3bc125490a
This PR updates the `Verifier` to enforce that `alloca` instructions on AMDGPU must be in AS5. This prevents hitting a misleading backend error like "unable to select FrameIndex," which makes it look like a backend bug when it's actually an IR-level issue.
46 lines
1.6 KiB
LLVM
46 lines
1.6 KiB
LLVM
; RUN: opt -S -mtriple=amdgcn-- -passes=amdgpu-lower-module-lds < %s | FileCheck %s
|
|
|
|
; Tests that the LDS lowering pass handles indirect references to LDS GVs; i.e.
|
|
; that it lowers to accesses into the generated LDS struct if these references
|
|
; are deep in the call graph starting at the kernel.
|
|
|
|
@lds_item_to_indirectly_load = internal addrspace(3) global ptr poison, align 8
|
|
|
|
%store_type = type { i32, ptr }
|
|
@place_to_store_indirect_caller = internal addrspace(3) global %store_type poison, align 8
|
|
|
|
define amdgpu_kernel void @offloading_kernel() {
|
|
store ptr @indirectly_load_lds, ptr addrspace(3) getelementptr inbounds nuw (i8, ptr addrspace(3) @place_to_store_indirect_caller, i32 0), align 8
|
|
call void @call_unknown()
|
|
ret void
|
|
}
|
|
|
|
define void @call_unknown() {
|
|
%alloca = alloca ptr, align 8, addrspace(5)
|
|
%alloca.cast = addrspacecast ptr addrspace(5) %alloca to ptr
|
|
%ret = call i32 %alloca.cast()
|
|
ret void
|
|
}
|
|
|
|
define void @indirectly_load_lds() {
|
|
call void @directly_load_lds()
|
|
ret void
|
|
}
|
|
|
|
define void @directly_load_lds() {
|
|
%2 = load ptr, ptr addrspace(3) @lds_item_to_indirectly_load, align 8
|
|
ret void
|
|
}
|
|
|
|
; CHECK: %[[LDS_STRUCT_TY:.*]] = type { %store_type, ptr }
|
|
; CHECK: @[[LDS_STRUCT:.*]] = {{.*}} %[[LDS_STRUCT_TY]] {{.*}} !absolute_symbol
|
|
|
|
; CHECK: define amdgpu_kernel void @offloading_kernel() {{.*}} {
|
|
; CHECK: store ptr @indirectly_load_lds, {{.*}} @[[LDS_STRUCT]]
|
|
; CHECK: call void @call_unknown()
|
|
; CHECK: }
|
|
|
|
; CHECK: define void @directly_load_lds() {
|
|
; CHECK: load ptr, {{.*}} (%[[LDS_STRUCT_TY]], {{.*}} @[[LDS_STRUCT]], i32 0, i32 1)
|
|
; CHECK: }
|