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Differential D64871

[llvm-lipo] Implement alignment function in -create
ClosedPublic

Authored by anushabasana on Jul 17 2019, 10:21 AM.

Details

Reviewers
smeenai
alexander-shaposhnikov
compnerd
mtrent
Commits
rG5aee1c6b102f: [llvm-lipo] Implement alignment function in -create
rL366970: [llvm-lipo] Implement alignment function in -create
Summary

Removes hard coded valuse for alignment in -create.

Test Plan: check-llvm

Diff Detail

Repository
rL LLVM

Event Timeline

anushabasana created this revision.Jul 17 2019, 10:21 AM
Herald added subscribers: llvm-commits, hiraditya. · View Herald TranscriptJul 17 2019, 10:21 AM
Harbormaster completed remote builds in B35179: Diff 210363.Jul 17 2019, 10:21 AM
anushabasana removed reviewers: smeenai, alexander-shaposhnikov, compnerd, mtrent.Jul 17 2019, 10:32 AM
anushabasana changed the visibility from "Public (No Login Required)" to "anushabasana (Anusha Basana)".
anushabasana changed the edit policy from "All Users" to "anushabasana (Anusha Basana)".
anushabasana removed a project: Restricted Project.
anushabasana removed subscribers: hiraditya, llvm-commits.
Herald added a project: Restricted Project. · View Herald TranscriptJul 17 2019, 10:32 AM
anushabasana added reviewers: smeenai, alexander-shaposhnikov, compnerd, mtrent.Jul 17 2019, 10:46 AM
anushabasana changed the visibility from "anushabasana (Anusha Basana)" to "Public (No Login Required)".
anushabasana changed the edit policy from "anushabasana (Anusha Basana)" to "All Users".
anushabasana added subscribers: hiraditya, llvm-commits.Jul 17 2019, 10:54 AM
anushabasana updated this revision to Diff 210371.EditedJul 17 2019, 11:07 AM

Include changes: spacing and compile error fix

Harbormaster completed remote builds in B35182: Diff 210371.Jul 17 2019, 11:10 AM
compnerd added inline comments.Jul 20 2019, 12:10 PM
llvm/lib/Object/MachOUniversal.cpp
164 ↗(On Diff #210371)

Personally, I would have split the changes in this file and in MachOUniversal.h into a separate change. That change is a very simple change that could probably merged immediately.

llvm/test/tools/llvm-lipo/Inputs/CPU10-slice.yaml
1 ↗(On Diff #210371)

CPU10 is not particularly helpful. Would be nice to use the human readable form (m88k).

llvm/test/tools/llvm-lipo/Inputs/CPU14-slice.yaml
1 ↗(On Diff #210371)

Similar for the file name

llvm/tools/llvm-lipo/llvm-lipo.cpp
350 ↗(On Diff #210371)

ITYM segment instead of all load commands. The alignment of something like LC_REEXPORT_DYLIB seems irrelevant to this or am I mistaken on that?

alexander-shaposhnikov added inline comments.Jul 20 2019, 2:00 PM
llvm/tools/llvm-lipo/llvm-lipo.cpp
352 ↗(On Diff #210371)

const MachOObjectFile *ObjectFile -> const MachOObjectFile &O

anushabasana marked 3 inline comments as done.Jul 22 2019, 2:31 PM
anushabasana added inline comments.
llvm/test/tools/llvm-lipo/Inputs/CPU10-slice.yaml
1 ↗(On Diff #210371)

This file and CPU14 are both intended to go into calculateSegmentAlignment() since they are not any of the valid architectures. I just manually changes the CPU types for testing. What would the best naming convention be for this situation?

anushabasana updated this revision to Diff 211198.Jul 22 2019, 2:40 PM

Address review comment + removed public MaxSectionAlignment variable to different diff.

anushabasana marked an inline comment as done.Jul 22 2019, 2:40 PM
Harbormaster completed remote builds in B35491: Diff 211198.Jul 22 2019, 2:43 PM
compnerd accepted this revision.Jul 23 2019, 9:16 PM
This revision is now accepted and ready to land.Jul 23 2019, 9:16 PM
alexander-shaposhnikov added inline comments.Jul 24 2019, 2:26 PM
llvm/tools/llvm-lipo/llvm-lipo.cpp
355 ↗(On Diff #211198)

const bool

anushabasana marked 3 inline comments as done.Jul 24 2019, 3:47 PM
anushabasana updated this revision to Diff 211619.Jul 24 2019, 3:47 PM

const bool

Harbormaster completed remote builds in B35614: Diff 211619.Jul 24 2019, 3:50 PM
Closed by commit rL366970: [llvm-lipo] Implement alignment function in -create (authored by smeenai). · Explain WhyJul 24 2019, 5:29 PM
This revision was automatically updated to reflect the committed changes.

