mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-01-02 22:32:38 +00:00
102 lines
2.7 KiB
LLVM
102 lines
2.7 KiB
LLVM
|
; RUN: llc %s -march arm64 -o - | FileCheck %s
|
||
|
|
; <rdar://problem/14199482> ARM64: Calls to bzero() replaced with calls to memset()
|
||
|
|
|
||
|
|
; CHECK: @fct1
|
||
|
|
; For small size (<= 256), we do not change memset to bzero.
|
||
|
|
; CHECK: memset
|
||
|
|
define void @fct1(i8* nocapture %ptr) {
|
||
|
|
entry:
|
||
|
|
tail call void @llvm.memset.p0i8.i64(i8* %ptr, i8 0, i64 256, i32 1, i1 false)
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1)
|
||
|
|
|
||
|
|
; CHECK: @fct2
|
||
|
|
; When the size is bigger than 256, change into bzero.
|
||
|
|
; CHECK: bzero
|
||
|
|
define void @fct2(i8* nocapture %ptr) {
|
||
|
|
entry:
|
||
|
|
tail call void @llvm.memset.p0i8.i64(i8* %ptr, i8 0, i64 257, i32 1, i1 false)
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; CHECK: @fct3
|
||
|
|
; For unknown size, change to bzero.
|
||
|
|
; CHECK: bzero
|
||
|
|
define void @fct3(i8* nocapture %ptr, i32 %unknown) {
|
||
|
|
entry:
|
||
|
|
%conv = sext i32 %unknown to i64
|
||
|
|
tail call void @llvm.memset.p0i8.i64(i8* %ptr, i8 0, i64 %conv, i32 1, i1 false)
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; CHECK: @fct4
|
||
|
|
; Size <= 256, no change.
|
||
|
|
; CHECK: memset
|
||
|
|
define void @fct4(i8* %ptr) {
|
||
|
|
entry:
|
||
|
|
%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: @fct5
|
||
|
|
; Size > 256, change.
|
||
|
|
; CHECK: bzero
|
||
|
|
define void @fct5(i8* %ptr) {
|
||
|
|
entry:
|
||
|
|
%tmp = tail call i64 @llvm.objectsize.i64(i8* %ptr, i1 false)
|
||
|
|
%call = tail call i8* @__memset_chk(i8* %ptr, i32 0, i64 257, i64 %tmp)
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; CHECK: @fct6
|
||
|
|
; Size = unknown, change.
|
||
|
|
; CHECK: bzero
|
||
|
|
define void @fct6(i8* %ptr, i32 %unknown) {
|
||
|
|
entry:
|
||
|
|
%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: @fct7
|
||
|
|
; memset with something that is not a zero, no change.
|
||
|
|
; CHECK: memset
|
||
|
|
define void @fct7(i8* %ptr) {
|
||
|
|
entry:
|
||
|
|
%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: @fct8
|
||
|
|
; memset with something that is not a zero, no change.
|
||
|
|
; CHECK: memset
|
||
|
|
define void @fct8(i8* %ptr) {
|
||
|
|
entry:
|
||
|
|
%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: @fct9
|
||
|
|
; memset with something that is not a zero, no change.
|
||
|
|
; CHECK: memset
|
||
|
|
define void @fct9(i8* %ptr, i32 %unknown) {
|
||
|
|
entry:
|
||
|
|
%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
|
||
|
|
}
|