xref: /aosp_15_r20/external/llvm/test/CodeGen/AArch64/fast-isel-switch-phi.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58)
1*9880d681SAndroid Build Coastguard Worker; RUN: llc -mtriple=aarch64-apple-darwin -fast-isel -verify-machineinstrs < %s
2*9880d681SAndroid Build Coastguard Worker
3*9880d681SAndroid Build Coastguard Worker; Test that the Machine Instruction PHI node doesn't have more than one operand
4*9880d681SAndroid Build Coastguard Worker; from the same predecessor.
5*9880d681SAndroid Build Coastguard Workerdefine i32 @foo(i32 %a, i32 %b, i1 %c) {
6*9880d681SAndroid Build Coastguard Workerentry:
7*9880d681SAndroid Build Coastguard Worker  br i1 %c, label %switch, label %direct
8*9880d681SAndroid Build Coastguard Worker
9*9880d681SAndroid Build Coastguard Workerswitch:
10*9880d681SAndroid Build Coastguard Worker  switch i32 %a, label %exit [
11*9880d681SAndroid Build Coastguard Worker    i32 43, label %continue
12*9880d681SAndroid Build Coastguard Worker    i32 45, label %continue
13*9880d681SAndroid Build Coastguard Worker  ]
14*9880d681SAndroid Build Coastguard Worker
15*9880d681SAndroid Build Coastguard Workerdirect:
16*9880d681SAndroid Build Coastguard Worker  %var = add i32 %b, 1
17*9880d681SAndroid Build Coastguard Worker  br label %continue
18*9880d681SAndroid Build Coastguard Worker
19*9880d681SAndroid Build Coastguard Workercontinue:
20*9880d681SAndroid Build Coastguard Worker  %var.phi = phi i32 [ %var, %direct ], [ 0, %switch ], [ 0, %switch ]
21*9880d681SAndroid Build Coastguard Worker  ret i32 %var.phi
22*9880d681SAndroid Build Coastguard Worker
23*9880d681SAndroid Build Coastguard Workerexit:
24*9880d681SAndroid Build Coastguard Worker  ret i32 1
25*9880d681SAndroid Build Coastguard Worker}
26