1 ; RUN: llc -mtriple=aarch64-none-linux-gnu < %s | FileCheck %s
3 ; First, a simple example from Clang. The registers could plausibly be
4 ; different, but probably won't be.
6 %struct.foo = type { i8, [2 x i8], i8 }
8 define [1 x i64] @from_clang([1 x i64] %f.coerce, i32 %n) nounwind readnone {
9 ; CHECK-LABEL: from_clang:
10 ; CHECK: bfi w0, w1, #3, #4
14 %f.coerce.fca.0.extract = extractvalue [1 x i64] %f.coerce, 0
15 %tmp.sroa.0.0.extract.trunc = trunc i64 %f.coerce.fca.0.extract to i32
16 %bf.value = shl i32 %n, 3
17 %0 = and i32 %bf.value, 120
18 %f.sroa.0.0.insert.ext.masked = and i32 %tmp.sroa.0.0.extract.trunc, 135
19 %1 = or i32 %f.sroa.0.0.insert.ext.masked, %0
20 %f.sroa.0.0.extract.trunc = zext i32 %1 to i64
21 %tmp1.sroa.1.1.insert.insert = and i64 %f.coerce.fca.0.extract, 4294967040
22 %tmp1.sroa.0.0.insert.insert = or i64 %f.sroa.0.0.extract.trunc, %tmp1.sroa.1.1.insert.insert
23 %.fca.0.insert = insertvalue [1 x i64] undef, i64 %tmp1.sroa.0.0.insert.insert, 0
24 ret [1 x i64] %.fca.0.insert
27 define void @test_whole32(i32* %existing, i32* %new) {
28 ; CHECK-LABEL: test_whole32:
29 ; CHECK: bfi {{w[0-9]+}}, {{w[0-9]+}}, #26, #5
31 %oldval = load volatile i32* %existing
32 %oldval_keep = and i32 %oldval, 2214592511 ; =0x83ffffff
34 %newval = load volatile i32* %new
35 %newval_shifted = shl i32 %newval, 26
36 %newval_masked = and i32 %newval_shifted, 2080374784 ; = 0x7c000000
38 %combined = or i32 %oldval_keep, %newval_masked
39 store volatile i32 %combined, i32* %existing
44 define void @test_whole64(i64* %existing, i64* %new) {
45 ; CHECK-LABEL: test_whole64:
46 ; CHECK: bfi {{x[0-9]+}}, {{x[0-9]+}}, #26, #14
50 %oldval = load volatile i64* %existing
51 %oldval_keep = and i64 %oldval, 18446742974265032703 ; = 0xffffff0003ffffffL
53 %newval = load volatile i64* %new
54 %newval_shifted = shl i64 %newval, 26
55 %newval_masked = and i64 %newval_shifted, 1099444518912 ; = 0xfffc000000
57 %combined = or i64 %oldval_keep, %newval_masked
58 store volatile i64 %combined, i64* %existing
63 define void @test_whole32_from64(i64* %existing, i64* %new) {
64 ; CHECK-LABEL: test_whole32_from64:
65 ; CHECK: bfi {{w[0-9]+}}, {{w[0-9]+}}, #{{0|16}}, #16
69 %oldval = load volatile i64* %existing
70 %oldval_keep = and i64 %oldval, 4294901760 ; = 0xffff0000
72 %newval = load volatile i64* %new
73 %newval_masked = and i64 %newval, 65535 ; = 0xffff
75 %combined = or i64 %oldval_keep, %newval_masked
76 store volatile i64 %combined, i64* %existing
81 define void @test_32bit_masked(i32 *%existing, i32 *%new) {
82 ; CHECK-LABEL: test_32bit_masked:
83 ; CHECK: bfi [[INSERT:w[0-9]+]], {{w[0-9]+}}, #3, #4
84 ; CHECK: and {{w[0-9]+}}, [[INSERT]], #0xff
86 %oldval = load volatile i32* %existing
87 %oldval_keep = and i32 %oldval, 135 ; = 0x87
89 %newval = load volatile i32* %new
90 %newval_shifted = shl i32 %newval, 3
91 %newval_masked = and i32 %newval_shifted, 120 ; = 0x78
93 %combined = or i32 %oldval_keep, %newval_masked
94 store volatile i32 %combined, i32* %existing
99 define void @test_64bit_masked(i64 *%existing, i64 *%new) {
100 ; CHECK-LABEL: test_64bit_masked:
101 ; CHECK: bfi [[INSERT:x[0-9]+]], {{x[0-9]+}}, #40, #8
102 ; CHECK: and {{x[0-9]+}}, [[INSERT]], #0xffff00000000
104 %oldval = load volatile i64* %existing
105 %oldval_keep = and i64 %oldval, 1095216660480 ; = 0xff_0000_0000
107 %newval = load volatile i64* %new
108 %newval_shifted = shl i64 %newval, 40
109 %newval_masked = and i64 %newval_shifted, 280375465082880 ; = 0xff00_0000_0000
111 %combined = or i64 %newval_masked, %oldval_keep
112 store volatile i64 %combined, i64* %existing
117 ; Mask is too complicated for literal ANDwwi, make sure other avenues are tried.
