1 ; RUN: opt -S -passes=rewrite-statepoints-for-gc < %s | FileCheck %s
3 target datalayout = "e-ni:1:6"
5 ; constants don't get relocated.
6 @G = addrspace(1) global i8 5
10 define i8 @test() gc "statepoint-example" {
12 ; CHECK: gc.statepoint
13 ; CHECK-NEXT: load i8, ptr addrspace(1) inttoptr (i64 15 to ptr addrspace(1))
14 ; Mostly just here to show reasonable code test can come from.
16 call void @foo() [ "deopt"() ]
17 %res = load i8, ptr addrspace(1) inttoptr (i64 15 to ptr addrspace(1))
21 define i8 @test2(ptr addrspace(1) %p) gc "statepoint-example" {
23 ; CHECK: gc.statepoint
24 ; CHECK-NEXT: gc.relocate
26 ; Globals don't move and thus don't get relocated
28 call void @foo() [ "deopt"() ]
29 %cmp = icmp eq ptr addrspace(1) %p, null
30 br i1 %cmp, label %taken, label %not_taken
32 taken: ; preds = %not_taken, %entry
35 not_taken: ; preds = %entry
36 %cmp2 = icmp ne ptr addrspace(1) %p, null
37 br i1 %cmp2, label %taken, label %dead
39 dead: ; preds = %not_taken
40 %addr = getelementptr i8, ptr addrspace(1) %p, i32 15
41 %res = load i8, ptr addrspace(1) %addr
45 define i8 @test3(i1 %always_true) gc "statepoint-example" {
47 ; CHECK: gc.statepoint
48 ; CHECK-NEXT: load i8, ptr addrspace(1) @G
50 call void @foo() [ "deopt"() ]
51 %res = load i8, ptr addrspace(1) @G, align 1
55 ; Even for source languages without constant references, we can
56 ; see constants can show up along paths where the value is dead.
57 ; This is particular relevant when computing bases of PHIs.
58 define ptr addrspace(1) @test4(ptr addrspace(1) %p) gc "statepoint-example" {
61 %is_null = icmp eq ptr addrspace(1) %p, null
62 br i1 %is_null, label %split, label %join
66 %arg_value_addr.i = getelementptr inbounds i8, ptr addrspace(1) %p, i64 8
71 ; CHECK: %addr2.base =
72 %addr2 = phi ptr addrspace(1) [ %arg_value_addr.i, %split ], [ inttoptr (i64 8 to ptr addrspace(1)), %entry ]
73 ;; NOTE: This particular example can be jump-threaded, but in general,
74 ;; we can't, and have to deal with the resulting IR.
75 br i1 %is_null, label %early-exit, label %use
78 ret ptr addrspace(1) null
82 ; CHECK: gc.statepoint
85 %res = load ptr addrspace(1), ptr addrspace(1) %addr2, align 1
86 ret ptr addrspace(1) %res
89 ; Globals don't move and thus don't get relocated
90 define ptr addrspace(1) @test5(i1 %always_true) gc "statepoint-example" {
92 ; CHECK: gc.statepoint
93 ; CHECK-NEXT: %res = extractelement <2 x ptr addrspace(1)> <ptr addrspace(1) @G, ptr addrspace(1) @G>, i32 0
96 %res = extractelement <2 x ptr addrspace(1)> <ptr addrspace(1) @G, ptr addrspace(1) @G>, i32 0
97 ret ptr addrspace(1) %res
100 define ptr addrspace(1) @test6(i64 %arg) gc "statepoint-example" {
102 ; Don't fail any assertions and don't record null as a live value
104 ; CHECK: gc.statepoint
105 ; CHECK-NOT: call {{.*}}gc.relocate
106 %load_addr = getelementptr i8, ptr addrspace(1) null, i64 %arg
107 call void @foo() [ "deopt"() ]
108 ret ptr addrspace(1) %load_addr
