blob: dce4162c246247b41307196f8113b8b6b50674cf (
plain)
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
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -verify-machineinstrs -o /dev/null 2>&1 %s | FileCheck -check-prefix=ERR %s
; ERR: warning: inline asm clobber list contains reserved registers: v42
; ERR: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.
define amdgpu_kernel void @clobber_occupancy_limited_vgpr() #0 {
entry:
call void asm sideeffect "; clobber $0", "~{v42}"()
ret void
}
; ERR: warning: inline asm clobber list contains reserved registers: v[42:43]
; ERR: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.
define amdgpu_kernel void @clobber_occupancy_limited_vgpr64() #0 {
entry:
call void asm sideeffect "; clobber $0", "~{v[42:43]}"()
ret void
}
; ERR: warning: inline asm clobber list contains reserved registers: m0
; ERR: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.
define amdgpu_kernel void @clobber_m0() {
entry:
call void asm sideeffect "; clobber $0", "~{m0}"()
ret void
}
; ERR: warning: inline asm clobber list contains reserved registers: exec
; ERR: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.
define amdgpu_kernel void @clobber_exec() {
entry:
call void asm sideeffect "; clobber $0", "~{exec}"()
ret void
}
; ERR: warning: inline asm clobber list contains reserved registers: exec_lo
; ERR: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.
define amdgpu_kernel void @clobber_exec_lo() {
entry:
call void asm sideeffect "; clobber $0", "~{exec_lo}"()
ret void
}
; FIXME: This should warn too
; ERR-NOT: warning: inline asm clobber list contains reserved registers
define amdgpu_kernel void @def_exec(ptr addrspace(1) %ptr) {
entry:
%exec = call i64 asm sideeffect "; def $0", "={exec}"()
store i64 %exec, ptr addrspace(1) %ptr
ret void
}
attributes #0 = { "amdgpu-waves-per-eu"="10,10" }
|
