4b907414d2
The llvm.readcyclecounter intrinsic can be implemented via the STORE CLOCK FAST (STCKF) instruction.
28 lines
837 B
LLVM
28 lines
837 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
|
; RUN: llc < %s -mtriple=s390x-ibm-linux | FileCheck %s
|
|
|
|
; Verify that we correctly lower ISD::READCYCLECOUNTER.
|
|
|
|
define i64 @test_builtin_readcyclecounter1() {
|
|
; CHECK-LABEL: test_builtin_readcyclecounter1:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: aghi %r15, -168
|
|
; CHECK-NEXT: .cfi_def_cfa_offset 328
|
|
; CHECK-NEXT: stckf 160(%r15)
|
|
; CHECK-NEXT: lg %r2, 160(%r15)
|
|
; CHECK-NEXT: aghi %r15, 168
|
|
; CHECK-NEXT: br %r14
|
|
%1 = tail call i64 @llvm.readcyclecounter()
|
|
ret i64 %1
|
|
}
|
|
|
|
define void @test_builtin_readcyclecounter2(ptr %ptr) {
|
|
; CHECK-LABEL: test_builtin_readcyclecounter2:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: stckf 0(%r2)
|
|
; CHECK-NEXT: br %r14
|
|
%1 = tail call i64 @llvm.readcyclecounter()
|
|
store i64 %1, ptr %ptr
|
|
ret void
|
|
}
|