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