1 ; Test for handling of asm constraints in MSan instrumentation.
2 ; RUN: opt < %s -msan-kernel=1 -msan-check-access-address=0 \
3 ; RUN: -msan-handle-asm-conservative=0 -S -passes=msan 2>&1 | FileCheck \
4 ; RUN: "-check-prefixes=CHECK,CHECK-NONCONS" %s
5 ; RUN: opt < %s -msan -msan-kernel=1 -msan-check-access-address=0 -msan-handle-asm-conservative=0 -S | FileCheck -check-prefixes=CHECK,CHECK-NONCONS %s
6 ; RUN: opt < %s -msan-kernel=1 -msan-check-access-address=0 \
7 ; RUN: -msan-handle-asm-conservative=1 -S -passes=msan 2>&1 | FileCheck \
8 ; RUN: "-check-prefixes=CHECK,CHECK-CONS" %s
9 ; RUN: opt < %s -msan -msan-kernel=1 -msan-check-access-address=0 -msan-handle-asm-conservative=1 -S | FileCheck -check-prefixes=CHECK,CHECK-CONS %s
11 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
12 target triple = "x86_64-unknown-linux-gnu"
14 %struct.pair = type { i32, i32 }
16 @id1 = common dso_local global i32 0, align 4
17 @is1 = common dso_local global i32 0, align 4
18 @id2 = common dso_local global i32 0, align 4
19 @is2 = common dso_local global i32 0, align 4
20 @id3 = common dso_local global i32 0, align 4
21 @pair2 = common dso_local global %struct.pair zeroinitializer, align 4
22 @pair1 = common dso_local global %struct.pair zeroinitializer, align 4
23 @c2 = common dso_local global i8 0, align 1
24 @c1 = common dso_local global i8 0, align 1
25 @memcpy_d1 = common dso_local global i8* (i8*, i8*, i32)* null, align 8
26 @memcpy_d2 = common dso_local global i8* (i8*, i8*, i32)* null, align 8
27 @memcpy_s1 = common dso_local global i8* (i8*, i8*, i32)* null, align 8
28 @memcpy_s2 = common dso_local global i8* (i8*, i8*, i32)* null, align 8
30 ; The functions below were generated from a C source that contains declarations like follows:
32 ; asm("" : "=r" (id1) : "r" (is1));
34 ; with corresponding input/output constraints.
35 ; Note that the assembly statement is always empty, as MSan doesn't look at it anyway.
37 ; One input register, one output register:
38 ; asm("" : "=r" (id1) : "r" (is1));
39 define dso_local void @f_1i_1o_reg() sanitize_memory {
41 %0 = load i32, i32* @is1, align 4
42 %1 = call i32 asm "", "=r,r,~{dirflag},~{fpsr},~{flags}"(i32 %0)
43 store i32 %1, i32* @id1, align 4
47 ; CHECK-LABEL: @f_1i_1o_reg
48 ; CHECK: [[IS1_F1:%.*]] = load i32, i32* @is1, align 4
49 ; CHECK: call void @__msan_warning
50 ; CHECK: call i32 asm "",{{.*}}(i32 [[IS1_F1]])
51 ; CHECK: [[PACK1_F1:%.*]] = call {{.*}} @__msan_metadata_ptr_for_store_4({{.*}}@id1{{.*}})
52 ; CHECK: [[EXT1_F1:%.*]] = extractvalue { i8*, i32* } [[PACK1_F1]], 0
53 ; CHECK: [[CAST1_F1:%.*]] = bitcast i8* [[EXT1_F1]] to i32*
