1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
; LFTR should eliminate the need for the computation of i*i completely. It
; is only used to compute the exit value.
; RUN: opt < %s -indvars -dce -S | not grep mul
@A = external global i32 ; <i32*> [#uses=1]
define i32 @quadratic_setlt() {
entry:
br label %loop
loop: ; preds = %loop, %entry
%i = phi i32 [ 7, %entry ], [ %i.next, %loop ] ; <i32> [#uses=5]
%i.next = add i32 %i, 1 ; <i32> [#uses=1]
store i32 %i, i32* @A
%i2 = mul i32 %i, %i ; <i32> [#uses=1]
%c = icmp slt i32 %i2, 1000 ; <i1> [#uses=1]
br i1 %c, label %loop, label %loopexit
loopexit: ; preds = %loop
ret i32 %i
}
|
