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gerrit-public.fairphone.software / fp2-dev / platform / external / llvm / 6c41ad8c9a93668c481436fc4a5e47e6f14776e7 / . / test / CodeGen / X86 / memcpy.ll
blob: 7bc31bec163def423d389f304c5ca0bd7eff1cce [file] [log] [blame]
Chris Lattner0ece9a12010-05-31 17:27:17 +0000[diff] [blame]1; RUN: llc < %s -march=x86-64 | FileCheck %s
Rafael Espindola068317b2007-09-28 12:53:01 +0000[diff] [blame]2
Chris Lattner0ece9a12010-05-31 17:27:17 +0000[diff] [blame]3declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
Rafael Espindola068317b2007-09-28 12:53:01 +0000[diff] [blame]4
Chris Lattner0ece9a12010-05-31 17:27:17 +0000[diff] [blame]5
6; Variable memcpy's should lower to calls.
7define i8* @test1(i8* %a, i8* %b, i64 %n) nounwind {
Rafael Espindola068317b2007-09-28 12:53:01 +0000[diff] [blame]8entry:
Chris Lattner0ece9a12010-05-31 17:27:17 +0000[diff] [blame]9 tail call void @llvm.memcpy.p0i8.p0i8.i64( i8* %a, i8* %b, i64 %n, i32 1, i1 0 )
Rafael Espindola068317b2007-09-28 12:53:01 +0000[diff] [blame]10 ret i8* %a
Chris Lattner0ece9a12010-05-31 17:27:17 +0000[diff] [blame]11
12; CHECK: test1:
13; CHECK: memcpy
Rafael Espindola068317b2007-09-28 12:53:01 +0000[diff] [blame]14}
15
Chris Lattner0ece9a12010-05-31 17:27:17 +0000[diff] [blame]16; Variable memcpy's should lower to calls.
17define i8* @test2(i64* %a, i64* %b, i64 %n) nounwind {
Rafael Espindola068317b2007-09-28 12:53:01 +0000[diff] [blame]18entry:
19 %tmp14 = bitcast i64* %a to i8*
20 %tmp25 = bitcast i64* %b to i8*
Chris Lattner0ece9a12010-05-31 17:27:17 +0000[diff] [blame]21 tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %tmp14, i8* %tmp25, i64 %n, i32 8, i1 0 )
Rafael Espindola068317b2007-09-28 12:53:01 +0000[diff] [blame]22 ret i8* %tmp14
Chris Lattner0ece9a12010-05-31 17:27:17 +0000[diff] [blame]23
24; CHECK: test2:
25; CHECK: memcpy
Rafael Espindola068317b2007-09-28 12:53:01 +0000[diff] [blame]26}
Chris Lattner0ece9a12010-05-31 17:27:17 +0000[diff] [blame]27
Chris Lattner6c41ad82010-05-31 17:30:14 +0000[diff] [blame^]28; Large constant memcpy's should lower to a call when optimizing for size.
29; PR6623
30define void @test3(i8* nocapture %A, i8* nocapture %B) nounwind optsize noredzone {
31entry:
32 tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A, i8* %B, i64 64, i32 1, i1 false)
33 ret void
34; CHECK: test3:
35; CHECK: memcpy
36}
37
38; Large constant memcpy's should be inlined when not optimizing for size.
39define void @test4(i8* nocapture %A, i8* nocapture %B) nounwind noredzone {
40entry:
41 tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A, i8* %B, i64 64, i32 1, i1 false)
42 ret void
43; CHECK: test4:
44; CHECK: movq
45; CHECK: movq
46; CHECK: movq
47; CHECK: movq
48; CHECK: movq
49; CHECK: movq
50; CHECK: movq
51; CHECK: movq
52; CHECK: movq
53; CHECK: movq
54; CHECK: movq
55; CHECK: movq
56}
57