54 ; CHECK: store i32 0, i32* [[CAST1_F1]]
57 ; Two input registers, two output registers:
58 ; asm("" : "=r" (id1), "=r" (id2) : "r" (is1), "r"(is2));
59 define dso_local void @f_2i_2o_reg() sanitize_memory {
61 %0 = load i32, i32* @is1, align 4
62 %1 = load i32, i32* @is2, align 4
63 %2 = call { i32, i32 } asm "", "=r,=r,r,r,~{dirflag},~{fpsr},~{flags}"(i32 %0, i32 %1)
64 %asmresult = extractvalue { i32, i32 } %2, 0
65 %asmresult1 = extractvalue { i32, i32 } %2, 1
66 store i32 %asmresult, i32* @id1, align 4
67 store i32 %asmresult1, i32* @id2, align 4
71 ; CHECK-LABEL: @f_2i_2o_reg
72 ; CHECK: [[IS1_F2:%.*]] = load i32, i32* @is1, align 4
73 ; CHECK: [[IS2_F2:%.*]] = load i32, i32* @is2, align 4
74 ; CHECK: call void @__msan_warning
75 ; CHECK: call void @__msan_warning
76 ; CHECK: call { i32, i32 } asm "",{{.*}}(i32 [[IS1_F2]], i32 [[IS2_F2]])
77 ; CHECK: [[PACK1_F2:%.*]] = call {{.*}} @__msan_metadata_ptr_for_store_4({{.*}}@id1{{.*}})
78 ; CHECK: [[EXT1_F2:%.*]] = extractvalue { i8*, i32* } [[PACK1_F2]], 0
79 ; CHECK: [[CAST1_F2:%.*]] = bitcast i8* [[EXT1_F2]] to i32*
80 ; CHECK: store i32 0, i32* [[CAST1_F2]]
81 ; CHECK: [[PACK2_F2:%.*]] = call {{.*}} @__msan_metadata_ptr_for_store_4({{.*}}@id2{{.*}})
82 ; CHECK: [[EXT2_F2:%.*]] = extractvalue { i8*, i32* } [[PACK2_F2]], 0
83 ; CHECK: [[CAST2_F2:%.*]] = bitcast i8* [[EXT2_F2]] to i32*
84 ; CHECK: store i32 0, i32* [[CAST2_F2]]
86 ; Input same as output, used twice:
87 ; asm("" : "=r" (id1), "=r" (id2) : "r" (id1), "r" (id2));
88 define dso_local void @f_2i_2o_reuse2_reg() sanitize_memory {
90 %0 = load i32, i32* @id1, align 4
91 %1 = load i32, i32* @id2, align 4
92 %2 = call { i32, i32 } asm "", "=r,=r,r,r,~{dirflag},~{fpsr},~{flags}"(i32 %0, i32 %1)
93 %asmresult = extractvalue { i32, i32 } %2, 0
94 %asmresult1 = extractvalue { i32, i32 } %2, 1
95 store i32 %asmresult, i32* @id1, align 4
96 store i32 %asmresult1, i32* @id2, align 4
100 ; CHECK-LABEL: @f_2i_2o_reuse2_reg
101 ; CHECK: [[ID1_F3:%.*]] = load i32, i32* @id1, align 4
102 ; CHECK: [[ID2_F3:%.*]] = load i32, i32* @id2, align 4
103 ; CHECK: call void @__msan_warning
104 ; CHECK: call void @__msan_warning
105 ; CHECK: call { i32, i32 } asm "",{{.*}}(i32 [[ID1_F3]], i32 [[ID2_F3]])
106 ; CHECK: [[PACK1_F3:%.*]] = call {{.*}} @__msan_metadata_ptr_for_store_4({{.*}}@id1{{.*}})
107 ; CHECK: [[EXT1_F3:%.*]] = extractvalue { i8*, i32* } [[PACK1_F3]], 0
108 ; CHECK: [[CAST1_F3:%.*]] = bitcast i8* [[EXT1_F3]] to i32*
109 ; CHECK: store i32 0, i32* [[CAST1_F3]]
110 ; CHECK: [[PACK2_F3:%.*]] = call {{.*}} @__msan_metadata_ptr_for_store_4({{.*}}@id2{{.*}})
