1 ; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=core2 | FileCheck %s -check-prefix=LINUX 2 ; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=core2 | FileCheck %s -check-prefix=DARWIN 3 4 declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind 5 6 7 ; Variable memcpy's should lower to calls. 8 define i8* @test1(i8* %a, i8* %b, i64 %n) nounwind { 9 entry: 10 tail call void @llvm.memcpy.p0i8.p0i8.i64( i8* %a, i8* %b, i64 %n, i32 1, i1 0 ) 11 ret i8* %a 12 13 ; LINUX: test1: 14 ; LINUX: memcpy 15 } 16 17 ; Variable memcpy's should lower to calls. 18 define i8* @test2(i64* %a, i64* %b, i64 %n) nounwind { 19 entry: 20 %tmp14 = bitcast i64* %a to i8* 21 %tmp25 = bitcast i64* %b to i8* 22 tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %tmp14, i8* %tmp25, i64 %n, i32 8, i1 0 ) 23 ret i8* %tmp14 24 25 ; LINUX: test2: 26 ; LINUX: memcpy 27 } 28 29 ; Large constant memcpy's should lower to a call when optimizing for size. 30 ; PR6623 31 32 ; On the other hand, Darwin's definition of -Os is optimizing for size without 33 ; hurting performance so it should just ignore optsize when expanding memcpy. 34 ; rdar://8821501 35 define void @test3(i8* nocapture %A, i8* nocapture %B) nounwind optsize noredzone { 36 entry: 37 tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A, i8* %B, i64 64, i32 1, i1 false) 38 ret void 39 ; LINUX: test3: 40 ; LINUX: memcpy 41 42 ; DARWIN: test3: 43 ; DARWIN-NOT: memcpy 44 ; DARWIN: movq 45 ; DARWIN: movq 46 ; DARWIN: movq 47 ; DARWIN: movq 48 ; DARWIN: movq 49 ; DARWIN: movq 50 ; DARWIN: movq 51 ; DARWIN: movq 52 ; DARWIN: movq 53 ; DARWIN: movq 54 ; DARWIN: movq 55 ; DARWIN: movq 56 ; DARWIN: movq 57 ; DARWIN: movq 58 ; DARWIN: movq 59 ; DARWIN: movq 60 } 61 62 ; Large constant memcpy's should be inlined when not optimizing for size. 63 define void @test4(i8* nocapture %A, i8* nocapture %B) nounwind noredzone { 64 entry: 65 tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A, i8* %B, i64 64, i32 1, i1 false) 66 ret void 67 ; LINUX: test4: 68 ; LINUX movq 69 ; LINUX movq 70 ; LINUX movq 71 ; LINUX movq 72 ; LINUX movq 73 ; LINUX movq 74 ; LINUX movq 75 ; LINUX movq 76 ; LINUX movq 77 ; LINUX movq 78 ; LINUX movq 79 ; LINUX movq 80 } 81 82
