1 ; RUN: llc -mtriple=aarch64-none-linux-gnu < %s | FileCheck %s --check-prefix=CHECK
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 {{w[0-9]+}}, {{w[0-9]+}}, #3, #4
13 %f.coerce.fca.0.extract = extractvalue [1 x i64] %f.coerce, 0
14 %tmp.sroa.0.0.extract.trunc = trunc i64 %f.coerce.fca.0.extract to i32
15 %bf.value = shl i32 %n, 3
16 %0 = and i32 %bf.value, 120
17 %f.sroa.0.0.insert.ext.masked = and i32 %tmp.sroa.0.0.extract.trunc, 135
18 %1 = or i32 %f.sroa.0.0.insert.ext.masked, %0
19 %f.sroa.0.0.extract.trunc = zext i32 %1 to i64
20 %tmp1.sroa.1.1.insert.insert = and i64 %f.coerce.fca.0.extract, 4294967040
21 %tmp1.sroa.0.0.insert.insert = or i64 %f.sroa.0.0.extract.trunc, %tmp1.sroa.1.1.insert.insert
22 %.fca.0.insert = insertvalue [1 x i64] undef, i64 %tmp1.sroa.0.0.insert.insert, 0
23 ret [1 x i64] %.fca.0.insert
26 define void @test_whole32(i32* %existing, i32* %new) {
27 ; 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:
67 ; CHECK: bfxil {{x[0-9]+}}, {{x[0-9]+}}, #0, #16
71 %oldval = load volatile i64* %existing
72 %oldval_keep = and i64 %oldval, 4294901760 ; = 0xffff0000
74 %newval = load volatile i64* %new
75 %newval_masked = and i64 %newval, 65535 ; = 0xffff
77 %combined = or i64 %oldval_keep, %newval_masked
78 store volatile i64 %combined, i64* %existing
83 define void @test_32bit_masked(i32 *%existing, i32 *%new) {
84 ; CHECK-LABEL: test_32bit_masked:
87 ; CHECK: bfi [[INSERT:w[0-9]+]], {{w[0-9]+}}, #3, #4
89 %oldval = load volatile i32* %existing
90 %oldval_keep = and i32 %oldval, 135 ; = 0x87
92 %newval = load volatile i32* %new
93 %newval_shifted = shl i32 %newval, 3
94 %newval_masked = and i32 %newval_shifted, 120 ; = 0x78
96 %combined = or i32 %oldval_keep, %newval_masked
97 store volatile i32 %combined, i32* %existing
102 define void @test_64bit_masked(i64 *%existing, i64 *%new) {
103 ; CHECK-LABEL: test_64bit_masked:
105 ; CHECK: bfi [[INSERT:x[0-9]+]], {{x[0-9]+}}, #40, #8
107 %oldval = load volatile i64* %existing
108 %oldval_keep = and i64 %oldval, 1095216660480 ; = 0xff_0000_0000
110 %newval = load volatile i64* %new
111 %newval_shifted = shl i64 %newval, 40
112 %newval_masked = and i64 %newval_shifted, 280375465082880 ; = 0xff00_0000_0000
114 %combined = or i64 %newval_masked, %oldval_keep
115 store volatile i64 %combined, i64* %existing
120 ; Mask is too complicated for literal ANDwwi, make sure other avenues are tried.
121 define void @test_32bit_complexmask(i32 *%existing, i32 *%new) {
122 ; CHECK-LABEL: test_32bit_complexmask:
125 ; CHECK: bfi {{w[0-9]+}}, {{w[0-9]+}}, #3, #4
127 %oldval = load volatile i32* %existing
128 %oldval_keep = and i32 %oldval, 647 ; = 0x287
130 %newval = load volatile i32* %new
131 %newval_shifted = shl i32 %newval, 3
132 %newval_masked = and i32 %newval_shifted, 120 ; = 0x278
134 %combined = or i32 %oldval_keep, %newval_masked
135 store volatile i32 %combined, i32* %existing
140 ; Neither mask is is a contiguous set of 1s. BFI can't be used
141 define void @test_32bit_badmask(i32 *%existing, i32 *%new) {
142 ; CHECK-LABEL: test_32bit_badmask:
147 %oldval = load volatile i32* %existing
148 %oldval_keep = and i32 %oldval, 135 ; = 0x87
150 %newval = load volatile i32* %new
151 %newval_shifted = shl i32 %newval, 3
152 %newval_masked = and i32 %newval_shifted, 632 ; = 0x278
154 %combined = or i32 %oldval_keep, %newval_masked
155 store volatile i32 %combined, i32* %existing
161 define void @test_64bit_badmask(i64 *%existing, i64 *%new) {
162 ; CHECK-LABEL: test_64bit_badmask:
167 %oldval = load volatile i64* %existing
168 %oldval_keep = and i64 %oldval, 135 ; = 0x87
170 %newval = load volatile i64* %new
171 %newval_shifted = shl i64 %newval, 3
172 %newval_masked = and i64 %newval_shifted, 664 ; = 0x278
174 %combined = or i64 %oldval_keep, %newval_masked
175 store volatile i64 %combined, i64* %existing
180 ; Bitfield insert where there's a left-over shr needed at the beginning
181 ; (e.g. result of str.bf1 = str.bf2)
182 define void @test_32bit_with_shr(i32* %existing, i32* %new) {
183 ; CHECK-LABEL: test_32bit_with_shr:
185 %oldval = load volatile i32* %existing
186 %oldval_keep = and i32 %oldval, 2214592511 ; =0x83ffffff
188 %newval = load i32* %new
189 %newval_shifted = shl i32 %newval, 12
190 %newval_masked = and i32 %newval_shifted, 2080374784 ; = 0x7c000000
192 %combined = or i32 %oldval_keep, %newval_masked
193 store volatile i32 %combined, i32* %existing
194 ; CHECK: lsr [[BIT:w[0-9]+]], {{w[0-9]+}}, #14
195 ; CHECK: bfi {{w[0-9]+}}, [[BIT]], #26, #5