28 lines
570 B
LLVM
28 lines
570 B
LLVM
; 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
|
|
}
|