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InferAddressSpaces: Handle prefetch intrinsic #101982

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Merged
merged 1 commit into from
Aug 5, 2024
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InferAddressSpaces: Handle prefetch intrinsic #101982

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8 changes: 8 additions & 0 deletions llvm/lib/Transforms/Scalar/InferAddressSpaces.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -401,6 +401,13 @@ bool InferAddressSpacesImpl::rewriteIntrinsicOperands(IntrinsicInst *II,
II->setCalledFunction(NewDecl);
return true;
}
case Intrinsic::prefetch: {
Function *NewDecl =
Intrinsic::getDeclaration(M, II->getIntrinsicID(), {NewV->getType()});
II->setArgOperand(0, NewV);
II->setCalledFunction(NewDecl);
return true;
}
default: {
Value *Rewrite = TTI->rewriteIntrinsicWithAddressSpace(II, OldV, NewV);
if (!Rewrite)
Expand All @@ -423,6 +430,7 @@ void InferAddressSpacesImpl::collectRewritableIntrinsicOperands(
PostorderStack, Visited);
break;
case Intrinsic::masked_gather:
case Intrinsic::prefetch:
appendsFlatAddressExpressionToPostorderStack(II->getArgOperand(0),
PostorderStack, Visited);
break;
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59 changes: 59 additions & 0 deletions llvm/test/Transforms/InferAddressSpaces/AMDGPU/prefetch.ll
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@@ -0,0 +1,59 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -mtriple=amdgcn-amd-amdhsa -passes=infer-address-spaces %s | FileCheck %s

define void @prefetch_shared_to_flat(ptr addrspace(3) %group.ptr) {
; CHECK-LABEL: define void @prefetch_shared_to_flat(
; CHECK-SAME: ptr addrspace(3) [[GROUP_PTR:%.*]]) {
; CHECK-NEXT: tail call void @llvm.prefetch.p3(ptr addrspace(3) [[GROUP_PTR]], i32 0, i32 0, i32 1)
; CHECK-NEXT: ret void
;
%cast = addrspacecast ptr addrspace(3) %group.ptr to ptr
tail call void @llvm.prefetch.p0(ptr %cast, i32 0, i32 0, i32 1)
ret void
}

define void @prefetch_global_to_flat(ptr addrspace(1) %global.ptr) {
; CHECK-LABEL: define void @prefetch_global_to_flat(
; CHECK-SAME: ptr addrspace(1) [[GLOBAL_PTR:%.*]]) {
; CHECK-NEXT: tail call void @llvm.prefetch.p1(ptr addrspace(1) [[GLOBAL_PTR]], i32 0, i32 0, i32 1)
; CHECK-NEXT: ret void
;
%cast = addrspacecast ptr addrspace(1) %global.ptr to ptr
tail call void @llvm.prefetch.p0(ptr addrspace(0) %cast, i32 0, i32 0, i32 1)
ret void
}

define void @prefetch_constant_to_flat(ptr addrspace(4) %const.ptr) {
; CHECK-LABEL: define void @prefetch_constant_to_flat(
; CHECK-SAME: ptr addrspace(4) [[CONST_PTR:%.*]]) {
; CHECK-NEXT: tail call void @llvm.prefetch.p4(ptr addrspace(4) [[CONST_PTR]], i32 0, i32 0, i32 1)
; CHECK-NEXT: ret void
;
%cast = addrspacecast ptr addrspace(4) %const.ptr to ptr
tail call void @llvm.prefetch.p0(ptr %cast, i32 0, i32 0, i32 1)
ret void
}

define void @prefetch_flat_to_shared(ptr %flat.ptr) {
; CHECK-LABEL: define void @prefetch_flat_to_shared(
; CHECK-SAME: ptr [[FLAT_PTR:%.*]]) {
; CHECK-NEXT: [[CAST:%.*]] = addrspacecast ptr [[FLAT_PTR]] to ptr addrspace(3)
; CHECK-NEXT: tail call void @llvm.prefetch.p3(ptr addrspace(3) [[CAST]], i32 0, i32 0, i32 1)
; CHECK-NEXT: ret void
;
%cast = addrspacecast ptr %flat.ptr to ptr addrspace(3)
tail call void @llvm.prefetch.p3(ptr addrspace(3) %cast, i32 0, i32 0, i32 1)
ret void
}

define void @prefetch_flat_to_global(ptr %flat.ptr) {
; CHECK-LABEL: define void @prefetch_flat_to_global(
; CHECK-SAME: ptr [[FLAT_PTR:%.*]]) {
; CHECK-NEXT: [[CAST:%.*]] = addrspacecast ptr [[FLAT_PTR]] to ptr addrspace(1)
; CHECK-NEXT: tail call void @llvm.prefetch.p1(ptr addrspace(1) [[CAST]], i32 0, i32 0, i32 1)
; CHECK-NEXT: ret void
;
%cast = addrspacecast ptr %flat.ptr to ptr addrspace(1)
tail call void @llvm.prefetch.p1(ptr addrspace(1) %cast, i32 0, i32 0, i32 1)
ret void
}