Remove unused patch file.

0001-Backport-Handle-data-at-the-beginning-of-a-function.patch

@@ -1,109 +0,0 @@
-From 963d19d86cca708957055f3072cbe8473c8e52e3 Mon Sep 17 00:00:00 2001
-From: xiongzhou4 <xiongzhou4@huawei.com>
-Date: Thu, 15 Jun 2023 20:34:42 +0800
-Subject: [PATCH] [Backport] [BOLT] [AArch64] Handle data at the beginning of a
- function when disassembling and building CFG.
-
----
- bolt/src/BinaryFunction.cpp          | 11 +++++++----
- bolt/src/BinaryFunction.h            |  9 +++++++++
- bolt/src/Exceptions.cpp              |  2 +-
- bolt/test/AArch64/data-at-0-offset.c | 17 +++++++++++++++++
- 4 files changed, 34 insertions(+), 5 deletions(-)
- create mode 100644 bolt/test/AArch64/data-at-0-offset.c
-
-diff --git a/bolt/src/BinaryFunction.cpp b/bolt/src/BinaryFunction.cpp
-index 9414b83ad..93de63d3f 100644
---- a/bolt/src/BinaryFunction.cpp
-+++ b/bolt/src/BinaryFunction.cpp
-@@ -1445,6 +1445,9 @@ add_instruction:
-     addInstruction(Offset, std::move(Instruction));
-   }
- 
-+  if (uint64_t Offset = getFirstInstructionOffset())
-+    Labels[Offset] = BC.Ctx->createNamedTempSymbol();
-+
-   clearList(Relocations);
- 
-   if (!IsSimple) {
-@@ -1987,7 +1990,7 @@ bool BinaryFunction::buildCFG(MCPlusBuilder::AllocatorIdTy AllocatorId) {
-     return false;
- 
-   assert(BasicBlocks.empty() && "basic block list should be empty");
--  assert((Labels.find(0) != Labels.end()) &&
-+  assert((Labels.find(getFirstInstructionOffset()) != Labels.end()) &&
-          "first instruction should always have a label");
- 
-   // Create basic blocks in the original layout order:
-@@ -2087,9 +2090,9 @@ bool BinaryFunction::buildCFG(MCPlusBuilder::AllocatorIdTy AllocatorId) {
-         updateOffset(LastInstrOffset);
-       }
-     }
--    if (Offset == 0) {
--      // Add associated CFI pseudos in the first offset (0)
--      addCFIPlaceholders(0, InsertBB);
-+    if (Offset == getFirstInstructionOffset()) {
-+      // Add associated CFI pseudos in the first offset.
-+      addCFIPlaceholders(Offset, InsertBB);
-     }
- 
-     const bool IsBlockEnd = MIB->isTerminator(Instr);
-diff --git a/bolt/src/BinaryFunction.h b/bolt/src/BinaryFunction.h
-index a824f3d58..3b435cfb3 100644
---- a/bolt/src/BinaryFunction.h
-+++ b/bolt/src/BinaryFunction.h
-@@ -967,6 +967,15 @@ public:
-     return const_cast<BinaryFunction *>(this)->getInstructionAtOffset(Offset);
-   }
- 
-+  /// Return offset for the first instruction. If there is data at the
-+  /// beginning of a function then offset of the first instruction could
-+  /// be different from 0.
-+  uint64_t getFirstInstructionOffset() const {
-+    if (Instructions.empty())
-+      return 0;
-+    return Instructions.begin()->first;
-+  }
-+
-   /// Return jump table that covers a given \p Address in memory.
-   JumpTable *getJumpTableContainingAddress(uint64_t Address) {
-     auto JTI = JumpTables.upper_bound(Address);
-diff --git a/bolt/src/Exceptions.cpp b/bolt/src/Exceptions.cpp
-index f73054aa8..0a64e3fca 100644
---- a/bolt/src/Exceptions.cpp
-+++ b/bolt/src/Exceptions.cpp
-@@ -499,7 +499,7 @@ bool CFIReaderWriter::fillCFIInfoFor(BinaryFunction &Function) const {
-   Optional<uint64_t> LSDA = CurFDE.getLSDAAddress();
-   Function.setLSDAAddress(LSDA ? *LSDA : 0);
- 
--  uint64_t Offset = 0;
-+  uint64_t Offset = Function.getFirstInstructionOffset();
-   uint64_t CodeAlignment = CurFDE.getLinkedCIE()->getCodeAlignmentFactor();
-   uint64_t DataAlignment = CurFDE.getLinkedCIE()->getDataAlignmentFactor();
-   if (CurFDE.getLinkedCIE()->getPersonalityAddress()) {
-diff --git a/bolt/test/AArch64/data-at-0-offset.c b/bolt/test/AArch64/data-at-0-offset.c
-new file mode 100644
-index 000000000..e0c689a19
---- /dev/null
-+++ b/bolt/test/AArch64/data-at-0-offset.c
-@@ -0,0 +1,17 @@
-+// RUN: %clang %cflags -O2 -fPIE -Wl,-q -pie  %s -o %t.exe
-+// RUN: llvm-bolt %t.exe -o %t.bolt 2>&1 | FileCheck %s
-+// CHECK-NOT: BOLT-WARNING: unable to disassemble instruction at offset
-+
-+void extra_space() {
-+  asm volatile(".rept 256\n"
-+               "    .byte 0xff\n"
-+               ".endr\n");
-+  return;
-+}
-+
-+int main(int argc, char **argv) {
-+  void (*fn)(void);
-+  fn = extra_space + 256;
-+  fn();
-+  return 0;
-+}
--- 
-2.33.0
-