1 ; RUN: opt < %s -sroa -S | FileCheck %s
2 target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n8:16:32:64"
10 %a0 = getelementptr [2 x i32]* %a, i64 0, i32 0
11 %a1 = getelementptr [2 x i32]* %a, i64 0, i32 1
19 %cond = icmp sle i32 %v0, %v1
20 br i1 %cond, label %then, label %exit
26 %phi = phi i32* [ %a1, %then ], [ %a0, %entry ]
27 ; CHECK: phi i32 [ 1, %{{.*}} ], [ 0, %{{.*}} ]
29 %result = load i32* %phi
39 %a0 = getelementptr [2 x i32]* %a, i64 0, i32 0
40 %a1 = getelementptr [2 x i32]* %a, i64 0, i32 1
48 %cond = icmp sle i32 %v0, %v1
49 %select = select i1 %cond, i32* %a1, i32* %a0
50 ; CHECK: select i1 %{{.*}}, i32 1, i32 0
52 %result = load i32* %select
56 define i32 @test3(i32 %x) {
62 %a0 = getelementptr [2 x i32]* %a, i64 0, i32 0
63 %a1 = getelementptr [2 x i32]* %a, i64 0, i32 1
68 switch i32 %x, label %bb0 [ i32 1, label %bb1
82 %phi = phi i32* [ %a1, %bb0 ], [ %a0, %bb1 ], [ %a0, %bb2 ], [ %a1, %bb3 ]
83 ; CHECK: phi i32 [ 1, %{{.*}} ], [ 0, %{{.*}} ], [ 0, %{{.*}} ], [ 1, %{{.*}} ]
85 %result = load i32* %phi
95 %a0 = getelementptr [2 x i32]* %a, i64 0, i32 0
96 %a1 = getelementptr [2 x i32]* %a, i64 0, i32 1
104 %cond = icmp sle i32 %v0, %v1
105 %select = select i1 %cond, i32* %a0, i32* %a0
108 %result = load i32* %select
113 define i32 @test5(i32* %b) {
116 %a = alloca [2 x i32]
119 %a1 = getelementptr [2 x i32]* %a, i64 0, i32 1
120 store i32 1, i32* %a1
123 %select = select i1 true, i32* %a1, i32* %b
126 %result = load i32* %select
133 declare void @f(i32*, i32*)
135 define i32 @test6(i32* %b) {
138 %a = alloca [2 x i32]
142 %a1 = getelementptr [2 x i32]* %a, i64 0, i32 1
143 store i32 1, i32* %a1
145 %select = select i1 true, i32* %a1, i32* %b
146 %select2 = select i1 false, i32* %a1, i32* %b
147 %select3 = select i1 false, i32* %c, i32* %b
148 ; CHECK: %[[select2:.*]] = select i1 false, i32* undef, i32* %b
149 ; CHECK: %[[select3:.*]] = select i1 false, i32* undef, i32* %b
151 ; Note, this would potentially escape the alloca pointer except for the
152 ; constant folding of the select.
153 call void @f(i32* %select2, i32* %select3)
154 ; CHECK: call void @f(i32* %[[select2]], i32* %[[select3]])
157 %result = load i32* %select
166 define i32 @test7() {
172 br i1 undef, label %good, label %bad
175 %Y1 = getelementptr i32* %X, i64 0
176 store i32 0, i32* %Y1
180 %Y2 = getelementptr i32* %X, i64 1
181 store i32 0, i32* %Y2
185 %P = phi i32* [ %Y1, %good ], [ %Y2, %bad ]
186 ; CHECK: %[[phi:.*]] = phi i32 [ 0, %good ],
189 ; CHECK: ret i32 %[[phi]]
192 define i32 @test8(i32 %b, i32* %ptr) {
193 ; Ensure that we rewrite allocas to the used type when that use is hidden by
194 ; a PHI that can be speculated.
198 ; CHECK: %[[value:.*]] = load i32* %ptr
200 ; CHECK: %[[result:.*]] = phi i32 [ undef, %else ], [ %[[value]], %then ]
201 ; CHECK-NEXT: ret i32 %[[result]]
205 %test = icmp ne i32 %b, 0
206 br i1 %test, label %then, label %else
212 %bitcast = bitcast float* %f to i32*
216 %phi = phi i32* [ %bitcast, %else ], [ %ptr, %then ]
217 %loaded = load i32* %phi, align 4
221 define i32 @test9(i32 %b, i32* %ptr) {
222 ; Same as @test8 but for a select rather than a PHI node.
226 ; CHECK: %[[value:.*]] = load i32* %ptr
228 ; CHECK: %[[result:.*]] = select i1 %{{.*}}, i32 undef, i32 %[[value]]
229 ; CHECK-NEXT: ret i32 %[[result]]
233 store i32 0, i32* %ptr
234 %test = icmp ne i32 %b, 0
235 %bitcast = bitcast float* %f to i32*
236 %select = select i1 %test, i32* %bitcast, i32* %ptr
237 %loaded = load i32* %select, align 4
241 define i32 @test10(i32 %b, i32* %ptr) {
242 ; Don't try to promote allocas which are not elligible for it even after
243 ; rewriting due to the necessity of inserting bitcasts when speculating a PHI
246 ; CHECK: %[[alloca:.*]] = alloca
247 ; CHECK: %[[argvalue:.*]] = load i32* %ptr
248 ; CHECK: %[[cast:.*]] = bitcast double* %[[alloca]] to i32*
249 ; CHECK: %[[allocavalue:.*]] = load i32* %[[cast]]
250 ; CHECK: %[[result:.*]] = phi i32 [ %[[allocavalue]], %else ], [ %[[argvalue]], %then ]
251 ; CHECK-NEXT: ret i32 %[[result]]
255 store double 0.0, double* %f
256 %test = icmp ne i32 %b, 0
257 br i1 %test, label %then, label %else
263 %bitcast = bitcast double* %f to i32*
267 %phi = phi i32* [ %bitcast, %else ], [ %ptr, %then ]
268 %loaded = load i32* %phi, align 4
272 define i32 @test11(i32 %b, i32* %ptr) {
273 ; Same as @test10 but for a select rather than a PHI node.
275 ; CHECK: %[[alloca:.*]] = alloca
276 ; CHECK: %[[cast:.*]] = bitcast double* %[[alloca]] to i32*
277 ; CHECK: %[[allocavalue:.*]] = load i32* %[[cast]]
278 ; CHECK: %[[argvalue:.*]] = load i32* %ptr
279 ; CHECK: %[[result:.*]] = select i1 %{{.*}}, i32 %[[allocavalue]], i32 %[[argvalue]]
280 ; CHECK-NEXT: ret i32 %[[result]]
284 store double 0.0, double* %f
285 store i32 0, i32* %ptr
286 %test = icmp ne i32 %b, 0
287 %bitcast = bitcast double* %f to i32*
288 %select = select i1 %test, i32* %bitcast, i32* %ptr
289 %loaded = load i32* %select, align 4
293 define i32 @test12(i32 %x, i32* %p) {
294 ; Ensure we don't crash or fail to nuke dead selects of allocas if no load is
303 store i32 %x, i32* %a
304 %dead = select i1 undef, i32* %a, i32* %p
309 define i32 @test13(i32 %x, i32* %p) {
310 ; Ensure we don't crash or fail to nuke dead phis of allocas if no load is ever
319 store i32 %x, i32* %a
323 %phi = phi i32* [ %p, %entry ], [ %a, %loop ]
324 br i1 undef, label %loop, label %exit