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
32
33
34
35
| ; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin9.6"
define i64 @foo(i64* nocapture %x, i64 %n) nounwind {
; CHECK-LABEL: Classifying expressions for: @foo
entry:
%t0 = icmp sgt i64 %n, 0
br i1 %t0, label %bb, label %return
bb:
%i.01 = phi i64 [ 0, %entry ], [ %indvar.next, %bb ]
%t1 = shl i64 %i.01, 7
%t2 = ashr i64 %t1, 7
; CHECK: %t2 = ashr i64 %t1, 7
; CHECK-NEXT: sext i57 {0,+,199}<%bb> to i64
; CHECK-SAME: Exits: (sext i57 (-199 + (trunc i64 %n to i57)) to i64)
; CHECK: %s2 = ashr i64 %s1, 5
; CHECK-NEXT: sext i59 {0,+,199}<%bb> to i64
; CHECK-SAME: Exits: (sext i59 (-199 + (trunc i64 %n to i59)) to i64)
%s1 = shl i64 %i.01, 5
%s2 = ashr i64 %s1, 5
%t3 = getelementptr i64, i64* %x, i64 %i.01
store i64 0, i64* %t3, align 1
%indvar.next = add i64 %i.01, 199
%exitcond = icmp eq i64 %indvar.next, %n
br i1 %exitcond, label %return, label %bb
return:
%p = phi i64 [ 0, %entry ], [ %t2, %bb ]
%q = phi i64 [ 0, %entry ], [ %s2, %bb ]
%v = xor i64 %p, %q
ret i64 %v
}
|