3a20597776
Implement an intrinsic for use lowering LDS variables to different addresses from different kernels. This will allow kernels that cannot reach an LDS variable to avoid wasting space for it. There are a number of implicit arguments accessed by intrinsic already so this implementation closely follows the existing handling. It is slightly novel in that this SGPR is written by the kernel prologue. It is necessary in the general case to put variables at different addresses such that they can be compactly allocated and thus necessary for an indirect function call to have some means of determining where a given variable was allocated. Claiming an arbitrary SGPR into which an integer can be written by the kernel, in this implementation based on metadata associated with that kernel, which is then passed on to indirect call sites is sufficient to determine the variable address. The intent is to emit a __const array of LDS addresses and index into it. Reviewed By: arsenm Differential Revision: https://reviews.llvm.org/D125060
36 lines
1.3 KiB
LLVM
36 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-globals
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; RUN: opt -S -mtriple=amdgcn-amd- -amdgpu-attributor %s | FileCheck %s
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; If the kernel does not have the uniform-work-group-attribute, set both callee and caller as false
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; We write to a global so that the attributor don't deletes the function.
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@x = global i32 0
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;.
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; CHECK: @[[X:[a-zA-Z0-9_$"\\.-]+]] = global i32 0
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;.
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define void @foo() #0 {
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; CHECK-LABEL: define {{[^@]+}}@foo
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; CHECK-SAME: () #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: store i32 0, i32* @x, align 4
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; CHECK-NEXT: ret void
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;
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store i32 0, i32* @x
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ret void
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}
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define amdgpu_kernel void @kernel1() #1 {
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; CHECK-LABEL: define {{[^@]+}}@kernel1
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; CHECK-SAME: () #[[ATTR0]] {
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: ret void
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;
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call void @foo()
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ret void
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}
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attributes #0 = { "uniform-work-group-size"="true" }
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;.
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; CHECK: attributes #[[ATTR0]] = { "amdgpu-no-dispatch-id" "amdgpu-no-dispatch-ptr" "amdgpu-no-heap-ptr" "amdgpu-no-hostcall-ptr" "amdgpu-no-implicitarg-ptr" "amdgpu-no-lds-kernel-id" "amdgpu-no-multigrid-sync-arg" "amdgpu-no-queue-ptr" "amdgpu-no-workgroup-id-x" "amdgpu-no-workgroup-id-y" "amdgpu-no-workgroup-id-z" "amdgpu-no-workitem-id-x" "amdgpu-no-workitem-id-y" "amdgpu-no-workitem-id-z" "uniform-work-group-size"="false" }
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;.
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