diff options
Diffstat (limited to 'test/CodeGen/X86/rdrand-x86_64.ll')
| -rw-r--r-- | test/CodeGen/X86/rdrand-x86_64.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test/CodeGen/X86/rdrand-x86_64.ll b/test/CodeGen/X86/rdrand-x86_64.ll new file mode 100644 index 0000000000000..06f1136087bbd --- /dev/null +++ b/test/CodeGen/X86/rdrand-x86_64.ll @@ -0,0 +1,19 @@ +; 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=+rdrnd | FileCheck %s + +declare {i64, i32} @llvm.x86.rdrand.64() + +define i32 @_rdrand64_step(i64* %random_val) { +; CHECK-LABEL: _rdrand64_step: +; CHECK: # BB#0: +; CHECK-NEXT: rdrandq %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.rdrand.64() + %randval = extractvalue {i64, i32} %call, 0 + store i64 %randval, i64* %random_val + %isvalid = extractvalue {i64, i32} %call, 1 + ret i32 %isvalid +} |