1 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=core-avx-i -mattr=+rdrnd | FileCheck %s
2 declare {i16, i32} @llvm.x86.rdrand.16()
3 declare {i32, i32} @llvm.x86.rdrand.32()
4 declare {i64, i32} @llvm.x86.rdrand.64()
6 define i32 @_rdrand16_step(i16* %random_val) {
7 %call = call {i16, i32} @llvm.x86.rdrand.16()
8 %randval = extractvalue {i16, i32} %call, 0
9 store i16 %randval, i16* %random_val
10 %isvalid = extractvalue {i16, i32} %call, 1
12 ; CHECK-LABEL: _rdrand16_step:
14 ; CHECK: movzwl %ax, %ecx
15 ; CHECK: movl $1, %eax
16 ; CHECK: cmovael %ecx, %eax
17 ; CHECK: movw %cx, (%r[[A0:di|cx]])
21 define i32 @_rdrand32_step(i32* %random_val) {
22 %call = call {i32, i32} @llvm.x86.rdrand.32()
23 %randval = extractvalue {i32, i32} %call, 0
24 store i32 %randval, i32* %random_val
25 %isvalid = extractvalue {i32, i32} %call, 1
27 ; CHECK-LABEL: _rdrand32_step:
28 ; CHECK: rdrandl %e[[T0:[a-z]+]]
29 ; CHECK: movl $1, %eax
30 ; CHECK: cmovael %e[[T0]], %eax
31 ; CHECK: movl %e[[T0]], (%r[[A0]])
35 define i32 @_rdrand64_step(i64* %random_val) {
36 %call = call {i64, i32} @llvm.x86.rdrand.64()
37 %randval = extractvalue {i64, i32} %call, 0
38 store i64 %randval, i64* %random_val
39 %isvalid = extractvalue {i64, i32} %call, 1
41 ; CHECK-LABEL: _rdrand64_step:
42 ; CHECK: rdrandq %r[[T1:[a-z]+]]
43 ; CHECK: movl $1, %eax
44 ; CHECK: cmovael %e[[T1]], %eax
45 ; CHECK: movq %r[[T1]], (%r[[A0]])
49 ; Check that MachineCSE doesn't eliminate duplicate rdrand instructions.
50 define i32 @CSE() nounwind {
51 %rand1 = tail call { i32, i32 } @llvm.x86.rdrand.32() nounwind
52 %v1 = extractvalue { i32, i32 } %rand1, 0
53 %rand2 = tail call { i32, i32 } @llvm.x86.rdrand.32() nounwind
54 %v2 = extractvalue { i32, i32 } %rand2, 0
55 %add = add i32 %v2, %v1
62 ; Check that MachineLICM doesn't hoist rdrand instructions.
63 define void @loop(i32* %p, i32 %n) nounwind {
65 %tobool1 = icmp eq i32 %n, 0
66 br i1 %tobool1, label %while.end, label %while.body
68 while.body: ; preds = %entry, %while.body
69 %p.addr.03 = phi i32* [ %incdec.ptr, %while.body ], [ %p, %entry ]
70 %n.addr.02 = phi i32 [ %dec, %while.body ], [ %n, %entry ]
71 %dec = add nsw i32 %n.addr.02, -1
72 %incdec.ptr = getelementptr inbounds i32, i32* %p.addr.03, i64 1
73 %rand = tail call { i32, i32 } @llvm.x86.rdrand.32() nounwind
74 %v1 = extractvalue { i32, i32 } %rand, 0
75 store i32 %v1, i32* %p.addr.03, align 4
76 %tobool = icmp eq i32 %dec, 0
77 br i1 %tobool, label %while.end, label %while.body
79 while.end: ; preds = %while.body, %entry
83 ; CHECK: This Inner Loop Header: Depth=1