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[Matrix] Propagate shape information through all binops #141705

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Merged
merged 2 commits into from
May 28, 2025
Merged

[Matrix] Propagate shape information through all binops #141705

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c647c58
[Matrix] Propagate shape information through fdiv insts
jroelofs May 28, 2025
39c585c
Extend split behavior to any binop
jroelofs May 28, 2025
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3 changes: 3 additions & 0 deletions llvm/lib/Transforms/Scalar/LowerMatrixIntrinsics.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -233,6 +233,7 @@ static bool isUniformShape(Value *V) {
case Instruction::FAdd:
case Instruction::FSub:
case Instruction::FMul: // Scalar multiply.
case Instruction::FDiv:
case Instruction::FNeg:
case Instruction::Add:
case Instruction::Mul:
Expand Down Expand Up @@ -2167,6 +2168,8 @@ class LowerMatrixIntrinsics {
return Builder.CreateFAdd(LHS, RHS);
case Instruction::FMul:
return Builder.CreateFMul(LHS, RHS);
case Instruction::FDiv:
return Builder.CreateFDiv(LHS, RHS);
case Instruction::FSub:
return Builder.CreateFSub(LHS, RHS);
default:
Expand Down
26 changes: 26 additions & 0 deletions llvm/test/Transforms/LowerMatrixIntrinsics/binop.ll
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@@ -0,0 +1,26 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes='lower-matrix-intrinsics' -S < %s | FileCheck %s

define void @fdiv_2x2(ptr %num, ptr %denom, ptr %out) {
; CHECK-LABEL: @fdiv_2x2(
; CHECK-NEXT: [[COL_LOAD:%.*]] = load <2 x double>, ptr [[NUM:%.*]], align 32
; CHECK-NEXT: [[VEC_GEP:%.*]] = getelementptr double, ptr [[NUM]], i64 2
; CHECK-NEXT: [[COL_LOAD1:%.*]] = load <2 x double>, ptr [[VEC_GEP]], align 16
; CHECK-NEXT: [[COL_LOAD2:%.*]] = load <2 x double>, ptr [[DENOM:%.*]], align 32
; CHECK-NEXT: [[VEC_GEP3:%.*]] = getelementptr double, ptr [[DENOM]], i64 2
; CHECK-NEXT: [[COL_LOAD4:%.*]] = load <2 x double>, ptr [[VEC_GEP3]], align 16
; CHECK-NEXT: [[TMP1:%.*]] = fdiv <2 x double> [[COL_LOAD]], [[COL_LOAD2]]
; CHECK-NEXT: [[TMP2:%.*]] = fdiv <2 x double> [[COL_LOAD1]], [[COL_LOAD4]]
; CHECK-NEXT: store <2 x double> [[TMP1]], ptr [[OUT:%.*]], align 32
; CHECK-NEXT: [[VEC_GEP5:%.*]] = getelementptr double, ptr [[OUT]], i64 2
; CHECK-NEXT: store <2 x double> [[TMP2]], ptr [[VEC_GEP5]], align 16
; CHECK-NEXT: ret void
;
%numv = load <4 x double>, ptr %num
%denomv = load <4 x double>, ptr %denom
%div = fdiv <4 x double> %numv, %denomv
%divt = call <4 x double> @llvm.matrix.transpose(<4 x double> %div, i32 2, i32 2)
%divtt = call <4 x double> @llvm.matrix.transpose(<4 x double> %divt, i32 2, i32 2)
store <4 x double> %divtt, ptr %out
ret void
}
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