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llvm-project/llvm/test/CodeGen/AMDGPU/lower-kernel-and-module-lds.ll
Jon Chesterfield 35f2584ef9 [amdgpu] Error, instead of miscompile, anonymous kernels using lds 
The association between kernel and struct is done by symbol name.
This doesn't work robustly for anonymous kernels as shown by the modified
test case.

An alternative association between function and struct can be constructed
if necessary, probably though metadata, but on the basis that we currently
miscompile anonymous kernels and that they are difficult to construct from
application code and difficult to call from the runtime, this patch makes
it a fatal error for now.

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D134741
2022-09-28 16:30:04 +01:00

116 lines
7.4 KiB
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; RUN: opt -S -mtriple=amdgcn-- -amdgpu-lower-module-lds < %s | FileCheck %s
; RUN: opt -S -mtriple=amdgcn-- -passes=amdgpu-lower-module-lds < %s | FileCheck %s
@lds.size.1.align.1 = internal unnamed_addr addrspace(3) global [1 x i8] undef, align 1
@lds.size.2.align.2 = internal unnamed_addr addrspace(3) global [2 x i8] undef, align 2
@lds.size.4.align.4 = internal unnamed_addr addrspace(3) global [4 x i8] undef, align 4
@lds.size.8.align.8 = internal unnamed_addr addrspace(3) global [8 x i8] undef, align 8
@lds.size.16.align.16 = internal unnamed_addr addrspace(3) global [16 x i8] undef, align 16
; CHECK: %llvm.amdgcn.module.lds.t = type { [8 x i8], [1 x i8] }
; CHECK: %llvm.amdgcn.kernel.k0.lds.t = type { [16 x i8], [4 x i8], [2 x i8] }
; CHECK: %llvm.amdgcn.kernel.k1.lds.t = type { [16 x i8], [4 x i8], [2 x i8] }
; CHECK: %llvm.amdgcn.kernel.k2.lds.t = type { [2 x i8] }
; CHECK: %llvm.amdgcn.kernel.k3.lds.t = type { [4 x i8] }
;.
; CHECK: @llvm.amdgcn.module.lds = internal addrspace(3) global %llvm.amdgcn.module.lds.t undef, align 8
; CHECK: @llvm.compiler.used = appending global [1 x i8*] [i8* addrspacecast (i8 addrspace(3)* getelementptr inbounds (%llvm.amdgcn.module.lds.t, %llvm.amdgcn.module.lds.t addrspace(3)* @llvm.amdgcn.module.lds, i32 0, i32 0, i32 0) to i8*)], section "llvm.metadata"
; CHECK: @llvm.amdgcn.kernel.k0.lds = internal addrspace(3) global %llvm.amdgcn.kernel.k0.lds.t undef, align 16
; CHECK: @llvm.amdgcn.kernel.k1.lds = internal addrspace(3) global %llvm.amdgcn.kernel.k1.lds.t undef, align 16
; CHECK: @llvm.amdgcn.kernel.k2.lds = internal addrspace(3) global %llvm.amdgcn.kernel.k2.lds.t undef, align 2
; CHECK: @llvm.amdgcn.kernel.k3.lds = internal addrspace(3) global %llvm.amdgcn.kernel.k3.lds.t undef, align 4
;.
