forked from OSchip/llvm-project
86 lines
2.8 KiB
LLVM
86 lines
2.8 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=core-avx-i -mattr=+rdrand | FileCheck %s
|
|
declare {i16, i32} @llvm.x86.rdrand.16()
|
|
declare {i32, i32} @llvm.x86.rdrand.32()
|
|
declare {i64, i32} @llvm.x86.rdrand.64()
|
|
|
|
define i32 @_rdrand16_step(i16* %random_val) {
|
|
%call = call {i16, i32} @llvm.x86.rdrand.16()
|
|
%randval = extractvalue {i16, i32} %call, 0
|
|
store i16 %randval, i16* %random_val
|
|
%isvalid = extractvalue {i16, i32} %call, 1
|
|
ret i32 %isvalid
|
|
; CHECK-LABEL: _rdrand16_step:
|
|
; CHECK: rdrandw %ax
|
|
; CHECK: movw %ax, (%r[[A0:di|cx]])
|
|
; CHECK: movzwl %ax, %ecx
|
|
; CHECK: movl $1, %eax
|
|
; CHECK: cmovael %ecx, %eax
|
|
; CHECK: ret
|
|
}
|
|
|
|
define i32 @_rdrand32_step(i32* %random_val) {
|
|
%call = call {i32, i32} @llvm.x86.rdrand.32()
|
|
%randval = extractvalue {i32, i32} %call, 0
|
|
store i32 %randval, i32* %random_val
|
|
%isvalid = extractvalue {i32, i32} %call, 1
|
|
ret i32 %isvalid
|
|
; CHECK-LABEL: _rdrand32_step:
|
|
; CHECK: rdrandl %e[[T0:[a-z]+]]
|
|
; CHECK: movl %e[[T0]], (%r[[A0]])
|
|
; CHECK: movl $1, %eax
|
|
; CHECK: cmovael %e[[T0]], %eax
|
|
; CHECK: ret
|
|
}
|
|
|
|
define i32 @_rdrand64_step(i64* %random_val) {
|
|
%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
|
|
; CHECK-LABEL: _rdrand64_step:
|
|
; CHECK: rdrandq %r[[T1:[a-z]+]]
|
|
; CHECK: movq %r[[T1]], (%r[[A0]])
|
|
; CHECK: movl $1, %eax
|
|
; CHECK: cmovael %e[[T1]], %eax
|
|
; CHECK: ret
|
|
}
|
|
|
|
; Check that MachineCSE doesn't eliminate duplicate rdrand instructions.
|
|
define i32 @CSE() nounwind {
|
|
%rand1 = tail call { i32, i32 } @llvm.x86.rdrand.32() nounwind
|
|
%v1 = extractvalue { i32, i32 } %rand1, 0
|
|
%rand2 = tail call { i32, i32 } @llvm.x86.rdrand.32() nounwind
|
|
%v2 = extractvalue { i32, i32 } %rand2, 0
|
|
%add = add i32 %v2, %v1
|
|
ret i32 %add
|
|
; CHECK-LABEL: CSE:
|
|
; CHECK: rdrandl
|
|
; CHECK: rdrandl
|
|
}
|
|
|
|
; Check that MachineLICM doesn't hoist rdrand instructions.
|
|
define void @loop(i32* %p, i32 %n) nounwind {
|
|
entry:
|
|
%tobool1 = icmp eq i32 %n, 0
|
|
br i1 %tobool1, label %while.end, label %while.body
|
|
|
|
while.body: ; preds = %entry, %while.body
|
|
%p.addr.03 = phi i32* [ %incdec.ptr, %while.body ], [ %p, %entry ]
|
|
%n.addr.02 = phi i32 [ %dec, %while.body ], [ %n, %entry ]
|
|
%dec = add nsw i32 %n.addr.02, -1
|
|
%incdec.ptr = getelementptr inbounds i32* %p.addr.03, i64 1
|
|
%rand = tail call { i32, i32 } @llvm.x86.rdrand.32() nounwind
|
|
%v1 = extractvalue { i32, i32 } %rand, 0
|
|
store i32 %v1, i32* %p.addr.03, align 4
|
|
%tobool = icmp eq i32 %dec, 0
|
|
br i1 %tobool, label %while.end, label %while.body
|
|
|
|
while.end: ; preds = %while.body, %entry
|
|
ret void
|
|
; CHECK-LABEL: loop:
|
|
; CHECK-NOT: rdrandl
|
|
; CHECK: This Inner Loop Header: Depth=1
|
|
; CHECK: rdrandl
|
|
}
|