| David Majnemer | c5601df | 2016-06-20 16:03:25 +0000 | [diff] [blame] | 1 | ; RUN: opt -loop-idiom -S < %s | FileCheck %s |
| 2 | |
| 3 | target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| 4 | target triple = "x86_64-unknown-linux-gnu" |
| 5 | |
| 6 | define void @test1() { |
| 7 | entry: |
| 8 | br label %for.body.preheader |
| 9 | |
| 10 | for.body.preheader: ; preds = %for.cond |
| 11 | br label %for.body |
| 12 | |
| 13 | for.body: ; preds = %for.body, %for.body.preheader |
| 14 | %indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ] |
| 15 | %add.ptr3 = getelementptr inbounds i32, i32* null, i32 %indvars.iv |
| 16 | %add.ptr4 = getelementptr inbounds i32, i32* %add.ptr3, i32 1 |
| 17 | %0 = load i32, i32* %add.ptr4, align 4 |
| 18 | store i32 %0, i32* %add.ptr3, align 4 |
| 19 | %indvars.iv.next = add nsw i32 %indvars.iv, 1 |
| 20 | %exitcond = icmp ne i32 %indvars.iv.next, 6 |
| 21 | br i1 %exitcond, label %for.body, label %for.body.preheader |
| 22 | } |
| 23 | |
| 24 | ; CHECK-LABEL: define void @test1( |
| 25 | ; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* null, i8* inttoptr (i64 4 to i8*), i64 24, i32 4, i1 false) |
| 26 | ; CHECK-NOT: store |