11b7ee974a
With spilling into AGPRs enabled we cannot reliably predict if we need to save FP or not. We may finally spill everything into AGPRs and never touch stack. In this case we still may save FP. This is deficiency but not an error, so avoid the assert. Differential Revision: https://reviews.llvm.org/D107404
30 lines
856 B
LLVM
30 lines
856 B
LLVM
; RUN: llc -march=amdgcn -mcpu=gfx908 -verify-machineinstrs < %s | FileCheck -check-prefixes=GCN,GFX908 %s
|
|
; RUN: llc -march=amdgcn -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -check-prefixes=GCN,GFX900 %s
|
|
|
|
define void @foo() {
|
|
bb:
|
|
ret void
|
|
}
|
|
|
|
; FIXME: We spill v40 into AGPR, but still save and restore FP
|
|
; which is not needed in this case.
|
|
|
|
; GCN-LABEL: {{^}}caller:
|
|
|
|
; GFX900: s_mov_b32 [[SAVED_FP:s[0-9]+]], s33
|
|
; GFX900: s_mov_b32 s33, s32
|
|
; GFX908-NOT: s_mov_b32 s33, s32
|
|
; GFX900: buffer_store_dword
|
|
; GFX908-DAG: s_mov_b32 [[SAVED_FP:s[0-9]+]], s33
|
|
; GFX908-DAG: v_accvgpr_write_b32
|
|
; GCN: s_swappc_b64
|
|
; GFX900: buffer_load_dword
|
|
; GFX908: v_accvgpr_read_b32
|
|
; GCN: s_mov_b32 s33, [[SAVED_FP]]
|
|
define i64 @caller() {
|
|
bb:
|
|
call void asm sideeffect "", "~{v40}" ()
|
|
tail call void @foo()
|
|
ret i64 0
|
|
}
|