Revision Contents

PathSize
llvm/
trunk/
test/
tools/
llvm-lipo/
Inputs/
359 lines
88 lines
20 lines
32 lines
32 lines
tools/
llvm-lipo/
40 lines

Diff 211646

llvm/trunk/test/tools/llvm-lipo/Inputs/CPU10-slice.yaml

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llvm/trunk/test/tools/llvm-lipo/Inputs/CPU14-slice.yaml

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llvm/trunk/test/tools/llvm-lipo/create-compute-alignment.test

# RUN: yaml2obj %p/Inputs/i386-slice.yaml > %t-i386.o
# RUN: yaml2obj %p/Inputs/CPU14-slice.yaml > %t-CPU14.o
# RUN: yaml2obj %p/Inputs/CPU10-slice.yaml > %t-CPU10.o
# RUN: llvm-lipo %t-i386.o %t-CPU14.o %t-CPU10.o -create -output %t-universal.o
# RUN: llvm-objdump %t-universal.o -m --universal-headers | FileCheck %s
# CHECK: fat_magic FAT_MAGIC
# CHECK: nfat_arch 3
# CHECK: architecture
# CHECK: cputype (10)
# CHECK: offset 72
# CHECK: align 2^3 (8)
# CHECK: architecture
# CHECK: cputype (14)
# CHECK: offset 8544
# CHECK: align 2^4 (16)
# CHECK: architecture i386
# CHECK: offset 12288
# CHECK: align 2^12 (4096)

llvm/trunk/test/tools/llvm-lipo/create-default-alignment.test

# RUN: yaml2obj %p/Inputs/i386-slice.yaml > %t-i386.o
# RUN: yaml2obj %p/Inputs/x86_64-slice.yaml > %t-x86_64.o
# RUN: llvm-lipo %t-i386.o %t-x86_64.o -create -output %t-universal-llvm.o
# RUN: yaml2obj %p/Inputs/i386-x86_64-universal.yaml > %t-universal.o
# RUN: cmp %t-universal-llvm.o %t-universal.o
# RUN: yaml2obj %p/Inputs/armv7-slice.yaml > %t-armv7.o
# RUN: yaml2obj %p/Inputs/arm64-slice.yaml > %t-arm64.o
# RUN: llvm-lipo %t-arm64.o %t-armv7.o %t-universal.o -create -output %t-universal-2.o
# RUN: llvm-lipo %t-universal-2.o -thin x86_64 -output %t-x86_64_extracted.o
# RUN: cmp %t-x86_64_extracted.o %t-x86_64.o
# RUN: llvm-lipo %t-universal-2.o -thin armv7 -output %t-armv7-extracted.o
# RUN: cmp %t-armv7-extracted.o %t-armv7.o
# RUN: llvm-objdump %t-universal-2.o -m --universal-headers | FileCheck %s
# CHECK: fat_magic FAT_MAGIC
# CHECK: nfat_arch 4
# CHECK: architecture i386
# CHECK: offset 4096
# CHECK: align 2^12 (4096)
# CHECK: architecture x86_64
# CHECK: offset 8192
# CHECK: align 2^12 (4096)
# CHECK: architecture armv7
# CHECK: offset 16384
# CHECK: align 2^14 (16384)
# CHECK: architecture arm64
# CHECK: offset 32768
# CHECK: align 2^14 (16384)

llvm/trunk/test/tools/llvm-lipo/create-without-alignment.test

# RUN: yaml2obj %p/Inputs/i386-slice.yaml > %t-i386.o
# RUN: yaml2obj %p/Inputs/x86_64-slice.yaml > %t-x86_64.o
# RUN: llvm-lipo %t-i386.o %t-x86_64.o -create -output %t-universal-llvm.o
# RUN: yaml2obj %p/Inputs/i386-x86_64-universal.yaml > %t-universal.o
# RUN: cmp %t-universal-llvm.o %t-universal.o
# RUN: yaml2obj %p/Inputs/armv7-slice.yaml > %t-armv7.o
# RUN: yaml2obj %p/Inputs/arm64-slice.yaml > %t-arm64.o
# RUN: llvm-lipo %t-arm64.o %t-armv7.o %t-universal.o -create -output %t-universal-2.o
# RUN: llvm-lipo %t-universal-2.o -thin x86_64 -output %t-x86_64_extracted.o
# RUN: cmp %t-x86_64_extracted.o %t-x86_64.o
# RUN: llvm-lipo %t-universal-2.o -thin armv7 -output %t-armv7-extracted.o
# RUN: cmp %t-armv7-extracted.o %t-armv7.o
# RUN: llvm-objdump %t-universal-2.o -m --universal-headers | FileCheck %s
# CHECK: fat_magic FAT_MAGIC
# CHECK: nfat_arch 4
# CHECK: architecture i386
# CHECK: offset 4096
# CHECK: align 2^12 (4096)
# CHECK: architecture x86_64
# CHECK: offset 8192
# CHECK: align 2^12 (4096)
# CHECK: architecture armv7
# CHECK: offset 16384
# CHECK: align 2^14 (16384)
# CHECK: architecture arm64
# CHECK: offset 32768
# CHECK: align 2^14 (16384)