118 define void @test_32bit_complexmask(i32 *%existing, i32 *%new) {
119 ; CHECK-LABEL: test_32bit_complexmask:
120 ; CHECK: bfi {{w[0-9]+}}, {{w[0-9]+}}, #3, #4
121 ; CHECK: and {{w[0-9]+}}, {{w[0-9]+}}, {{w[0-9]+}}
123 %oldval = load volatile i32* %existing
124 %oldval_keep = and i32 %oldval, 647 ; = 0x287
126 %newval = load volatile i32* %new
127 %newval_shifted = shl i32 %newval, 3
128 %newval_masked = and i32 %newval_shifted, 120 ; = 0x278
130 %combined = or i32 %oldval_keep, %newval_masked
131 store volatile i32 %combined, i32* %existing
136 ; Neither mask is is a contiguous set of 1s. BFI can't be used
137 define void @test_32bit_badmask(i32 *%existing, i32 *%new) {
138 ; CHECK-LABEL: test_32bit_badmask:
142 %oldval = load volatile i32* %existing
143 %oldval_keep = and i32 %oldval, 135 ; = 0x87
145 %newval = load volatile i32* %new
146 %newval_shifted = shl i32 %newval, 3
147 %newval_masked = and i32 %newval_shifted, 632 ; = 0x278
149 %combined = or i32 %oldval_keep, %newval_masked
150 store volatile i32 %combined, i32* %existing
156 define void @test_64bit_badmask(i64 *%existing, i64 *%new) {
157 ; CHECK-LABEL: test_64bit_badmask:
161 %oldval = load volatile i64* %existing
162 %oldval_keep = and i64 %oldval, 135 ; = 0x87
164 %newval = load volatile i64* %new
165 %newval_shifted = shl i64 %newval, 3
166 %newval_masked = and i64 %newval_shifted, 664 ; = 0x278
168 %combined = or i64 %oldval_keep, %newval_masked
169 store volatile i64 %combined, i64* %existing
174 ; Bitfield insert where there's a left-over shr needed at the beginning
175 ; (e.g. result of str.bf1 = str.bf2)
176 define void @test_32bit_with_shr(i32* %existing, i32* %new) {
177 ; CHECK-LABEL: test_32bit_with_shr:
179 %oldval = load volatile i32* %existing
180 %oldval_keep = and i32 %oldval, 2214592511 ; =0x83ffffff
182 %newval = load i32* %new
183 %newval_shifted = shl i32 %newval, 12
184 %newval_masked = and i32 %newval_shifted, 2080374784 ; = 0x7c000000
186 %combined = or i32 %oldval_keep, %newval_masked
187 store volatile i32 %combined, i32* %existing
188 ; CHECK: lsr [[BIT:w[0-9]+]], {{w[0-9]+}}, #14
189 ; CHECK: bfi {{w[0-9]}}, [[BIT]], #26, #5