111 define ptr addrspace(1) @test7(i64 %arg) gc "statepoint-example" {
113 ; Same as test7 but use regular constant instead of a null
115 ; CHECK: gc.statepoint
116 ; CHECK-NOT: call {{.*}}gc.relocate
117 %load_addr = getelementptr i8, ptr addrspace(1) inttoptr (i64 15 to ptr addrspace(1)), i64 %arg
118 call void @foo() [ "deopt"() ]
119 ret ptr addrspace(1) %load_addr
122 define i8 @test8(ptr addrspace(1) %p) gc "statepoint-example" {
123 ; Checks that base( phi(gep null, oop) ) = phi(null, base(oop)) and that we
124 ; correctly relocate this value
125 ; CHECK-LABEL: @test8
127 %is_null = icmp eq ptr addrspace(1) %p, null
128 br i1 %is_null, label %null.crit-edge, label %not-null
131 %load_addr = getelementptr inbounds i8, ptr addrspace(1) %p, i64 8
135 %load_addr.const = getelementptr inbounds i8, ptr addrspace(1) null, i64 8
139 %addr = phi ptr addrspace(1) [ %load_addr, %not-null ], [%load_addr.const, %null.crit-edge]
140 ; CHECK: %addr.base = phi ptr addrspace(1)
141 ; CHECK-DAG: [ %p, %not-null ]
142 ; CHECK-DAG: [ null, %null.crit-edge ]
143 ; CHECK: gc.statepoint
144 call void @foo() [ "deopt"() ]
145 ; CHECK-DAG: call {{.*}}gc.relocate{{.*}}(%addr.base, %addr.base)
146 ; CHECK-DAG: call {{.*}}gc.relocate{{.*}}(%addr.base, %addr)
147 br i1 %is_null, label %early-exit, label %use
153 %res = load i8, ptr addrspace(1) %addr, align 1
157 define i8 @test9(ptr addrspace(1) %p) gc "statepoint-example" {
158 ; Checks that base( phi(inttoptr, oop) ) = phi(null, base(oop)) and that we
159 ; correctly relocate this value
160 ; CHECK-LABEL: @test9
162 %is_null = icmp eq ptr addrspace(1) %p, null
163 br i1 %is_null, label %null.crit-edge, label %not-null
166 %load_addr = getelementptr inbounds i8, ptr addrspace(1) %p, i64 8
173 %addr = phi ptr addrspace(1) [ %load_addr, %not-null ], [inttoptr (i64 8 to ptr addrspace(1)), %null.crit-edge]
174 ; CHECK: %addr.base = phi ptr addrspace(1)
175 ; CHECK-DAG: [ %p, %not-null ]
176 ; CHECK-DAG: [ null, %null.crit-edge ]
177 ; CHECK: gc.statepoint
178 call void @foo() [ "deopt"() ]
179 ; CHECK-DAG: call {{.*}}gc.relocate{{.*}}(%addr.base, %addr.base)
180 ; CHECK-DAG: call {{.*}}gc.relocate{{.*}}(%addr.base, %addr)
181 br i1 %is_null, label %early-exit, label %use
187 %res = load i8, ptr addrspace(1) %addr, align 1
191 define i8 @test10(ptr addrspace(1) %p) gc "statepoint-example" {
192 ; Checks that base( phi(const gep, oop) ) = phi(null, base(oop)) and that we
193 ; correctly relocate this value
194 ; CHECK-LABEL: @test10
196 %is_null = icmp eq ptr addrspace(1) %p, null
197 br i1 %is_null, label %null.crit-edge, label %not-null
200 %load_addr = getelementptr inbounds i8, ptr addrspace(1) %p, i64 8
207 %addr = phi ptr addrspace(1) [ %load_addr, %not-null ], [getelementptr (i8, ptr addrspace(1) null, i64 8), %null.crit-edge]
208 ; CHECK: %addr.base = phi ptr addrspace(1)
209 ; CHECK-DAG: [ %p, %not-null ]
210 ; CHECK-DAG: [ null, %null.crit-edge ]
