File: save-fp.ll

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-12
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,496,180 kB
  • sloc: cpp: 5,593,972; ansic: 986,872; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,538; xml: 953; cs: 573; fortran: 567
file content (29 lines) | stat: -rw-r--r-- 856 bytes parent folder | download | duplicates (3) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
 
; 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
}