[llvm-commits] add x32 psABI support (patch splitting and test revised)

[Michael Liao]

Hi, Folks

Sorry for the long delay of resubmitting x32 psABI splitted patch. I
split the patch following the feedback. Here are the patches:

* 0001-start-x32-psABI-support.patch
  start x32 psABI support by adding 'gnux32' environment triple and
enable x32 psABI host build

* 0002-add-x32-ELF-generation-support.patch
  add x32 psABI ELF generation support

* 0003-add-x32-code-generation-support.patch
  add x32 psABI code generation support

* 0004-revise-x86-codegen-test-for-x32-psABI.patch
  revise x86 codegen tests for x32 psABI

Please commit the patch if it seems acceptable.

Yours
- Michael

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