| Haicheng Wu | f1c00a2 | 2016-01-26 02:27:47 +0000 | [diff] [blame] | 1 | ; RUN: opt -basicaa -loop-idiom < %s -S | FileCheck %s |
| 2 | target datalayout = "e-p:64:64:64-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" |
| 3 | |
| Benjamin Kramer | db9e0b6 | 2017-01-22 20:28:56 +0000 | [diff] [blame^] | 4 | ; CHECK: @.memset_pattern = private unnamed_addr constant [4 x i32] [i32 2, i32 2, i32 2, i32 2], align 16 |
| Haicheng Wu | f1c00a2 | 2016-01-26 02:27:47 +0000 | [diff] [blame] | 5 | |
| 6 | target triple = "x86_64-apple-darwin10.0.0" |
| 7 | |
| 8 | ;void test(int *f, unsigned n) { |
| 9 | ; for (unsigned i = 0; i < 2 * n; i += 2) { |
| 10 | ; f[i] = 0; |
| 11 | ; f[i+1] = 0; |
| 12 | ; } |
| 13 | ;} |
| 14 | define void @test(i32* %f, i32 %n) nounwind ssp { |
| 15 | entry: |
| 16 | %mul = shl i32 %n, 1 |
| 17 | %cmp1 = icmp eq i32 %mul, 0 |
| 18 | br i1 %cmp1, label %for.end, label %for.body.preheader |
| 19 | |
| 20 | for.body.preheader: ; preds = %entry |
| 21 | %0 = zext i32 %mul to i64 |
| 22 | br label %for.body |
| 23 | |
| 24 | for.body: ; preds = %for.body.preheader, %for.body |
| 25 | %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ] |
| 26 | %arrayidx = getelementptr inbounds i32, i32* %f, i64 %indvars.iv |
| 27 | store i32 0, i32* %arrayidx, align 4 |
| 28 | %1 = or i64 %indvars.iv, 1 |
| 29 | %arrayidx2 = getelementptr inbounds i32, i32* %f, i64 %1 |
| 30 | store i32 0, i32* %arrayidx2, align 4 |
| 31 | %indvars.iv.next = add nuw nsw i64 %indvars.iv, 2 |
| 32 | %cmp = icmp ult i64 %indvars.iv.next, %0 |
| 33 | br i1 %cmp, label %for.body, label %for.end.loopexit |
| 34 | |
| 35 | for.end.loopexit: ; preds = %for.body |
| 36 | br label %for.end |
| 37 | |
| 38 | for.end: ; preds = %for.end.loopexit, %entry |
| 39 | ret void |
| 40 | ; CHECK-LABEL: @test( |
| 41 | ; CHECK: call void @llvm.memset |
| 42 | ; CHECK-NOT: store |
| 43 | } |
| 44 | |
| 45 | ;void test_pattern(int *f, unsigned n) { |
| 46 | ; for (unsigned i = 0; i < 2 * n; i += 2) { |
| 47 | ; f[i] = 2; |
| 48 | ; f[i+1] = 2; |
| 49 | ; } |
| 50 | ;} |
| 51 | define void @test_pattern(i32* %f, i32 %n) nounwind ssp { |
| 52 | entry: |
| 53 | %mul = shl i32 %n, 1 |
| 54 | %cmp1 = icmp eq i32 %mul, 0 |
| 55 | br i1 %cmp1, label %for.end, label %for.body.preheader |
| 56 | |
| 57 | for.body.preheader: ; preds = %entry |
| 58 | %0 = zext i32 %mul to i64 |
| 59 | br label %for.body |
| 60 | |
| 61 | for.body: ; preds = %for.body.preheader, %for.body |
| 62 | %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ] |
| 63 | %arrayidx = getelementptr inbounds i32, i32* %f, i64 %indvars.iv |
| 64 | store i32 2, i32* %arrayidx, align 4 |
| 65 | %1 = or i64 %indvars.iv, 1 |
| 66 | %arrayidx2 = getelementptr inbounds i32, i32* %f, i64 %1 |
| 67 | store i32 2, i32* %arrayidx2, align 4 |
| 68 | %indvars.iv.next = add nuw nsw i64 %indvars.iv, 2 |
| 69 | %cmp = icmp ult i64 %indvars.iv.next, %0 |
| 70 | br i1 %cmp, label %for.body, label %for.end.loopexit |
| 71 | |
| 72 | for.end.loopexit: ; preds = %for.body |
| 73 | br label %for.end |
| 74 | |
| 75 | for.end: ; preds = %for.end.loopexit, %entry |
| 76 | ret void |
| 77 | ; CHECK-LABEL: @test_pattern( |
| 78 | ; CHECK: call void @memset_pattern16 |
| 79 | ; CHECK-NOT: store |
| 80 | } |