1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -avr-shift-expand -S %s -o - | FileCheck %s
3
4; The avr-shift-expand pass expands large shifts with a non-constant shift
5; amount to a loop. These loops avoid generating a (non-existing) builtin such
6; as __ashlsi3.
7
8target datalayout = "e-P1-p:16:8-i8:8-i16:8-i32:8-i64:8-f32:8-f64:8-n8-a:8"
9target triple = "avr"
10
11define i32 @shl(i32 %value, i32 %amount) addrspace(1) {
12; CHECK-LABEL: @shl(
13; CHECK-NEXT:    [[TMP1:%.*]] = trunc i32 [[AMOUNT:%.*]] to i8
14; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i8 [[TMP1]], 0
15; CHECK-NEXT:    br i1 [[TMP2]], label [[SHIFT_DONE:%.*]], label [[SHIFT_LOOP:%.*]]
16; CHECK:       shift.loop:
17; CHECK-NEXT:    [[TMP3:%.*]] = phi i8 [ [[TMP1]], [[TMP0:%.*]] ], [ [[TMP5:%.*]], [[SHIFT_LOOP]] ]
18; CHECK-NEXT:    [[TMP4:%.*]] = phi i32 [ [[VALUE:%.*]], [[TMP0]] ], [ [[TMP6:%.*]], [[SHIFT_LOOP]] ]
19; CHECK-NEXT:    [[TMP5]] = sub i8 [[TMP3]], 1
20; CHECK-NEXT:    [[TMP6]] = shl i32 [[TMP4]], 1
21; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i8 [[TMP5]], 0
22; CHECK-NEXT:    br i1 [[TMP7]], label [[SHIFT_DONE]], label [[SHIFT_LOOP]]
23; CHECK:       shift.done:
24; CHECK-NEXT:    [[TMP8:%.*]] = phi i32 [ [[VALUE]], [[TMP0]] ], [ [[TMP6]], [[SHIFT_LOOP]] ]
25; CHECK-NEXT:    ret i32 [[TMP8]]
26;
27  %result = shl i32 %value, %amount
28  ret i32 %result
29}
30
31define i32 @lshr(i32 %value, i32 %amount) addrspace(1) {
32; CHECK-LABEL: @lshr(
33; CHECK-NEXT:    [[TMP1:%.*]] = trunc i32 [[AMOUNT:%.*]] to i8
34; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i8 [[TMP1]], 0
35; CHECK-NEXT:    br i1 [[TMP2]], label [[SHIFT_DONE:%.*]], label [[SHIFT_LOOP:%.*]]
36; CHECK:       shift.loop:
37; CHECK-NEXT:    [[TMP3:%.*]] = phi i8 [ [[TMP1]], [[TMP0:%.*]] ], [ [[TMP5:%.*]], [[SHIFT_LOOP]] ]
38; CHECK-NEXT:    [[TMP4:%.*]] = phi i32 [ [[VALUE:%.*]], [[TMP0]] ], [ [[TMP6:%.*]], [[SHIFT_LOOP]] ]
39; CHECK-NEXT:    [[TMP5]] = sub i8 [[TMP3]], 1
40; CHECK-NEXT:    [[TMP6]] = lshr i32 [[TMP4]], 1
41; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i8 [[TMP5]], 0
42; CHECK-NEXT:    br i1 [[TMP7]], label [[SHIFT_DONE]], label [[SHIFT_LOOP]]
43; CHECK:       shift.done:
44; CHECK-NEXT:    [[TMP8:%.*]] = phi i32 [ [[VALUE]], [[TMP0]] ], [ [[TMP6]], [[SHIFT_LOOP]] ]
45; CHECK-NEXT:    ret i32 [[TMP8]]
46;
47  %result = lshr i32 %value, %amount
48  ret i32 %result
49}
50
51define i32 @ashr(i32 %0, i32 %1) addrspace(1) {
52; CHECK-LABEL: @ashr(
53; CHECK-NEXT:    [[TMP3:%.*]] = trunc i32 [[TMP1:%.*]] to i8
54; CHECK-NEXT:    [[TMP4:%.*]] = icmp eq i8 [[TMP3]], 0
55; CHECK-NEXT:    br i1 [[TMP4]], label [[SHIFT_DONE:%.*]], label [[SHIFT_LOOP:%.*]]
56; CHECK:       shift.loop:
57; CHECK-NEXT:    [[TMP5:%.*]] = phi i8 [ [[TMP3]], [[TMP2:%.*]] ], [ [[TMP7:%.*]], [[SHIFT_LOOP]] ]
58; CHECK-NEXT:    [[TMP6:%.*]] = phi i32 [ [[TMP0:%.*]], [[TMP2]] ], [ [[TMP8:%.*]], [[SHIFT_LOOP]] ]
59; CHECK-NEXT:    [[TMP7]] = sub i8 [[TMP5]], 1
60; CHECK-NEXT:    [[TMP8]] = ashr i32 [[TMP6]], 1
61; CHECK-NEXT:    [[TMP9:%.*]] = icmp eq i8 [[TMP7]], 0
62; CHECK-NEXT:    br i1 [[TMP9]], label [[SHIFT_DONE]], label [[SHIFT_LOOP]]
63; CHECK:       shift.done:
64; CHECK-NEXT:    [[TMP10:%.*]] = phi i32 [ [[TMP0]], [[TMP2]] ], [ [[TMP8]], [[SHIFT_LOOP]] ]
65; CHECK-NEXT:    ret i32 [[TMP10]]
66;
67  %3 = ashr i32 %0, %1
68  ret i32 %3
69}
70
71; This function is not modified because it is not an i32.
72define i40 @shl40(i40 %value, i40 %amount) addrspace(1) {
73; CHECK-LABEL: @shl40(
74; CHECK-NEXT:    [[RESULT:%.*]] = shl i40 [[VALUE:%.*]], [[AMOUNT:%.*]]
75; CHECK-NEXT:    ret i40 [[RESULT]]
76;
77  %result = shl i40 %value, %amount
78  ret i40 %result
79}
80
81; This function isn't either, although perhaps it should.
82define i24 @shl24(i24 %value, i24 %amount) addrspace(1) {
83; CHECK-LABEL: @shl24(
84; CHECK-NEXT:    [[RESULT:%.*]] = shl i24 [[VALUE:%.*]], [[AMOUNT:%.*]]
85; CHECK-NEXT:    ret i24 [[RESULT]]
86;
87  %result = shl i24 %value, %amount
88  ret i24 %result
89}
90