xref: /aosp_15_r20/external/llvm/test/CodeGen/AArch64/readcyclecounter.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58) 
1*9880d681SAndroid Build Coastguard Worker; RUN: llc -mtriple=aarch64-unknown-unknown -asm-verbose=false < %s |\
2*9880d681SAndroid Build Coastguard Worker; RUN:   FileCheck %s --check-prefix=CHECK --check-prefix=PERFMON
3*9880d681SAndroid Build Coastguard Worker; RUN: llc -mtriple=aarch64-unknown-unknown -mattr=-perfmon -asm-verbose=false < %s |\
4*9880d681SAndroid Build Coastguard Worker; RUN:   FileCheck %s --check-prefix=CHECK --check-prefix=NOPERFMON
5*9880d681SAndroid Build Coastguard Worker
6*9880d681SAndroid Build Coastguard Workerdefine i64 @test_readcyclecounter() nounwind {
7*9880d681SAndroid Build Coastguard Worker  ; CHECK-LABEL:   test_readcyclecounter:
8*9880d681SAndroid Build Coastguard Worker  ; PERFMON-NEXT:   mrs x0, PMCCNTR_EL0
9*9880d681SAndroid Build Coastguard Worker  ; NOPERFMON-NEXT: mov x0, xzr
10*9880d681SAndroid Build Coastguard Worker  ; CHECK-NEXT:     ret
11*9880d681SAndroid Build Coastguard Worker  %tmp0 = call i64 @llvm.readcyclecounter()
12*9880d681SAndroid Build Coastguard Worker  ret i64 %tmp0
13*9880d681SAndroid Build Coastguard Worker}
14*9880d681SAndroid Build Coastguard Worker
15*9880d681SAndroid Build Coastguard Workerdeclare i64 @llvm.readcyclecounter()
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