84 lines
2.7 KiB
LLVM
84 lines
2.7 KiB
LLVM
; RUN: llc %s -enable-machine-outliner=never -mtriple=arm64-apple-darwin -o - | FileCheck %s --check-prefix=DARWIN
|
|
; RUN: llc %s -enable-machine-outliner=never -mtriple=arm64-linux-gnu -o - | FileCheck %s --check-prefix=LINUX
|
|
; <rdar://problem/14199482> ARM64: Calls to bzero() replaced with calls to memset()
|
|
|
|
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1)
|
|
|
|
; CHECK-LABEL: fct1:
|
|
; Constant size memset to zero.
|
|
; DARWIN: {{b|bl}} _bzero
|
|
; LINUX: {{b|bl}} memset
|
|
define void @fct1(i8* nocapture %ptr) minsize {
|
|
tail call void @llvm.memset.p0i8.i64(i8* %ptr, i8 0, i64 256, i1 false)
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: fct3:
|
|
; Variable size memset to zero.
|
|
; DARWIN: {{b|bl}} _bzero
|
|
; LINUX: {{b|bl}} memset
|
|
define void @fct3(i8* nocapture %ptr, i32 %unknown) minsize {
|
|
%conv = sext i32 %unknown to i64
|
|
tail call void @llvm.memset.p0i8.i64(i8* %ptr, i8 0, i64 %conv, i1 false)
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: fct4:
|
|
; Variable size checked memset to zero.
|
|
; DARWIN: {{b|bl}} _bzero
|
|
; LINUX: {{b|bl}} memset
|
|
define void @fct4(i8* %ptr) minsize {
|
|
%tmp = tail call i64 @llvm.objectsize.i64(i8* %ptr, i1 false)
|
|
%call = tail call i8* @__memset_chk(i8* %ptr, i32 0, i64 256, i64 %tmp)
|
|
ret void
|
|
}
|
|
|
|
declare i8* @__memset_chk(i8*, i32, i64, i64)
|
|
|
|
declare i64 @llvm.objectsize.i64(i8*, i1)
|
|
|
|
; CHECK-LABEL: fct6:
|
|
; Size = unknown, change.
|
|
; DARWIN: {{b|bl}} _bzero
|
|
; LINUX: {{b|bl}} memset
|
|
define void @fct6(i8* %ptr, i32 %unknown) minsize {
|
|
%conv = sext i32 %unknown to i64
|
|
%tmp = tail call i64 @llvm.objectsize.i64(i8* %ptr, i1 false)
|
|
%call = tail call i8* @__memset_chk(i8* %ptr, i32 0, i64 %conv, i64 %tmp)
|
|
ret void
|
|
}
|
|
|
|
; Next functions check that memset is not turned into bzero
|
|
; when the set constant is non-zero, whatever the given size.
|
|
|
|
; CHECK-LABEL: fct7:
|
|
; memset with something that is not a zero, no change.
|
|
; DARWIN: {{b|bl}} _memset
|
|
; LINUX: {{b|bl}} memset
|
|
define void @fct7(i8* %ptr) minsize {
|
|
%tmp = tail call i64 @llvm.objectsize.i64(i8* %ptr, i1 false)
|
|
%call = tail call i8* @__memset_chk(i8* %ptr, i32 1, i64 256, i64 %tmp)
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: fct8:
|
|
; memset with something that is not a zero, no change.
|
|
; DARWIN: {{b|bl}} _memset
|
|
; LINUX: {{b|bl}} memset
|
|
define void @fct8(i8* %ptr) minsize {
|
|
%tmp = tail call i64 @llvm.objectsize.i64(i8* %ptr, i1 false)
|
|
%call = tail call i8* @__memset_chk(i8* %ptr, i32 1, i64 257, i64 %tmp)
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: fct9:
|
|
; memset with something that is not a zero, no change.
|
|
; DARWIN: {{b|bl}} _memset
|
|
; LINUX: {{b|bl}} memset
|
|
define void @fct9(i8* %ptr, i32 %unknown) minsize {
|
|
%conv = sext i32 %unknown to i64
|
|
%tmp = tail call i64 @llvm.objectsize.i64(i8* %ptr, i1 false)
|
|
%call = tail call i8* @__memset_chk(i8* %ptr, i32 1, i64 %conv, i64 %tmp)
|
|
ret void
|
|
}
|