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
53
54
55
56
57
58
59
60
61
62
63
|
; RUN: llc < %s -march=amdgcn -mcpu=verde -verify-machineinstrs | FileCheck --check-prefix=SI --check-prefix=FUNC %s
; RUN: llc < %s -march=amdgcn -mcpu=tonga -verify-machineinstrs | FileCheck --check-prefix=SI --check-prefix=FUNC %s
; FUNC-LABEL: {{^}}break_inserted_outside_of_loop:
; SI: [[LOOP_LABEL:[A-Z0-9]+]]:
; Lowered break instructin:
; SI: s_or_b64
; Lowered Loop instruction:
; SI: s_andn2_b64
; s_cbranch_execnz [[LOOP_LABEL]]
; SI: s_endpgm
define void @break_inserted_outside_of_loop(i32 addrspace(1)* %out, i32 %a, i32 %b) {
main_body:
%0 = and i32 %a, %b
%1 = trunc i32 %0 to i1
br label %ENDIF
ENDLOOP:
store i32 0, i32 addrspace(1)* %out
ret void
ENDIF:
br i1 %1, label %ENDLOOP, label %ENDIF
}
; FUNC-LABEL: {{^}}phi_cond_outside_loop:
; FIXME: This could be folded into the s_or_b64 instruction
; SI: s_mov_b64 [[ZERO:s\[[0-9]+:[0-9]+\]]], 0
; SI: [[LOOP_LABEL:[A-Z0-9]+]]
; SI: v_cmp_ne_i32_e64 [[COND:s\[[0-9]+:[0-9]+\]]], v{{[0-9]+}}, 0
; SI_IF_BREAK instruction:
; SI: s_or_b64 [[BREAK:s\[[0-9]+:[0-9]+\]]], [[COND]], [[ZERO]]
; SI_LOOP instruction:
; SI: s_andn2_b64 exec, exec, [[BREAK]]
; SI: s_cbranch_execnz [[LOOP_LABEL]]
; SI: s_endpgm
define void @phi_cond_outside_loop(i32 %a, i32 %b) {
entry:
%0 = icmp eq i32 %a , 0
br i1 %0, label %if, label %else
if:
br label %endif
else:
%1 = icmp eq i32 %b, 0
br label %endif
endif:
%2 = phi i1 [0, %if], [%1, %else]
br label %loop
loop:
br i1 %2, label %exit, label %loop
exit:
ret void
}
|
