test/c-variadic: Fix patterns on powerpc64

[smaeul]

On architectures such as powerpc64 that use extend_integer_width_to in
their C ABI processing, integer parameters shorter than the native
register width will be annotated with the ArgAttribute::SExt or
ArgAttribute::ZExt attribute, and that attribute will be included in the
generated LLVM IR.

In this test, all relevant parameters are i32, which will get the
signext annotation on the relevant 64-bit architectures. Match both
the annotated and non-annotated case, but enforce that the annotation is
applied consistently.

[rust-highfive]

r? @alexcrichton

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[smaeul]

In regard to the failing tidy checks: I'm not sure how to make the lines shorter than 100 characters, when the string being matched is longer than that.

[rust-highfive]

The job x86_64-gnu-llvm-6.0 of your PR failed (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

2019-09-07T15:34:56.1888533Z ##[command]git remote add origin https://github.com/rust-lang/rust
2019-09-07T15:34:56.2116461Z ##[command]git config gc.auto 0
2019-09-07T15:34:56.2196042Z ##[command]git config --get-all http.https://github.com/rust-lang/rust.extraheader
2019-09-07T15:34:56.2266250Z ##[command]git config --get-all http.proxy
2019-09-07T15:34:56.2426236Z ##[command]git -c http.extraheader="AUTHORIZATION: basic ***" fetch --force --tags --prune --progress --no-recurse-submodules --depth=2 origin +refs/heads/*:refs/remotes/origin/* +refs/pull/64256/merge:refs/remotes/pull/64256/merge
---
2019-09-07T15:42:10.5398561Z Compiling serde_json v1.0.40
2019-09-07T15:42:12.5975715Z Compiling tidy v0.1.0 (/checkout/src/tools/tidy)
2019-09-07T15:42:24.6718538Z Finished release [optimized] target(s) in 1m 39s
2019-09-07T15:42:24.6805222Z tidy check
2019-09-07T15:42:25.2558916Z tidy error: /checkout/src/test/codegen/c-variadic.rs:21: line longer than 100 chars
2019-09-07T15:42:25.2559996Z tidy error: /checkout/src/test/codegen/c-variadic.rs:23: line longer than 100 chars
2019-09-07T15:42:25.2560415Z tidy error: /checkout/src/test/codegen/c-variadic.rs:42: line longer than 100 chars
2019-09-07T15:42:25.2560733Z tidy error: /checkout/src/test/codegen/c-variadic.rs:48: line longer than 100 chars
2019-09-07T15:42:25.2560974Z tidy error: /checkout/src/test/codegen/c-variadic.rs:73: line longer than 100 chars
2019-09-07T15:42:26.8158687Z some tidy checks failed
2019-09-07T15:42:26.8164742Z 2019-09-07T15:42:26.8164742Z 2019-09-07T15:42:26.8166090Z command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/tidy" "/checkout/src" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "--no-vendor"
2019-09-07T15:42:26.8166260Z 2019-09-07T15:42:26.8166288Z 2019-09-07T15:42:26.8176653Z failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test src/tools/tidy
2019-09-07T15:42:26.8177139Z Build completed unsuccessfully in 0:01:42
2019-09-07T15:42:26.8177139Z Build completed unsuccessfully in 0:01:42
2019-09-07T15:42:26.8255846Z == clock drift check ==
2019-09-07T15:42:26.8275420Z local time: Sat Sep 7 15:42:26 UTC 2019
2019-09-07T15:42:26.9769425Z network time: Sat, 07 Sep 2019 15:42:26 GMT
2019-09-07T15:42:26.9769553Z == end clock drift check ==
2019-09-07T15:42:28.3739339Z ##[error]Bash exited with code '1'.
2019-09-07T15:42:28.3777151Z ##[section]Starting: Checkout
2019-09-07T15:42:28.3778885Z ==============================================================================
2019-09-07T15:42:28.3778939Z Task : Get sources
2019-09-07T15:42:28.3778983Z Description : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

[alexcrichton]

Seems reasonable to me to land, and the error should be fixable with // ignore-tidy-linelength on the file

[alexcrichton]

@bors: r+

[bors]

📌 Commit 2f6e73c has been approved by alexcrichton