1; RUN: llc %s -enable-machine-outliner=never -mtriple=arm64-apple-darwin -o - | FileCheck %s --check-prefix=DARWIN 2; RUN: llc %s -enable-machine-outliner=never -mtriple=arm64-linux-gnu -o - | FileCheck %s --check-prefix=LINUX 3; <rdar://problem/14199482> ARM64: Calls to bzero() replaced with calls to memset() 4 5declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1) 6 7; CHECK-LABEL: fct1: 8; Constant size memset to zero. 9; DARWIN: {{b|bl}} _bzero 10; LINUX: {{b|bl}} memset 11define void @fct1(ptr nocapture %ptr) minsize { 12 tail call void @llvm.memset.p0.i64(ptr %ptr, i8 0, i64 256, i1 false) 13 ret void 14} 15 16; CHECK-LABEL: fct3: 17; Variable size memset to zero. 18; DARWIN: {{b|bl}} _bzero 19; LINUX: {{b|bl}} memset 20define void @fct3(ptr nocapture %ptr, i32 %unknown) minsize { 21 %conv = sext i32 %unknown to i64 22 tail call void @llvm.memset.p0.i64(ptr %ptr, i8 0, i64 %conv, i1 false) 23 ret void 24} 25 26; CHECK-LABEL: fct4: 27; Variable size checked memset to zero. 28; DARWIN: {{b|bl}} _bzero 29; LINUX: {{b|bl}} memset 30define void @fct4(ptr %ptr) minsize { 31 %tmp = tail call i64 @llvm.objectsize.i64(ptr %ptr, i1 false) 32 %call = tail call ptr @__memset_chk(ptr %ptr, i32 0, i64 256, i64 %tmp) 33 ret void 34} 35 36declare ptr @__memset_chk(ptr, i32, i64, i64) 37 38declare i64 @llvm.objectsize.i64(ptr, i1) 39 40; CHECK-LABEL: fct6: 41; Size = unknown, change. 42; DARWIN: {{b|bl}} _bzero 43; LINUX: {{b|bl}} memset 44define void @fct6(ptr %ptr, i32 %unknown) minsize { 45 %conv = sext i32 %unknown to i64 46 %tmp = tail call i64 @llvm.objectsize.i64(ptr %ptr, i1 false) 47 %call = tail call ptr @__memset_chk(ptr %ptr, i32 0, i64 %conv, i64 %tmp) 48 ret void 49} 50 51; Next functions check that memset is not turned into bzero 52; when the set constant is non-zero, whatever the given size. 53 54; CHECK-LABEL: fct7: 55; memset with something that is not a zero, no change. 56; DARWIN: {{b|bl}} _memset 57; LINUX: {{b|bl}} memset 58define void @fct7(ptr %ptr) minsize { 59 %tmp = tail call i64 @llvm.objectsize.i64(ptr %ptr, i1 false) 60 %call = tail call ptr @__memset_chk(ptr %ptr, i32 1, i64 256, i64 %tmp) 61 ret void 62} 63 64; CHECK-LABEL: fct8: 65; memset with something that is not a zero, no change. 66; DARWIN: {{b|bl}} _memset 67; LINUX: {{b|bl}} memset 68define void @fct8(ptr %ptr) minsize { 69 %tmp = tail call i64 @llvm.objectsize.i64(ptr %ptr, i1 false) 70 %call = tail call ptr @__memset_chk(ptr %ptr, i32 1, i64 257, i64 %tmp) 71 ret void 72} 73 74; CHECK-LABEL: fct9: 75; memset with something that is not a zero, no change. 76; DARWIN: {{b|bl}} _memset 77; LINUX: {{b|bl}} memset 78define void @fct9(ptr %ptr, i32 %unknown) minsize { 79 %conv = sext i32 %unknown to i64 80 %tmp = tail call i64 @llvm.objectsize.i64(ptr %ptr, i1 false) 81 %call = tail call ptr @__memset_chk(ptr %ptr, i32 1, i64 %conv, i64 %tmp) 82 ret void 83} 84