211 ; CHECK: gc.statepoint
212 call void @foo() [ "deopt"() ]
213 ; CHECK-DAG: call {{.*}}gc.relocate{{.*}}(%addr.base, %addr.base)
214 ; CHECK-DAG: call {{.*}}gc.relocate{{.*}}(%addr.base, %addr)
215 br i1 %is_null, label %early-exit, label %use
221 %res = load i8, ptr addrspace(1) %addr, align 1
225 define ptr addrspace(1) @test11(i1 %c) gc "statepoint-example" {
226 ; CHECK-LABEL: @test11
227 ; Checks that base( select(const1, const2) ) == null and that we don't record
228 ; such value in the oop map
230 %val = select i1 %c, ptr addrspace(1) inttoptr (i64 8 to ptr addrspace(1)), ptr addrspace(1) inttoptr (i64 15 to ptr addrspace(1))
231 ; CHECK: gc.statepoint
232 ; CHECK-NOT: call {{.*}}gc.relocate
233 call void @foo() [ "deopt"() ]
234 ret ptr addrspace(1) %val
238 define <2 x ptr addrspace(1)> @test12(i1 %c) gc "statepoint-example" {
239 ; CHECK-LABEL: @test12
240 ; Same as test11 but with vectors
242 %val = select i1 %c, <2 x ptr addrspace(1)> <ptr addrspace(1) inttoptr (i64 5 to ptr addrspace(1)),
243 ptr addrspace(1) inttoptr (i64 15 to ptr addrspace(1))>,
244 <2 x ptr addrspace(1)> <ptr addrspace(1) inttoptr (i64 30 to ptr addrspace(1)),
245 ptr addrspace(1) inttoptr (i64 60 to ptr addrspace(1))>
246 ; CHECK: gc.statepoint
247 ; CHECK-NOT: call {{.*}}gc.relocate
248 call void @foo() [ "deopt"() ]
249 ret <2 x ptr addrspace(1)> %val
252 define <2 x ptr addrspace(1)> @test13(i1 %c, <2 x ptr addrspace(1)> %ptr) gc "statepoint-example" {
253 ; CHECK-LABEL: @test13
254 ; Similar to test8, test9 and test10 but with vectors
256 %val = select i1 %c, <2 x ptr addrspace(1)> %ptr,
257 <2 x ptr addrspace(1)> <ptr addrspace(1) inttoptr (i64 30 to ptr addrspace(1)), ptr addrspace(1) inttoptr (i64 60 to ptr addrspace(1))>
258 ; CHECK: %val.base = select i1 %c, <2 x ptr addrspace(1)> %ptr, <2 x ptr addrspace(1)> zeroinitializer, !is_base_value !0
259 ; CHECK: gc.statepoint
260 call void @foo() [ "deopt"() ]
261 ; CHECK-DAG: call {{.*}}gc.relocate{{.*}}(%val.base, %val.base)
262 ; CHECK-DAG: call {{.*}}gc.relocate{{.*}}(%val.base, %val)
263 ret <2 x ptr addrspace(1)> %val
266 define ptr addrspace(1) @test14() gc "statepoint-example" {
267 ; CHECK-LABEL: @test14
268 ; FIXME: this is a extract element of constant vector and as such should not be relocated, but our current code relocates it since the extractelement will conservatively be marked as conflict during the BDV insertion algorithm. In many cases the extra instruction will be identical to the one already present and will be removed by later phases.
270 %val = extractelement <2 x ptr addrspace(1)> <ptr addrspace(1) inttoptr (i64 5 to ptr addrspace(1)),
271 ptr addrspace(1) inttoptr (i64 15 to ptr addrspace(1))>, i32 0
272 ; CHECK: gc.statepoint
273 call void @foo() [ "deopt"() ]
274 ; CHECK-DAG: call {{.*}}gc.relocate{{.*}}(%val.base, %val.base)
275 ; CHECK-DAG: call {{.*}}gc.relocate{{.*}}(%val.base, %val)
276 ret ptr addrspace(1) %val