From: Kevin Enderby <enderby@apple.com>
Date: Tue, 24 Jan 2017 23:41:04 +0000 (+0000)
Subject: Fix llvm-objdump so it picks a good CPU based for Mach-O files
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=61fed38d4336c66ed8383481f20077335626a1c4;p=llvm

Fix llvm-objdump so it picks a good CPU based for Mach-O files
for CPU_SUBTYPE_ARM_V7S and CPU_SUBTYPE_ARM_V7K.

For these two cpusubtypes they should default to a cortex-a7 CPU
to give proper disassembly without a -mcpu= flag.

rdar://27431703


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292993 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Object/MachOObjectFile.cpp b/lib/Object/MachOObjectFile.cpp
index ae1ac097169..c0a7518d1e6 100644
--- a/lib/Object/MachOObjectFile.cpp
+++ b/lib/Object/MachOObjectFile.cpp
@@ -2454,6 +2454,8 @@ Triple MachOObjectFile::getArchTriple(uint32_t CPUType, uint32_t CPUSubType,
         *ArchFlag = "armv7em";
       return Triple("thumbv7em-apple-darwin");
     case MachO::CPU_SUBTYPE_ARM_V7K:
+      if (McpuDefault)
+        *McpuDefault = "cortex-a7";
       if (ArchFlag)
         *ArchFlag = "armv7k";
       return Triple("armv7k-apple-darwin");
@@ -2464,6 +2466,8 @@ Triple MachOObjectFile::getArchTriple(uint32_t CPUType, uint32_t CPUSubType,
         *ArchFlag = "armv7m";
       return Triple("thumbv7m-apple-darwin");
     case MachO::CPU_SUBTYPE_ARM_V7S:
+      if (McpuDefault)
+        *McpuDefault = "cortex-a7";
       if (ArchFlag)
         *ArchFlag = "armv7s";
       return Triple("armv7s-apple-darwin");
diff --git a/test/tools/llvm-objdump/ARM/Inputs/divs.macho-armv7s b/test/tools/llvm-objdump/ARM/Inputs/divs.macho-armv7s
new file mode 100644
index 00000000000..b877d2d5180
Binary files /dev/null and b/test/tools/llvm-objdump/ARM/Inputs/divs.macho-armv7s differ
diff --git a/test/tools/llvm-objdump/ARM/macho-nomcpu-armv7s.test b/test/tools/llvm-objdump/ARM/macho-nomcpu-armv7s.test
new file mode 100644
index 00000000000..ff7daa8c214
--- /dev/null
+++ b/test/tools/llvm-objdump/ARM/macho-nomcpu-armv7s.test
@@ -0,0 +1,3 @@
+@ RUN: llvm-objdump -m -d %p/Inputs/divs.macho-armv7s | FileCheck %s
+
+@ CHECK: 10 f0 10 e7 sdiv r0, r0, r0