llvm/trunk/tools/llvm-lipo/llvm-lipo.cpp

Show First 20 Lines • Show All 368 Lines • ▼ Show 20 Lines for (const auto &S : Slices) {
if (!Entry.second) if (!Entry.second)
reportError(Entry.first->second->getFileName() + " and " + reportError(Entry.first->second->getFileName() + " and " +
S.ObjectFile->getFileName() + " have the same architecture " + S.ObjectFile->getFileName() + " have the same architecture " +
getArchString(*S.ObjectFile) + getArchString(*S.ObjectFile) +
" and therefore cannot be in the same universal binary"); " and therefore cannot be in the same universal binary");
} }
} }
static uint32_t calculateAlignment(const MachOObjectFile *ObjectFile) { // For compatibility with cctools lipo, alignment is calculated as the minimum
// TODO: Implement getAlign() and remove hard coding // aligment of all segments. Each segments's alignment is the maximum alignment
// Will be implemented in a follow-up. // from its sections
static uint32_t calculateSegmentAlignment(const MachOObjectFile &O) {
uint32_t P2CurrentAlignment;
uint32_t P2MinAlignment = MachOUniversalBinary::MaxSectionAlignment;
const bool Is64Bit = O.is64Bit();
for (const auto &LC : O.load_commands()) {
if (LC.C.cmd != (Is64Bit ? MachO::LC_SEGMENT_64 : MachO::LC_SEGMENT))
continue;
if (O.getHeader().filetype == MachO::MH_OBJECT) {
unsigned NumberOfSections =
(Is64Bit ? O.getSegment64LoadCommand(LC).nsects
: O.getSegmentLoadCommand(LC).nsects);
P2CurrentAlignment = NumberOfSections ? 2 : P2MinAlignment;
for (unsigned SI = 0; SI < NumberOfSections; ++SI) {
P2CurrentAlignment = std::max(P2CurrentAlignment,
(Is64Bit ? O.getSection64(LC, SI).align
: O.getSection(LC, SI).align));
}
} else {
P2CurrentAlignment =
countTrailingZeros(Is64Bit ? O.getSegment64LoadCommand(LC).vmaddr
: O.getSegmentLoadCommand(LC).vmaddr);
}
P2MinAlignment = std::min(P2MinAlignment, P2CurrentAlignment);
}
// return a value >= 4 byte aligned, and less than MachO MaxSectionAlignment
return std::max(
static_cast<uint32_t>(2),
std::min(P2MinAlignment, static_cast<uint32_t>(
MachOUniversalBinary::MaxSectionAlignment)));
}
static uint32_t calculateAlignment(const MachOObjectFile *ObjectFile) {
switch (ObjectFile->getHeader().cputype) { switch (ObjectFile->getHeader().cputype) {
case MachO::CPU_TYPE_I386: case MachO::CPU_TYPE_I386:
case MachO::CPU_TYPE_X86_64: case MachO::CPU_TYPE_X86_64:
case MachO::CPU_TYPE_POWERPC: case MachO::CPU_TYPE_POWERPC:
case MachO::CPU_TYPE_POWERPC64: case MachO::CPU_TYPE_POWERPC64:
return 12; // log2 value of page size(4k) for x86 and PPC return 12; // log2 value of page size(4k) for x86 and PPC
case MachO::CPU_TYPE_ARM: case MachO::CPU_TYPE_ARM:
case MachO::CPU_TYPE_ARM64: case MachO::CPU_TYPE_ARM64:
case MachO::CPU_TYPE_ARM64_32: case MachO::CPU_TYPE_ARM64_32:
return 14; // log2 value of page size(16k) for Darwin ARM return 14; // log2 value of page size(16k) for Darwin ARM
default: default:
return 12; return calculateSegmentAlignment(*ObjectFile);
} }
} }
// This function replicates ordering from cctools lipo for consistency // This function replicates ordering from cctools lipo for consistency
static bool compareSlices(const Slice &Lhs, const Slice &Rhs) { static bool compareSlices(const Slice &Lhs, const Slice &Rhs) {
if (Lhs.ObjectFile->getHeader().cputype == if (Lhs.ObjectFile->getHeader().cputype ==
Rhs.ObjectFile->getHeader().cputype) Rhs.ObjectFile->getHeader().cputype)
return Lhs.ObjectFile->getHeader().cpusubtype < return Lhs.ObjectFile->getHeader().cpusubtype <
▲ Show 20 Lines • Show All 152 Lines • Show Last 20 Lines
llvm/trunk/test/tools/llvm-lipo/create-default-alignment.test