int_sideeffect.ll
570 Bytes
; RUN: opt -S < %s -licm | FileCheck %s
declare void @llvm.sideeffect()
; LICM across a @llvm.sideeffect.
; CHECK-LABEL: licm
; CHECK: load
; CHECK: loop:
; CHECK-NOT: load
define float @licm(i64 %n, float* nocapture readonly %p) #0 {
bb0:
br label %loop
loop:
%i = phi i64 [ 0, %bb0 ], [ %t5, %loop ]
%sum = phi float [ 0.000000e+00, %bb0 ], [ %t4, %loop ]
call void @llvm.sideeffect()
%t3 = load float, float* %p
%t4 = fadd float %sum, %t3
%t5 = add i64 %i, 1
%t6 = icmp ult i64 %t5, %n
br i1 %t6, label %loop, label %bb2
bb2:
ret float %t4
}