xref: /aosp_15_r20/external/llvm/test/Transforms/LoopRotate/alloca.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58) 
1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -loop-rotate -S | FileCheck %s
2*9880d681SAndroid Build Coastguard Worker
3*9880d681SAndroid Build Coastguard Worker; Test alloca in -loop-rotate.
4*9880d681SAndroid Build Coastguard Worker
5*9880d681SAndroid Build Coastguard Worker; We expect a different value for %ptr each iteration (according to the
6*9880d681SAndroid Build Coastguard Worker; definition of alloca). I.e. each @use must be paired with an alloca.
7*9880d681SAndroid Build Coastguard Worker
8*9880d681SAndroid Build Coastguard Worker; CHECK: call void @use(i8* %
9*9880d681SAndroid Build Coastguard Worker; CHECK: %ptr = alloca i8
10*9880d681SAndroid Build Coastguard Worker
11*9880d681SAndroid Build Coastguard Worker@e = global i16 10
12*9880d681SAndroid Build Coastguard Worker
13*9880d681SAndroid Build Coastguard Workerdeclare void @use(i8*)
14*9880d681SAndroid Build Coastguard Worker
15*9880d681SAndroid Build Coastguard Workerdefine void @test() {
16*9880d681SAndroid Build Coastguard Workerentry:
17*9880d681SAndroid Build Coastguard Worker  %end = load i16, i16* @e
18*9880d681SAndroid Build Coastguard Worker  br label %loop
19*9880d681SAndroid Build Coastguard Worker
20*9880d681SAndroid Build Coastguard Workerloop:
21*9880d681SAndroid Build Coastguard Worker  %n.phi = phi i16 [ %n, %loop.fin ], [ 0, %entry ]
22*9880d681SAndroid Build Coastguard Worker  %ptr = alloca i8
23*9880d681SAndroid Build Coastguard Worker  %cond = icmp eq i16 %n.phi, %end
24*9880d681SAndroid Build Coastguard Worker  br i1 %cond, label %exit, label %loop.fin
25*9880d681SAndroid Build Coastguard Worker
26*9880d681SAndroid Build Coastguard Workerloop.fin:
27*9880d681SAndroid Build Coastguard Worker  %n = add i16 %n.phi, 1
28*9880d681SAndroid Build Coastguard Worker  call void @use(i8* %ptr)
29*9880d681SAndroid Build Coastguard Worker  br label %loop
30*9880d681SAndroid Build Coastguard Worker
31*9880d681SAndroid Build Coastguard Workerexit:
32*9880d681SAndroid Build Coastguard Worker  ret void
33*9880d681SAndroid Build Coastguard Worker}
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