Re-submit r191472 with a fix for big endian.

llvm-objdump: Dump COFF import table if -private-headers option is given.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191557 91177308-0d34-0410-b5e6-96231b3b80d8

test/tools/llvm-objdump/Inputs/win64-unwind.exe.coff-x86_64.asm

@@ -0,0 +1,53 @@
+    .text
+    .globl func
+    .def func; .scl 2; .type 32; .endef
+    .seh_proc func
+func:
+    .seh_pushframe @code
+    subq $24, %rsp
+    .seh_stackalloc 24
+    movq %rsi, 16(%rsp)
+    .seh_savereg %rsi, 16
+    movups %xmm8, (%rsp)
+    .seh_savexmm %xmm8, 0
+    pushq %rbx
+    .seh_pushreg 3
+    mov %rsp, %rbx
+    .seh_setframe 3, 0
+    .seh_endprologue
+    .seh_handler __C_specific_handler, @except
+    .seh_handlerdata
+    .long 0
+    .text
+    .seh_startchained
+    .seh_endprologue
+    .seh_endchained
+    lea (%rbx), %rsp
+    pop %rbx
+    addq $24, %rsp
+    ret
+    .seh_endproc
+
+// Test emission of small functions.
+    .globl smallFunc
+    .def smallFunc; .scl 2; .type 32; .endef
+    .seh_proc smallFunc
+smallFunc:
+    ret
+    .seh_endproc
+
+// Function with big stack allocation.
+    .globl allocFunc
+    .def allocFunc; .scl 2; .type 32; .endef
+    .seh_proc allocFunc
+allocFunc:
+    .seh_pushframe @code
+    subq $65520, %rsp
+    .seh_stackalloc 65520
+    sub $8454128, %rsp
+    .seh_stackalloc 8454128
+    .seh_endprologue
+    add $8454128, %rsp
+    addq $65520, %rsp
+    ret
+    .seh_endproc