111 ; CHECK: [[EXT2_F3:%.*]] = extractvalue { i8*, i32* } [[PACK2_F3]], 0
112 ; CHECK: [[CAST2_F3:%.*]] = bitcast i8* [[EXT2_F3]] to i32*
113 ; CHECK: store i32 0, i32* [[CAST2_F3]]
116 ; One of the input registers is also an output:
117 ; asm("" : "=r" (id1), "=r" (id2) : "r" (id1), "r"(is1));
118 define dso_local void @f_2i_2o_reuse1_reg() sanitize_memory {
120 %0 = load i32, i32* @id1, align 4
121 %1 = load i32, i32* @is1, align 4
122 %2 = call { i32, i32 } asm "", "=r,=r,r,r,~{dirflag},~{fpsr},~{flags}"(i32 %0, i32 %1)
123 %asmresult = extractvalue { i32, i32 } %2, 0
124 %asmresult1 = extractvalue { i32, i32 } %2, 1
125 store i32 %asmresult, i32* @id1, align 4
126 store i32 %asmresult1, i32* @id2, align 4
130 ; CHECK-LABEL: @f_2i_2o_reuse1_reg
131 ; CHECK: [[ID1_F4:%.*]] = load i32, i32* @id1, align 4
132 ; CHECK: [[IS1_F4:%.*]] = load i32, i32* @is1, align 4
133 ; CHECK: call void @__msan_warning
134 ; CHECK: call void @__msan_warning
135 ; CHECK: call { i32, i32 } asm "",{{.*}}(i32 [[ID1_F4]], i32 [[IS1_F4]])
136 ; CHECK: [[PACK1_F4:%.*]] = call {{.*}} @__msan_metadata_ptr_for_store_4({{.*}}@id1{{.*}})
137 ; CHECK: [[EXT1_F4:%.*]] = extractvalue { i8*, i32* } [[PACK1_F4]], 0
138 ; CHECK: [[CAST1_F4:%.*]] = bitcast i8* [[EXT1_F4]] to i32*
139 ; CHECK: store i32 0, i32* [[CAST1_F4]]
140 ; CHECK: [[PACK2_F4:%.*]] = call {{.*}} @__msan_metadata_ptr_for_store_4({{.*}}@id2{{.*}})
141 ; CHECK: [[EXT2_F4:%.*]] = extractvalue { i8*, i32* } [[PACK2_F4]], 0
142 ; CHECK: [[CAST2_F4:%.*]] = bitcast i8* [[EXT2_F4]] to i32*
143 ; CHECK: store i32 0, i32* [[CAST2_F4]]
146 ; One input register, three output registers:
147 ; asm("" : "=r" (id1), "=r" (id2), "=r" (id3) : "r" (is1));
148 define dso_local void @f_1i_3o_reg() sanitize_memory {
150 %0 = load i32, i32* @is1, align 4
151 %1 = call { i32, i32, i32 } asm "", "=r,=r,=r,r,~{dirflag},~{fpsr},~{flags}"(i32 %0)
152 %asmresult = extractvalue { i32, i32, i32 } %1, 0
153 %asmresult1 = extractvalue { i32, i32, i32 } %1, 1
154 %asmresult2 = extractvalue { i32, i32, i32 } %1, 2
155 store i32 %asmresult, i32* @id1, align 4
156 store i32 %asmresult1, i32* @id2, align 4
157 store i32 %asmresult2, i32* @id3, align 4
161 ; CHECK-LABEL: @f_1i_3o_reg
162 ; CHECK: [[IS1_F5:%.*]] = load i32, i32* @is1, align 4
163 ; CHECK: call void @__msan_warning
164 ; CHECK: call { i32, i32, i32 } asm "",{{.*}}(i32 [[IS1_F5]])
165 ; CHECK: [[PACK1_F5:%.*]] = call {{.*}} @__msan_metadata_ptr_for_store_4({{.*}}@id1{{.*}})
166 ; CHECK: [[EXT1_F5:%.*]] = extractvalue { i8*, i32* } [[PACK1_F5]], 0
167 ; CHECK: [[CAST1_F5:%.*]] = bitcast i8* [[EXT1_F5]] to i32*
