20 lines
672 B
LLVM
20 lines
672 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
|
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=core-avx-i -mattr=+rdseed | FileCheck %s
|
|
|
|
declare {i64, i32} @llvm.x86.rdseed.64()
|
|
|
|
define i32 @_rdseed64_step(i64* %random_val) {
|
|
; CHECK-LABEL: _rdseed64_step:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: rdseedq %rcx
|
|
; CHECK-NEXT: movl $1, %eax
|
|
; CHECK-NEXT: cmovael %ecx, %eax
|
|
; CHECK-NEXT: movq %rcx, (%rdi)
|
|
; CHECK-NEXT: retq
|
|
%call = call {i64, i32} @llvm.x86.rdseed.64()
|
|
%randval = extractvalue {i64, i32} %call, 0
|
|
store i64 %randval, i64* %random_val
|
|
%isvalid = extractvalue {i64, i32} %call, 1
|
|
ret i32 %isvalid
|
|
}
|