[llvm-size][test] Improve llvm-size testing

This patch significantly improves the llvm-size testing. The changes
made are:

1) Change all tests to use yaml2obj instead of assembly or pre-canned
   inputs.
2) Move the tests out of the X86 directory, since they don't need to be
   there after 1).
3) Increased test coverage.
4) Added comments to explain purpose of tests.

I haven't attempted to add test coverage for all Mach-O related code, as
I am not familiar enough with that file format to be able to.

Reviewers: grimar, MaskRay

Differential Revision: https://reviews.llvm.org/D66134

llvm-svn: 368821

1 files changed, 21 insertions, 0 deletions

diff --git a/llvm/test/tools/llvm-size/response-file.test b/llvm/test/tools/llvm-size/response-file.test
new file mode 100644
index 00000000000..694901eb0f0
--- /dev/null
+++ b/llvm/test/tools/llvm-size/response-file.test
@@ -0,0 +1,21 @@
+## Show that llvm-size can consume a response file.
+
+# RUN: echo "-t %t" > %t.rsp
+# RUN: yaml2obj %s -o %t
+# RUN: llvm-size -x @%t.rsp | FileCheck %s -DFILE=%t
+
+# CHECK:         text    data     bss     dec     hex filename
+# CHECK-NEXT:    0x10       0       0      16      10 [[FILE]]
+# CHECK-NEXT:    0x10       0       0      16      10 (TOTALS)
+
+--- !ELF
+FileHeader:
+  Class:   ELFCLASS64
+  Data:    ELFDATA2LSB
+  Type:    ET_EXEC
+  Machine: EM_X86_64
+Sections:
+  - Name:  .text
+    Type:  SHT_PROGBITS
+    Size:  0x10
+    Flags: [SHF_ALLOC, SHF_EXECINSTR]