[llvm-branch-commits] [llvm] [DirectX] Add support for `remove-section` of `DXContainer` for `llvm-objcopy` (PR #153246)

[Helena Kotas via llvm-branch-commits]

================
@@ -0,0 +1,300 @@
+## Tests that the RTS0 (root signature) part is correctly removed from the
+## copied DXContainer.
+
+# RUN: yaml2obj %s -o %t
+# RUN: llvm-objcopy --remove-section=RTS0 %t %t.out
+# RUN: obj2yaml %t.out | FileCheck %s
+
+## The DXContainer described below was generated with:
+
+## `clang-dxc -T cs_6_7 test.hlsl /Fo temp.dxo`
+## `obj2yaml temp.dxo`
+
+## ``` test.hlsl
+## [RootSignature("")]
+## [numthreads(1,1,1)]
+## void main() {}
+## ```
+
+--- !dxcontainer
+Header:
+  Hash:            [ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+                     0x0, 0x0, 0x0, 0x0, 0x0, 0x0 ]
+  Version:
+    Major:           1
+    Minor:           0
+## FileSize = 1984 - 24 (RTS0 content) - 4 (1 part offset) - 8 (1 part header)
+##          = 1948
+## CHECK: FileSize:       1948
+  FileSize:        1984
+## CHECK: PartCount:      6
+  PartCount:       7
+  PartOffsets:     [ 60, 1792, 1808, 1836, 1852, 1868, 1900 ]
+Parts:
+## CHECK-NOT: RTS0
----------------
hekota wrote:

These should be single `#` to be processed by FileCheck, right?

```suggestion
## FileSize = 1984 - 24 (RTS0 content) - 4 (1 part offset) - 8 (1 part header)
##          = 1948
# CHECK: FileSize:       1948
  FileSize:        1984
# CHECK: PartCount:      6
  PartCount:       7
  PartOffsets:     [ 60, 1792, 1808, 1836, 1852, 1868, 1900 ]
Parts:
# CHECK-NOT: RTS0
```

https://github.com/llvm/llvm-project/pull/153246
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