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
+; CHECK-NEXT: vle32.v v9, (a0)
+; CHECK-NEXT: vmseq.vx v0, v9, a1
+; CHECK-NEXT: vsetvli zero, a3, e32, m1, ta, ma
+; CHECK-NEXT: vmerge.vvm v9, v8, v9, v0
+; CHECK-NEXT: vsetivli zero, 4, e32, m1, ta, ma
+; CHECK-NEXT: vse32.v v9, (a0)
+; CHECK-NEXT: addi a0, a0, 16
+; CHECK-NEXT: bne a0, a2, .LBB120_1
+; CHECK-NEXT: # %bb.2: # %for.cond.cleanup
+; CHECK-NEXT: ret
+entry:
+ %broadcast.splatinsert = insertelement <4 x i32> poison, i32 %x, i32 0
+ %broadcast.splat = shufflevector <4 x i32> %broadcast.splatinsert, <4 x i32> poison, <4 x i32> zeroinitializer
+ br label %vector.body
+
+vector.body:
+ %index = phi i64 [ 0, %entry ], [ %index.next, %vector.body ]
+ %0 = getelementptr inbounds i32, ptr %a, i64 %index
+ %load = load <4 x i32>, ptr %0, align 4
+ %cond = icmp eq <4 x i32> %load, splat (i32 42)
+ %1 = call <4 x i32> @llvm.vp.select(<4 x i1> %cond, <4 x i32> %load, <4 x i32> %broadcast.splat, i32 %vl)
+ store <4 x i32> %1, ptr %0, align 4
+ %index.next = add nuw i64 %index, 4
+ %2 = icmp eq i64 %index.next, 1024
+ br i1 %2, label %for.cond.cleanup, label %vector.body
+
+for.cond.cleanup:
+ ret void
+}
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