9c1b82599d
Previously reverted in8b446ea2baReapplying because this commit is NOT DEPENDENT on the reverted commitfc21f2d7ba, which broke the ASAN buildbot. See https://reviews.llvm.org/rGfc21f2d7bae2e0be630470cc7ca9323ed5859892 for more information. The arguments to a PHI may represent a recurrence by eventually using the output of the PHI itself. This is now handled by checking for cycles in the control flow. If a PHI is not in a recurrence, it is now able to report multiple offsets instead of conservatively reporting unknown. Reviewed By: jdoerfert Differential Revision: https://reviews.llvm.org/D138991
101 lines
3.9 KiB
LLVM
101 lines
3.9 KiB
LLVM
; RUN: llc < %s | FileCheck %s
|
|
|
|
target triple = "amdgcn-amd-amdhsa"
|
|
|
|
; The call to intrinsic implicitarg_ptr reaches a load through a phi. The
|
|
; offsets of the phi cannot be determined, and hence the attirbutor assumes that
|
|
; hostcall is in use.
|
|
|
|
; CHECK-LABEL: amdhsa.kernels:
|
|
; CHECK: .value_kind: hidden_hostcall_buffer
|
|
; CHECK: .value_kind: hidden_multigrid_sync_arg
|
|
; CHECK-LABEL: .name: kernel_1
|
|
|
|
define amdgpu_kernel void @kernel_1(i32 addrspace(1)* %a, i64 %index1, i64 %index2, i1 %cond) {
|
|
entry:
|
|
%tmp7 = tail call i8 addrspace(4)* @llvm.amdgcn.implicitarg.ptr()
|
|
br i1 %cond, label %old, label %new
|
|
|
|
old: ; preds = %entry
|
|
%tmp4 = getelementptr i8, i8 addrspace(4)* %tmp7, i64 %index1
|
|
br label %join
|
|
|
|
new: ; preds = %entry
|
|
%tmp12 = getelementptr inbounds i8, i8 addrspace(4)* %tmp7, i64 %index2
|
|
br label %join
|
|
|
|
join: ; preds = %new, %old
|
|
%.in.in.in = phi i8 addrspace(4)* [ %tmp12, %new ], [ %tmp4, %old ]
|
|
%.in.in = bitcast i8 addrspace(4)* %.in.in.in to i16 addrspace(4)*
|
|
|
|
;;; THIS USE is where the offset into implicitarg_ptr is unknown
|
|
%.in = load i16, i16 addrspace(4)* %.in.in, align 2
|
|
|
|
%idx.ext = sext i16 %.in to i64
|
|
%add.ptr3 = getelementptr inbounds i32, i32 addrspace(1)* %a, i64 %idx.ext
|
|
%tmp16 = atomicrmw add i32 addrspace(1)* %add.ptr3, i32 15 syncscope("agent-one-as") monotonic, align 4
|
|
ret void
|
|
}
|
|
|
|
; The call to intrinsic implicitarg_ptr is combined with an offset produced by
|
|
; select'ing between two constants, before it is eventually used in a GEP to
|
|
; form the address of a load. This test ensures that AAPointerInfo can look
|
|
; through the select to maintain a set of indices, so that it can precisely
|
|
; determine that hostcall and other expensive implicit args are not in use.
|
|
|
|
; CHECK-NOT: hidden_hostcall_buffer
|
|
; CHECK-NOT: hidden_multigrid_sync_arg
|
|
; CHECK-LABEL: .name: kernel_2
|
|
|
|
define amdgpu_kernel void @kernel_2(i32 addrspace(1)* %a, i1 %cond) {
|
|
entry:
|
|
%tmp7 = tail call i8 addrspace(4)* @llvm.amdgcn.implicitarg.ptr()
|
|
%tmp5 = select i1 %cond, i64 12, i64 18
|
|
%tmp6 = getelementptr inbounds i8, i8 addrspace(4)* %tmp7, i64 %tmp5
|
|
%tmp8 = bitcast i8 addrspace(4)* %tmp6 to i16 addrspace(4)*
|
|
|
|
;;; THIS USE is where multiple offsets are possible, relative to implicitarg_ptr
|
|
%tmp9 = load i16, i16 addrspace(4)* %tmp8, align 2
|
|
|
|
%idx.ext = sext i16 %tmp9 to i64
|
|
%add.ptr3 = getelementptr inbounds i32, i32 addrspace(1)* %a, i64 %idx.ext
|
|
%tmp16 = atomicrmw add i32 addrspace(1)* %add.ptr3, i32 15 syncscope("agent-one-as") monotonic, align 4
|
|
ret void
|
|
}
|
|
|
|
; CHECK-NOT: hidden_hostcall_buffer
|
|
; CHECK-NOT: hidden_multigrid_sync_arg
|
|
; CHECK-LABEL: .name: kernel_3
|
|
|
|
define amdgpu_kernel void @kernel_3(i32 addrspace(1)* %a, i1 %cond) {
|
|
entry:
|
|
%tmp7 = tail call i8 addrspace(4)* @llvm.amdgcn.implicitarg.ptr()
|
|
br i1 %cond, label %old, label %new
|
|
|
|
old: ; preds = %entry
|
|
%tmp4 = getelementptr i8, i8 addrspace(4)* %tmp7, i64 12
|
|
br label %join
|
|
|
|
new: ; preds = %entry
|
|
%tmp12 = getelementptr inbounds i8, i8 addrspace(4)* %tmp7, i64 18
|
|
br label %join
|
|
|
|
join: ; preds = %new, %old
|
|
%.in.in.in = phi i8 addrspace(4)* [ %tmp12, %new ], [ %tmp4, %old ]
|
|
%.in.in = bitcast i8 addrspace(4)* %.in.in.in to i16 addrspace(4)*
|
|
|
|
;;; THIS USE of implicitarg_ptr should not produce hostcall metadata
|
|
%.in = load i16, i16 addrspace(4)* %.in.in, align 2
|
|
|
|
%idx.ext = sext i16 %.in to i64
|
|
%add.ptr3 = getelementptr inbounds i32, i32 addrspace(1)* %a, i64 %idx.ext
|
|
%tmp16 = atomicrmw add i32 addrspace(1)* %add.ptr3, i32 15 syncscope("agent-one-as") monotonic, align 4
|
|
ret void
|
|
}
|
|
|
|
declare i32 @llvm.amdgcn.workitem.id.x()
|
|
|
|
declare align 4 i8 addrspace(4)* @llvm.amdgcn.implicitarg.ptr()
|
|
|
|
declare i32 @llvm.amdgcn.workgroup.id.x()
|