1 ; RUN: llc -mtriple=aarch64-none-linux-gnu < %s | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-AARCH64
2 ; RUN: llc -mtriple=arm64-none-linux-gnu < %s | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-ARM64
4 ; First, a simple example from Clang. The registers could plausibly be
5 ; different, but probably won't be.
7 %struct.foo = type { i8, [2 x i8], i8 }
9 define [1 x i64] @from_clang([1 x i64] %f.coerce, i32 %n) nounwind readnone {
10 ; CHECK-LABEL: from_clang:
11 ; CHECK: bfi {{w[0-9]+}}, {{w[0-9]+}}, #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:
30 ; CHECK: bfi {{w[0-9]+}}, {{w[0-9]+}}, #26, #5
32 %oldval = load volatile i32* %existing
33 %oldval_keep = and i32 %oldval, 2214592511 ; =0x83ffffff
35 %newval = load volatile i32* %new
36 %newval_shifted = shl i32 %newval, 26
37 %newval_masked = and i32 %newval_shifted, 2080374784 ; = 0x7c000000
39 %combined = or i32 %oldval_keep, %newval_masked
40 store volatile i32 %combined, i32* %existing
45 define void @test_whole64(i64* %existing, i64* %new) {
46 ; CHECK-LABEL: test_whole64:
47 ; CHECK: bfi {{x[0-9]+}}, {{x[0-9]+}}, #26, #14
51 %oldval = load volatile i64* %existing
52 %oldval_keep = and i64 %oldval, 18446742974265032703 ; = 0xffffff0003ffffffL
54 %newval = load volatile i64* %new
55 %newval_shifted = shl i64 %newval, 26
56 %newval_masked = and i64 %newval_shifted, 1099444518912 ; = 0xfffc000000
58 %combined = or i64 %oldval_keep, %newval_masked
59 store volatile i64 %combined, i64* %existing
64 define void @test_whole32_from64(i64* %existing, i64* %new) {
65 ; CHECK-LABEL: test_whole32_from64:
67 ; CHECK-AARCH64: bfi {{w[0-9]+}}, {{w[0-9]+}}, #{{0|16}}, #16
68 ; CHECK-AARCH64-NOT: and
70 ; CHECK-ARM64: bfxil {{x[0-9]+}}, {{x[0-9]+}}, #0, #16
74 %oldval = load volatile i64* %existing
75 %oldval_keep = and i64 %oldval, 4294901760 ; = 0xffff0000
77 %newval = load volatile i64* %new
78 %newval_masked = and i64 %newval, 65535 ; = 0xffff
80 %combined = or i64 %oldval_keep, %newval_masked
81 store volatile i64 %combined, i64* %existing
86 define void @test_32bit_masked(i32 *%existing, i32 *%new) {
87 ; CHECK-LABEL: test_32bit_masked:
90 ; CHECK: bfi [[INSERT:w[0-9]+]], {{w[0-9]+}}, #3, #4
91 ; CHECK-AARCH64: and {{w[0-9]+}}, [[INSERT]], #0xff
93 %oldval = load volatile i32* %existing
94 %oldval_keep = and i32 %oldval, 135 ; = 0x87
96 %newval = load volatile i32* %new
97 %newval_shifted = shl i32 %newval, 3
98 %newval_masked = and i32 %newval_shifted, 120 ; = 0x78
100 %combined = or i32 %oldval_keep, %newval_masked
101 store volatile i32 %combined, i32* %existing
106 define void @test_64bit_masked(i64 *%existing, i64 *%new) {
107 ; CHECK-LABEL: test_64bit_masked:
109 ; CHECK: bfi [[INSERT:x[0-9]+]], {{x[0-9]+}}, #40, #8
110 ; CHECK-AARCH64: and {{x[0-9]+}}, [[INSERT]], #0xffff00000000
112 %oldval = load volatile i64* %existing
113 %oldval_keep = and i64 %oldval, 1095216660480 ; = 0xff_0000_0000
115 %newval = load volatile i64* %new
116 %newval_shifted = shl i64 %newval, 40
117 %newval_masked = and i64 %newval_shifted, 280375465082880 ; = 0xff00_0000_0000
119 %combined = or i64 %newval_masked, %oldval_keep
120 store volatile i64 %combined, i64* %existing
125 ; Mask is too complicated for literal ANDwwi, make sure other avenues are tried.
126 define void @test_32bit_complexmask(i32 *%existing, i32 *%new) {
127 ; CHECK-LABEL: test_32bit_complexmask:
130 ; CHECK: bfi {{w[0-9]+}}, {{w[0-9]+}}, #3, #4
131 ; CHECK-AARCH64: and {{w[0-9]+}}, {{w[0-9]+}}, {{w[0-9]+}}
133 %oldval = load volatile i32* %existing
134 %oldval_keep = and i32 %oldval, 647 ; = 0x287
136 %newval = load volatile i32* %new
137 %newval_shifted = shl i32 %newval, 3
138 %newval_masked = and i32 %newval_shifted, 120 ; = 0x278
140 %combined = or i32 %oldval_keep, %newval_masked
141 store volatile i32 %combined, i32* %existing
146 ; Neither mask is is a contiguous set of 1s. BFI can't be used
147 define void @test_32bit_badmask(i32 *%existing, i32 *%new) {
148 ; CHECK-LABEL: test_32bit_badmask:
153 %oldval = load volatile i32* %existing
154 %oldval_keep = and i32 %oldval, 135 ; = 0x87
156 %newval = load volatile i32* %new
157 %newval_shifted = shl i32 %newval, 3
158 %newval_masked = and i32 %newval_shifted, 632 ; = 0x278
160 %combined = or i32 %oldval_keep, %newval_masked
161 store volatile i32 %combined, i32* %existing
167 define void @test_64bit_badmask(i64 *%existing, i64 *%new) {
168 ; CHECK-LABEL: test_64bit_badmask:
173 %oldval = load volatile i64* %existing
174 %oldval_keep = and i64 %oldval, 135 ; = 0x87
176 %newval = load volatile i64* %new
177 %newval_shifted = shl i64 %newval, 3
178 %newval_masked = and i64 %newval_shifted, 664 ; = 0x278
180 %combined = or i64 %oldval_keep, %newval_masked
181 store volatile i64 %combined, i64* %existing
186 ; Bitfield insert where there's a left-over shr needed at the beginning
187 ; (e.g. result of str.bf1 = str.bf2)
188 define void @test_32bit_with_shr(i32* %existing, i32* %new) {
189 ; CHECK-LABEL: test_32bit_with_shr:
191 %oldval = load volatile i32* %existing
192 %oldval_keep = and i32 %oldval, 2214592511 ; =0x83ffffff
194 %newval = load i32* %new
195 %newval_shifted = shl i32 %newval, 12
196 %newval_masked = and i32 %newval_shifted, 2080374784 ; = 0x7c000000
198 %combined = or i32 %oldval_keep, %newval_masked
199 store volatile i32 %combined, i32* %existing
200 ; CHECK: lsr [[BIT:w[0-9]+]], {{w[0-9]+}}, #14
201 ; CHECK: bfi {{w[0-9]+}}, [[BIT]], #26, #5