define amdgpu_kernel void @k0() #0 {
; CHECK-LABEL: @k0(
; CHECK-NEXT: %lds.size.1.align.1.bc = bitcast [1 x i8] addrspace(3)* getelementptr inbounds (%llvm.amdgcn.module.lds.t, %llvm.amdgcn.module.lds.t addrspace(3)* @llvm.amdgcn.module.lds, i32 0, i32 1) to i8 addrspace(3)*
; CHECK-NEXT: store i8 1, i8 addrspace(3)* %lds.size.1.align.1.bc, align 8
; CHECK-NEXT: %lds.size.2.align.2.bc = bitcast [2 x i8] addrspace(3)* getelementptr inbounds (%llvm.amdgcn.kernel.k0.lds.t, %llvm.amdgcn.kernel.k0.lds.t addrspace(3)* @llvm.amdgcn.kernel.k0.lds, i32 0, i32 2) to i8 addrspace(3)*
; CHECK-NEXT: store i8 2, i8 addrspace(3)* %lds.size.2.align.2.bc, align 4
; CHECK-NEXT: %lds.size.4.align.4.bc = bitcast [4 x i8] addrspace(3)* getelementptr inbounds (%llvm.amdgcn.kernel.k0.lds.t, %llvm.amdgcn.kernel.k0.lds.t addrspace(3)* @llvm.amdgcn.kernel.k0.lds, i32 0, i32 1) to i8 addrspace(3)*
; CHECK-NEXT: store i8 4, i8 addrspace(3)* %lds.size.4.align.4.bc, align 16
; CHECK-NEXT: %lds.size.16.align.16.bc = bitcast [16 x i8] addrspace(3)* getelementptr inbounds (%llvm.amdgcn.kernel.k0.lds.t, %llvm.amdgcn.kernel.k0.lds.t addrspace(3)* @llvm.amdgcn.kernel.k0.lds, i32 0, i32 0) to i8 addrspace(3)*
; CHECK-NEXT: store i8 16, i8 addrspace(3)* %lds.size.16.align.16.bc, align 16
; CHECK-NEXT: ret void
;
%lds.size.1.align.1.bc = bitcast [1 x i8] addrspace(3)* @lds.size.1.align.1 to i8 addrspace(3)*
store i8 1, i8 addrspace(3)* %lds.size.1.align.1.bc, align 1
%lds.size.2.align.2.bc = bitcast [2 x i8] addrspace(3)* @lds.size.2.align.2 to i8 addrspace(3)*
store i8 2, i8 addrspace(3)* %lds.size.2.align.2.bc, align 2
%lds.size.4.align.4.bc = bitcast [4 x i8] addrspace(3)* @lds.size.4.align.4 to i8 addrspace(3)*
store i8 4, i8 addrspace(3)* %lds.size.4.align.4.bc, align 4
%lds.size.16.align.16.bc = bitcast [16 x i8] addrspace(3)* @lds.size.16.align.16 to i8 addrspace(3)*
store i8 16, i8 addrspace(3)* %lds.size.16.align.16.bc, align 16
ret void
}
define amdgpu_kernel void @k1() #0 {
; CHECK-LABEL: @k1(
; CHECK-NEXT: %lds.size.2.align.2.bc = bitcast [2 x i8] addrspace(3)* getelementptr inbounds (%llvm.amdgcn.kernel.k1.lds.t, %llvm.amdgcn.kernel.k1.lds.t addrspace(3)* @llvm.amdgcn.kernel.k1.lds, i32 0, i32 2) to i8 addrspace(3)*
; CHECK-NEXT: store i8 2, i8 addrspace(3)* %lds.size.2.align.2.bc, align 4
; CHECK-NEXT: %lds.size.4.align.4.bc = bitcast [4 x i8] addrspace(3)* getelementptr inbounds (%llvm.amdgcn.kernel.k1.lds.t, %llvm.amdgcn.kernel.k1.lds.t addrspace(3)* @llvm.amdgcn.kernel.k1.lds, i32 0, i32 1) to i8 addrspace(3)*
; CHECK-NEXT: store i8 4, i8 addrspace(3)* %lds.size.4.align.4.bc, align 16
; CHECK-NEXT: %lds.size.16.align.16.bc = bitcast [16 x i8] addrspace(3)* getelementptr inbounds (%llvm.amdgcn.kernel.k1.lds.t, %llvm.amdgcn.kernel.k1.lds.t addrspace(3)* @llvm.amdgcn.kernel.k1.lds, i32 0, i32 0) to i8 addrspace(3)*
