mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-22 20:43:44 +02:00
98b9ddd887
Fixed the ASAN failure from before in r338148, so recommiting. This patch enables the MachineOutliner by default in AArch64 under -Oz. The MachineOutliner offers around a 4.5% improvement on the current -Oz code size improvements. We have done work into improving the debuggability of outlined code, so that users of -Oz won't be surprised by the optimization. We have also been executing the LLVM test suite and common external tests such as the SPEC suites continuously with no issue. The outliner has a low compile-time overhead of roughly 1%. At this point, the outliner would be a really good addition to the -Oz pass pipeline! llvm-svn: 338160
114 lines
3.5 KiB
LLVM
114 lines
3.5 KiB
LLVM
; RUN: llc %s -enable-machine-outliner=never -mtriple=arm64-apple-darwin -o - \
|
|
; RUN: | FileCheck --check-prefixes=CHECK,CHECK-DARWIN %s
|
|
; RUN: llc %s -enable-machine-outliner=never -mtriple=arm64-linux-gnu -o - | \
|
|
; RUN: FileCheck --check-prefixes=CHECK,CHECK-LINUX %s
|
|
; <rdar://problem/14199482> ARM64: Calls to bzero() replaced with calls to memset()
|
|
|
|
; CHECK-LABEL: fct1:
|
|
; For small size (<= 256), we do not change memset to bzero.
|
|
; CHECK-DARWIN: {{b|bl}} _memset
|
|
; CHECK-LINUX: {{b|bl}} memset
|
|
define void @fct1(i8* nocapture %ptr) minsize {
|
|
entry:
|
|
tail call void @llvm.memset.p0i8.i64(i8* %ptr, i8 0, i64 256, i1 false)
|
|
ret void
|
|
}
|
|
|
|
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1)
|
|
|
|
; CHECK-LABEL: fct2:
|
|
; When the size is bigger than 256, change into bzero.
|
|
; CHECK-DARWIN: {{b|bl}} _bzero
|
|
; CHECK-LINUX: {{b|bl}} memset
|
|
define void @fct2(i8* nocapture %ptr) minsize {
|
|
entry:
|
|
tail call void @llvm.memset.p0i8.i64(i8* %ptr, i8 0, i64 257, i1 false)
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: fct3:
|
|
; For unknown size, change to bzero.
|
|
; CHECK-DARWIN: {{b|bl}} _bzero
|
|
; CHECK-LINUX: {{b|bl}} memset
|
|
define void @fct3(i8* nocapture %ptr, i32 %unknown) minsize {
|
|
entry:
|
|
%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:
|
|
; Size <= 256, no change.
|
|
; CHECK-DARWIN: {{b|bl}} _memset
|
|
; CHECK-LINUX: {{b|bl}} memset
|
|
define void @fct4(i8* %ptr) minsize {
|
|
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-LABEL: fct5:
|
|
; Size > 256, change.
|
|
; CHECK-DARWIN: {{b|bl}} _bzero
|
|
; CHECK-LINUX: {{b|bl}} memset
|
|
define void @fct5(i8* %ptr) minsize {
|
|
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-LABEL: fct6:
|
|
; Size = unknown, change.
|
|
; CHECK-DARWIN: {{b|bl}} _bzero
|
|
; CHECK-LINUX: {{b|bl}} memset
|
|
define void @fct6(i8* %ptr, i32 %unknown) minsize {
|
|
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-LABEL: fct7:
|
|
; memset with something that is not a zero, no change.
|
|
; CHECK-DARWIN: {{b|bl}} _memset
|
|
; CHECK-LINUX: {{b|bl}} memset
|
|
define void @fct7(i8* %ptr) minsize {
|
|
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-LABEL: fct8:
|
|
; memset with something that is not a zero, no change.
|
|
; CHECK-DARWIN: {{b|bl}} _memset
|
|
; CHECK-LINUX: {{b|bl}} memset
|
|
define void @fct8(i8* %ptr) minsize {
|
|
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-LABEL: fct9:
|
|
; memset with something that is not a zero, no change.
|
|
; CHECK-DARWIN: {{b|bl}} _memset
|
|
; CHECK-LINUX: {{b|bl}} memset
|
|
define void @fct9(i8* %ptr, i32 %unknown) minsize {
|
|
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
|
|
}
|