1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
; RUN: llc -march=x86 < %s | FileCheck %s
; The comparison happens after the relevant use, so the stride can easily
; be changed. The comparison can be done in a narrower mode than the
; induction variable.
; TODO: By making the first store post-increment as well, the loop setup
; could be made simpler.
define void @foo() nounwind {
; CHECK-LABEL: foo:
; CHECK-NOT: ret
; CHECK: cmpl $10
; CHECK: ret
entry:
br label %loop
loop:
%indvar = phi i32 [ 0, %entry ], [ %i.2.0.us1534, %loop ] ; <i32> [#uses=1]
%i.2.0.us1534 = add i32 %indvar, 1 ; <i32> [#uses=3]
%tmp628.us1540 = shl i32 %i.2.0.us1534, 1 ; <i32> [#uses=1]
%tmp645646647.us1547 = sext i32 %tmp628.us1540 to i64 ; <i64> [#uses=1]
store i64 %tmp645646647.us1547, i64* null
%tmp611.us1535 = icmp eq i32 %i.2.0.us1534, 4 ; <i1> [#uses=2]
%tmp623.us1538 = select i1 %tmp611.us1535, i32 6, i32 0 ; <i32> [#uses=1]
store i32 %tmp623.us1538, i32* null
br i1 %tmp611.us1535, label %exit, label %loop
exit:
ret void
}
|