; CHECK-NEXT: store i8 16, i8 addrspace(3)* %lds.size.16.align.16.bc, align 16
; CHECK-NEXT: ret void
;
%lds.size.2.align.2.bc = bitcast [2 x i8] addrspace(3)* @lds.size.2.align.2 to i8 addrspace(3)*
store i8 2, i8 addrspace(3)* %lds.size.2.align.2.bc, align 2
%lds.size.4.align.4.bc = bitcast [4 x i8] addrspace(3)* @lds.size.4.align.4 to i8 addrspace(3)*
store i8 4, i8 addrspace(3)* %lds.size.4.align.4.bc, align 4
%lds.size.16.align.16.bc = bitcast [16 x i8] addrspace(3)* @lds.size.16.align.16 to i8 addrspace(3)*
store i8 16, i8 addrspace(3)* %lds.size.16.align.16.bc, align 16
ret void
}
define amdgpu_kernel void @k2() #0 {
; CHECK-LABEL: @k2(
; CHECK-NEXT: %lds.size.2.align.2.bc = bitcast [2 x i8] addrspace(3)* getelementptr inbounds (%llvm.amdgcn.kernel.k2.lds.t, %llvm.amdgcn.kernel.k2.lds.t addrspace(3)* @llvm.amdgcn.kernel.k2.lds, i32 0, i32 0) to i8 addrspace(3)*
; CHECK-NEXT: store i8 2, i8 addrspace(3)* %lds.size.2.align.2.bc, align 2
; CHECK-NEXT: ret void
;
%lds.size.2.align.2.bc = bitcast [2 x i8] addrspace(3)* @lds.size.2.align.2 to i8 addrspace(3)*
store i8 2, i8 addrspace(3)* %lds.size.2.align.2.bc, align 2
ret void
}
define amdgpu_kernel void @k3() #0 {
; CHECK-LABEL: @k3(
; CHECK-NEXT: %lds.size.4.align.4.bc = bitcast [4 x i8] addrspace(3)* getelementptr inbounds (%llvm.amdgcn.kernel.k3.lds.t, %llvm.amdgcn.kernel.k3.lds.t addrspace(3)* @llvm.amdgcn.kernel.k3.lds, i32 0, i32 0) to i8 addrspace(3)*
; CHECK-NEXT: store i8 4, i8 addrspace(3)* %lds.size.4.align.4.bc, align 4
; CHECK-NEXT: ret void
;
%lds.size.4.align.4.bc = bitcast [4 x i8] addrspace(3)* @lds.size.4.align.4 to i8 addrspace(3)*
store i8 4, i8 addrspace(3)* %lds.size.4.align.4.bc, align 4
ret void
}
define void @f0() {
; CHECK-LABEL: @f0(
; CHECK-NEXT: %lds.size.1.align.1.bc = bitcast [1 x i8] addrspace(3)* getelementptr inbounds (%llvm.amdgcn.module.lds.t, %llvm.amdgcn.module.lds.t addrspace(3)* @llvm.amdgcn.module.lds, i32 0, i32 1) to i8 addrspace(3)*
; CHECK-NEXT: store i8 1, i8 addrspace(3)* %lds.size.1.align.1.bc, align 8
; CHECK-NEXT: %lds.size.8.align.8.bc = bitcast [8 x i8] addrspace(3)* getelementptr inbounds (%llvm.amdgcn.module.lds.t, %llvm.amdgcn.module.lds.t addrspace(3)* @llvm.amdgcn.module.lds, i32 0, i32 0) to i8 addrspace(3)*
; CHECK-NEXT: store i8 8, i8 addrspace(3)* %lds.size.8.align.8.bc, align 8
; CHECK-NEXT: ret void
;
%lds.size.1.align.1.bc = bitcast [1 x i8] addrspace(3)* @lds.size.1.align.1 to i8 addrspace(3)*
store i8 1, i8 addrspace(3)* %lds.size.1.align.1.bc, align 1
%lds.size.8.align.8.bc = bitcast [8 x i8] addrspace(3)* @lds.size.8.align.8 to i8 addrspace(3)*
store i8 8, i8 addrspace(3)* %lds.size.8.align.8.bc, align 4
ret void
}
attributes #0 = { "amdgpu-elide-module-lds" }
; CHECK: attributes #0 = { "amdgpu-elide-module-lds" }
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