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
36
37
38
39
|
; RUN: opt -S -loop-vectorize -force-vector-width=2 -force-vector-interleave=1 -mcpu=prescott < %s | 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-f80:32:32-n8:16:32-S128"
target triple = "i386-unknown-freebsd11.0"
@big = external global [0 x i32]
; PR18049
; We need to truncate the exit count to i32. This is legal because the
; arithmetic is signed (%inc is nsw).
; CHECK-LABEL: tripcount
; CHECK: trunc i64 %count to i32
define void @tripcount(i64 %count) {
entry:
%cmp6 = icmp sgt i64 %count, 0
br i1 %cmp6, label %for.body.preheader, label %for.end
for.body.preheader:
br label %for.body
for.body:
%i.07 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
%arrayidx = getelementptr inbounds [0 x i32]* @big, i32 0, i32 %i.07
%0 = load i32* %arrayidx, align 4
%neg = xor i32 %0, -1
store i32 %neg, i32* %arrayidx, align 4
%inc = add nsw i32 %i.07, 1
%conv = sext i32 %inc to i64
%cmp = icmp slt i64 %conv, %count
br i1 %cmp, label %for.body, label %for.end.loopexit
for.end.loopexit:
br label %for.end
for.end:
ret void
}
|
