1 ; RUN: opt -basic-aa -loop-idiom < %s -S | FileCheck %s
2 target datalayout = "e-p:64:64:64:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
4 ; CHECK: @.memset_pattern = private unnamed_addr constant [4 x i32] [i32 2, i32 2, i32 2, i32 2], align 16
6 target triple = "x86_64-apple-darwin10.0.0"
8 ;void test(int *f, unsigned n) {
9 ; for (unsigned i = 0; i < 2 * n; i += 2) {
14 define void @test(i32* %f, i32 %n) nounwind ssp {
17 %cmp1 = icmp eq i32 %0, 0
18 br i1 %cmp1, label %for.end, label %for.body.preheader
20 for.body.preheader: ; preds = %entry
23 for.body: ; preds = %for.body.preheader, %for.body
24 %indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
25 %arrayidx = getelementptr inbounds i32, i32* %f, i32 %indvars.iv
26 store i32 0, i32* %arrayidx, align 4
27 %1 = or i32 %indvars.iv, 1
28 %arrayidx2 = getelementptr inbounds i32, i32* %f, i32 %1
29 store i32 0, i32* %arrayidx2, align 4
30 %indvars.iv.next = add nuw nsw i32 %indvars.iv, 2
31 %cmp = icmp ult i32 %indvars.iv.next, %0
32 br i1 %cmp, label %for.body, label %for.end.loopexit
34 for.end.loopexit: ; preds = %for.body
37 for.end: ; preds = %for.end.loopexit, %entry
40 ; CHECK: call void @llvm.memset
44 ;void test_pattern(int *f, unsigned n) {
45 ; for (unsigned i = 0; i < 2 * n; i += 2) {
50 define void @test_pattern(i32* %f, i32 %n) nounwind ssp {
53 %cmp1 = icmp eq i32 %mul, 0
54 br i1 %cmp1, label %for.end, label %for.body.preheader
56 for.body.preheader: ; preds = %entry
59 for.body: ; preds = %for.body.preheader, %for.body
60 %indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
61 %arrayidx = getelementptr inbounds i32, i32* %f, i32 %indvars.iv
62 store i32 2, i32* %arrayidx, align 4
63 %x1 = or i32 %indvars.iv, 1
64 %arrayidx2 = getelementptr inbounds i32, i32* %f, i32 %x1
65 store i32 2, i32* %arrayidx2, align 4
66 %indvars.iv.next = add nuw nsw i32 %indvars.iv, 2
67 %cmp = icmp ult i32 %indvars.iv.next, %mul
68 br i1 %cmp, label %for.body, label %for.end.loopexit
70 for.end.loopexit: ; preds = %for.body
73 for.end: ; preds = %for.end.loopexit, %entry
75 ; CHECK-LABEL: @test_pattern(
76 ; CHECK: call void @memset_pattern16