[llvm] f5dd9dd - Remove support for 10.4 Tiger from AsmPrinter
Guillaume Chatelet via llvm-commits
llvm-commits at lists.llvm.org
Mon Nov 28 00:34:08 PST 2022
Author: Guillaume Chatelet
Date: 2022-11-28T08:31:49Z
New Revision: f5dd9dda63d14323dca56b634c968ca9b1b5a686
URL: https://github.com/llvm/llvm-project/commit/f5dd9dda63d14323dca56b634c968ca9b1b5a686
DIFF: https://github.com/llvm/llvm-project/commit/f5dd9dda63d14323dca56b634c968ca9b1b5a686.diff
LOG: Remove support for 10.4 Tiger from AsmPrinter
I stumbled on this while trying to tighten Alignment in MCStreamer (D138705).
>From the [wikipedia page](https://en.wikipedia.org/wiki/Mac_OS_X_Tiger), last release of MacOSX Tiger was released 15 years ago and is not supported anymore by Apple.
Relevant commit : https://github.com/llvm/llvm-project/commit/9f06f911d197577b80d208a167980833b4fb9ad5#diff-17b326b45ef392288420bed274616afa7df81b27576c96723b3c25f5198dc398
Differential Revision: https://reviews.llvm.org/D138707
Added:
Modified:
llvm/include/llvm/MC/MCObjectFileInfo.h
llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
llvm/lib/MC/MCObjectFileInfo.cpp
Removed:
################################################################################
diff --git a/llvm/include/llvm/MC/MCObjectFileInfo.h b/llvm/include/llvm/MC/MCObjectFileInfo.h
index 30276f70e5fd0..2ac18a28805db 100644
--- a/llvm/include/llvm/MC/MCObjectFileInfo.h
+++ b/llvm/include/llvm/MC/MCObjectFileInfo.h
@@ -27,10 +27,6 @@ class MCSection;
class MCObjectFileInfo {
protected:
- /// True if .comm supports alignment. This is a hack for as long as we
- /// support 10.4 Tiger, whose assembler doesn't support alignment on comm.
- bool CommDirectiveSupportsAlignment = false;
-
/// True if target object file supports a weak_definition of constant 0 for an
/// omitted EH frame.
bool SupportsWeakOmittedEHFrame = false;
@@ -257,10 +253,6 @@ class MCObjectFileInfo {
return OmitDwarfIfHaveCompactUnwind;
}
- bool getCommDirectiveSupportsAlignment() const {
- return CommDirectiveSupportsAlignment;
- }
-
unsigned getFDEEncoding() const { return FDECFIEncoding; }
unsigned getCompactUnwindDwarfEHFrameOnly() const {
diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 5238030a48775..414bed41d80f2 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -744,10 +744,7 @@ void AsmPrinter::emitGlobalVariable(const GlobalVariable *GV) {
if (GVKind.isCommon()) {
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
// .comm _foo, 42, 4
- const bool SupportsAlignment =
- getObjFileLowering().getCommDirectiveSupportsAlignment();
- OutStreamer->emitCommonSymbol(GVSym, Size,
- SupportsAlignment ? Alignment.value() : 0);
+ OutStreamer->emitCommonSymbol(GVSym, Size, Alignment.value());
return;
}
@@ -788,10 +785,7 @@ void AsmPrinter::emitGlobalVariable(const GlobalVariable *GV) {
// .local _foo
OutStreamer->emitSymbolAttribute(GVSym, MCSA_Local);
// .comm _foo, 42, 4
- const bool SupportsAlignment =
- getObjFileLowering().getCommDirectiveSupportsAlignment();
- OutStreamer->emitCommonSymbol(GVSym, Size,
- SupportsAlignment ? Alignment.value() : 0);
+ OutStreamer->emitCommonSymbol(GVSym, Size, Alignment.value());
return;
}
diff --git a/llvm/lib/MC/MCObjectFileInfo.cpp b/llvm/lib/MC/MCObjectFileInfo.cpp
index 57839473205f9..00213efb36c5e 100644
--- a/llvm/lib/MC/MCObjectFileInfo.cpp
+++ b/llvm/lib/MC/MCObjectFileInfo.cpp
@@ -80,10 +80,6 @@ void MCObjectFileInfo::initMachOMCObjectFileInfo(const Triple &T) {
FDECFIEncoding = dwarf::DW_EH_PE_pcrel;
- // .comm doesn't support alignment before Leopard.
- if (T.isMacOSX() && T.isMacOSXVersionLT(10, 5))
- CommDirectiveSupportsAlignment = false;
-
TextSection // .text
= Ctx->getMachOSection("__TEXT", "__text",
MachO::S_ATTR_PURE_INSTRUCTIONS,
@@ -556,8 +552,6 @@ void MCObjectFileInfo::initCOFFMCObjectFileInfo(const Triple &T) {
// and to set the ISA selection bit for calls accordingly.
const bool IsThumb = T.getArch() == Triple::thumb;
- CommDirectiveSupportsAlignment = true;
-
// COFF
BSSSection = Ctx->getCOFFSection(
".bss", COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |
@@ -1035,7 +1029,6 @@ void MCObjectFileInfo::initMCObjectFileInfo(MCContext &MCCtx, bool PIC,
Ctx = &MCCtx;
// Common.
- CommDirectiveSupportsAlignment = true;
SupportsWeakOmittedEHFrame = true;
SupportsCompactUnwindWithoutEHFrame = false;
OmitDwarfIfHaveCompactUnwind = false;
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