168 ; CHECK: store i32 0, i32* [[CAST1_F5]]
169 ; CHECK: [[PACK2_F5:%.*]] = call {{.*}} @__msan_metadata_ptr_for_store_4({{.*}}@id2{{.*}})
170 ; CHECK: [[EXT2_F5:%.*]] = extractvalue { i8*, i32* } [[PACK2_F5]], 0
171 ; CHECK: [[CAST2_F5:%.*]] = bitcast i8* [[EXT2_F5]] to i32*
172 ; CHECK: store i32 0, i32* [[CAST2_F5]]
173 ; CHECK: [[PACK3_F5:%.*]] = call {{.*}} @__msan_metadata_ptr_for_store_4({{.*}}@id3{{.*}})
174 ; CHECK: [[EXT3_F5:%.*]] = extractvalue { i8*, i32* } [[PACK3_F5]], 0
175 ; CHECK: [[CAST3_F5:%.*]] = bitcast i8* [[EXT3_F5]] to i32*
176 ; CHECK: store i32 0, i32* [[CAST3_F5]]
179 ; 2 input memory args, 2 output memory args:
180 ; asm("" : "=m" (id1), "=m" (id2) : "m" (is1), "m"(is2))
181 define dso_local void @f_2i_2o_mem() sanitize_memory {
183 call void asm "", "=*m,=*m,*m,*m,~{dirflag},~{fpsr},~{flags}"(i32* @id1, i32* @id2, i32* @is1, i32* @is2)
187 ; CHECK-LABEL: @f_2i_2o_mem
188 ; CHECK-CONS: call void @__msan_instrument_asm_store({{.*}}@id1{{.*}}, i64 4)
189 ; CHECK-CONS: call void @__msan_instrument_asm_store({{.*}}@id2{{.*}}, i64 4)
190 ; CHECK: call void asm "", "=*m,=*m,*m,*m,~{dirflag},~{fpsr},~{flags}"(i32* @id1, i32* @id2, i32* @is1, i32* @is2)
193 ; Same input and output passed as both memory and register:
194 ; asm("" : "=r" (id1), "=m"(id1) : "r"(is1), "m"(is1));
195 define dso_local void @f_1i_1o_memreg() sanitize_memory {
197 %0 = load i32, i32* @is1, align 4
198 %1 = call i32 asm "", "=r,=*m,r,*m,~{dirflag},~{fpsr},~{flags}"(i32* @id1, i32 %0, i32* @is1)
199 store i32 %1, i32* @id1, align 4
203 ; CHECK-LABEL: @f_1i_1o_memreg
204 ; CHECK: [[IS1_F7:%.*]] = load i32, i32* @is1, align 4
205 ; CHECK-CONS: call void @__msan_instrument_asm_store({{.*}}@id1{{.*}}, i64 4)
206 ; CHECK: call void @__msan_warning
207 ; CHECK: call i32 asm "", "=r,=*m,r,*m,~{dirflag},~{fpsr},~{flags}"(i32* @id1, i32 [[IS1_F7]], i32* @is1)
210 ; Three outputs, first and last returned via regs, second via mem:
211 ; asm("" : "=r" (id1), "=m"(id2), "=r" (id3):);
212 define dso_local void @f_3o_reg_mem_reg() sanitize_memory {
214 %0 = call { i32, i32 } asm "", "=r,=*m,=r,~{dirflag},~{fpsr},~{flags}"(i32* @id2)
215 %asmresult = extractvalue { i32, i32 } %0, 0
216 %asmresult1 = extractvalue { i32, i32 } %0, 1
217 store i32 %asmresult, i32* @id1, align 4
218 store i32 %asmresult1, i32* @id3, align 4
222 ; CHECK-LABEL: @f_3o_reg_mem_reg
223 ; CHECK-CONS: call void @__msan_instrument_asm_store({{.*}}@id2{{.*}}), i64 4)
224 ; CHECK: call { i32, i32 } asm "", "=r,=*m,=r,~{dirflag},~{fpsr},~{flags}"(i32* @id2)
227 ; Three inputs and three outputs of different types: a pair, a char, a function pointer.
228 ; Everything is meant to be passed in registers, but LLVM chooses to return the integer pair by pointer:
229 ; asm("" : "=r" (pair2), "=r" (c2), "=r" (memcpy_d1) : "r"(pair1), "r"(c1), "r"(memcpy_s1));
230 define dso_local void @f_3i_3o_complex_reg() sanitize_memory {
232 %0 = load i64, i64* bitcast (%struct.pair* @pair1 to i64*), align 4
233 %1 = load i8, i8* @c1, align 1
234 %2 = load i8* (i8*, i8*, i32)*, i8* (i8*, i8*, i32)** @memcpy_s1, align 8
235 %3 = call { i8, i8* (i8*, i8*, i32)* } asm "", "=*r,=r,=r,r,r,r,~{dirflag},~{fpsr},~{flags}"(%struct.pair* @pair2, i64 %0, i8 %1, i8* (i8*, i8*, i32)* %2)
236 %asmresult = extractvalue { i8, i8* (i8*, i8*, i32)* } %3, 0
237 %asmresult1 = extractvalue { i8, i8* (i8*, i8*, i32)* } %3, 1
238 store i8 %asmresult, i8* @c2, align 1
239 store i8* (i8*, i8*, i32)* %asmresult1, i8* (i8*, i8*, i32)** @memcpy_d1, align 8
243 ; CHECK-LABEL: @f_3i_3o_complex_reg
244 ; CHECK: [[PAIR1_F9:%.*]] = load {{.*}} @pair1
245 ; CHECK: [[C1_F9:%.*]] = load {{.*}} @c1
246 ; CHECK: [[MEMCPY_S1_F9:%.*]] = load {{.*}} @memcpy_s1
247 ; CHECK-CONS: call void @__msan_instrument_asm_store({{.*}}@pair2{{.*}}, i64 8)
248 ; CHECK: call void @__msan_warning
249 ; CHECK: call void @__msan_warning
250 ; CHECK: call void @__msan_warning
251 ; CHECK: call { i8, i8* (i8*, i8*, i32)* } asm "", "=*r,=r,=r,r,r,r,~{dirflag},~{fpsr},~{flags}"(%struct.pair* @pair2, {{.*}}[[PAIR1_F9]], i8 [[C1_F9]], {{.*}} [[MEMCPY_S1_F9]])
253 ; Three inputs and three outputs of different types: a pair, a char, a function pointer.
254 ; Everything is passed in memory:
255 ; asm("" : "=m" (pair2), "=m" (c2), "=m" (memcpy_d1) : "m"(pair1), "m"(c1), "m"(memcpy_s1));
256 define dso_local void @f_3i_3o_complex_mem() sanitize_memory {
258 call void asm "", "=*m,=*m,=*m,*m,*m,*m,~{dirflag},~{fpsr},~{flags}"(%struct.pair* @pair2, i8* @c2, i8* (i8*, i8*, i32)** @memcpy_d1, %struct.pair* @pair1, i8* @c1, i8* (i8*, i8*, i32)** @memcpy_s1)
262 ; CHECK-LABEL: @f_3i_3o_complex_mem
263 ; CHECK-CONS: call void @__msan_instrument_asm_store({{.*}}@pair2{{.*}}, i64 8)
264 ; CHECK-CONS: call void @__msan_instrument_asm_store({{.*}}@c2{{.*}}, i64 1)
265 ; CHECK-CONS: call void @__msan_instrument_asm_store({{.*}}@memcpy_d1{{.*}}, i64 8)
266 ; CHECK: call void asm "", "=*m,=*m,=*m,*m,*m,*m,~{dirflag},~{fpsr},~{flags}"(%struct.pair* @pair2, i8* @c2, i8* (i8*, i8*, i32)** @memcpy_d1, %struct.pair* @pair1, i8* @c1, i8* (i8*, i8*, i32)** @memcpy_s1)
269 ; A simple asm goto construct to check that callbr is handled correctly:
270 ; int asm_goto(int n) {
272 ; asm goto("cmp %0, %1; jnz %l2;" :: "r"(n), "r"(v)::skip_label);
277 ; asm goto statements can't have outputs, so just make sure we check the input
278 ; and the compiler doesn't crash.
279 define dso_local i32 @asm_goto(i32 %n) sanitize_memory {
281 callbr void asm sideeffect "cmp $0, $1; jnz ${2:l}", "r,r,X,~{dirflag},~{fpsr},~{flags}"(i32 %n, i32 1, i8* blockaddress(@asm_goto, %skip_label))
282 to label %cleanup [label %skip_label]
284 skip_label: ; preds = %entry
287 cleanup: ; preds = %entry, %skip_label
288 %retval.0 = phi i32 [ 2, %skip_label ], [ 1, %entry ]
292 ; CHECK-LABEL: @asm_goto
293 ; CHECK: [[LOAD_ARG:%.*]] = load {{.*}} %_msarg
294 ; CHECK: [[CMP:%.*]] = icmp ne {{.*}} [[LOAD_ARG]], 0
295 ; CHECK: br {{.*}} [[CMP]], label %[[LABEL:.*]], label
297 ; CHECK-NEXT: call void @__msan_warning