[experiment] Make ast::Expr larger

[petrochenkov]

A subset of #70091 for measuring performance effects.
r? @ghost

[petrochenkov]

@bors try @rust-timer queue

[rust-timer]

Awaiting bors try build completion

[bors]

⌛ Trying commit e189a6a with merge 438cf5fb7712745ef2c9d46c390725d57c31d532...

[rust-highfive]

The job x86_64-gnu-llvm-7 of your PR failed (pretty log, 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.

2020-03-20T20:45:38.3310430Z ========================== Starting Command Output ===========================
2020-03-20T20:45:38.3313975Z [command]/bin/bash --noprofile --norc /home/vsts/work/_temp/8b3cd783-f78f-4a28-b6f4-d52e7cbe7b3f.sh
2020-03-20T20:45:38.3314264Z 
2020-03-20T20:45:38.3318537Z ##[section]Finishing: Disable git automatic line ending conversion
2020-03-20T20:45:38.3338162Z ##[section]Starting: Checkout rust-lang/rust@refs/pull/70200/merge to s
2020-03-20T20:45:38.3341590Z Task         : Get sources
2020-03-20T20:45:38.3341916Z Description  : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
2020-03-20T20:45:38.3342231Z Version      : 1.0.0
2020-03-20T20:45:38.3342443Z Author       : Microsoft
---
2020-03-20T20:45:39.5657333Z ##[command]git remote add origin https://github.com/rust-lang/rust
2020-03-20T20:45:39.5669858Z ##[command]git config gc.auto 0
2020-03-20T20:45:39.5680220Z ##[command]git config --get-all http.https://github.com/rust-lang/rust.extraheader
2020-03-20T20:45:39.5689266Z ##[command]git config --get-all http.proxy
2020-03-20T20:45:39.5709150Z ##[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/70200/merge:refs/remotes/pull/70200/merge
---
2020-03-20T20:49:26.0550184Z Successfully built c61914066be7
2020-03-20T20:49:26.0597367Z Successfully tagged rust-ci:latest
2020-03-20T20:49:26.0858384Z Built container sha256:c61914066be78cfdfe996802f44ad70e26787b7c92b53f6ce1e59a4f33fbfba3
2020-03-20T20:49:26.0875303Z Uploading finished image to https://rust-lang-ci-sccache2.s3.amazonaws.com/docker/fc0b9a6e3051d635da7d94215f84d5e9794477aa0cb68449a3fa307fcd796c24419e8a5e04fb3ebd554f2f8d17623f528e7a0f3c6d8c2a3324e25c8632491b33
2020-03-20T20:50:14.4549807Z upload failed: - to s3://rust-lang-ci-sccache2/docker/fc0b9a6e3051d635da7d94215f84d5e9794477aa0cb68449a3fa307fcd796c24419e8a5e04fb3ebd554f2f8d17623f528e7a0f3c6d8c2a3324e25c8632491b33 An error occurred (InvalidAccessKeyId) when calling the CreateMultipartUpload operation: The AWS Access Key Id you provided does not exist in our records.
2020-03-20T20:50:14.9272509Z [CI_JOB_NAME=x86_64-gnu-llvm-7]
2020-03-20T20:50:14.9323688Z == clock drift check ==
2020-03-20T20:50:14.9334562Z   local time: Fri Mar 20 20:50:14 UTC 2020
2020-03-20T20:50:15.0972087Z   network time: Fri, 20 Mar 2020 20:50:15 GMT
---
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---
2020-03-20T21:54:52.8567934Z Suite("src/test/codegen") not skipped for "bootstrap::test::Codegen" -- not in ["src/tools/tidy"]
2020-03-20T21:54:52.8755997Z Check compiletest suite=codegen mode=codegen (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2020-03-20T21:54:53.0951936Z 
2020-03-20T21:54:53.0952934Z running 183 tests
2020-03-20T21:54:55.9823261Z iiii......i............ii.i..iiii....i....i...........i.............i.i..................i....i..... 100/183
2020-03-20T21:54:58.5533852Z .......i.i.i...iii..iiiiiiiiiiiiiiii.......................iii.............ii......
2020-03-20T21:54:58.5536717Z 
2020-03-20T21:54:58.5536906Z  finished in 5.677
2020-03-20T21:54:58.5540931Z Suite("src/test/codegen-units") not skipped for "bootstrap::test::CodegenUnits" -- not in ["src/tools/tidy"]
2020-03-20T21:54:58.5727622Z Check compiletest suite=codegen-units mode=codegen-units (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
---
2020-03-20T21:55:00.7756867Z Suite("src/test/assembly") not skipped for "bootstrap::test::Assembly" -- not in ["src/tools/tidy"]
2020-03-20T21:55:00.7950342Z Check compiletest suite=assembly mode=assembly (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2020-03-20T21:55:00.9523886Z 
2020-03-20T21:55:00.9524226Z running 9 tests
2020-03-20T21:55:00.9525367Z iiiiiiiii
2020-03-20T21:55:00.9526769Z 
2020-03-20T21:55:00.9531569Z  finished in 0.158
2020-03-20T21:55:00.9539933Z Suite("src/test/incremental") not skipped for "bootstrap::test::Incremental" -- not in ["src/tools/tidy"]
2020-03-20T21:55:00.9731523Z Check compiletest suite=incremental mode=incremental (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
---
2020-03-20T21:55:21.2813521Z Suite("src/test/debuginfo") not skipped for "bootstrap::test::Debuginfo" -- not in ["src/tools/tidy"]
2020-03-20T21:55:21.3071191Z Check compiletest suite=debuginfo mode=debuginfo (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2020-03-20T21:55:21.5249830Z 
2020-03-20T21:55:21.5250108Z running 115 tests
2020-03-20T21:55:34.8961676Z iiiii..i.....i..i...i..i.i.i..i..i..ii....i.i....ii..........iiii.........i.....i..i.......ii.i.ii.. 100/115
2020-03-20T21:55:36.4433196Z ...iiii.....ii.
2020-03-20T21:55:36.4435424Z 
2020-03-20T21:55:36.4440831Z  finished in 15.137
2020-03-20T21:55:36.4447584Z Suite("src/test/ui-fulldeps") not skipped for "bootstrap::test::UiFullDeps" -- not in ["src/tools/tidy"]
2020-03-20T21:55:36.4450842Z Uplifting stage1 rustc (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
---
2020-03-20T21:56:05.1565660Z ---- [ui] ui-fulldeps/pprust-expr-roundtrip.rs stdout ----
2020-03-20T21:56:05.1565882Z 
2020-03-20T21:56:05.1566326Z error: test compilation failed although it shouldn't!
2020-03-20T21:56:05.1566608Z status: exit code: 1
2020-03-20T21:56:05.1568610Z command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui-fulldeps/pprust-expr-roundtrip.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui-fulldeps/pprust-expr-roundtrip/a" "-Crpath" "-O" "-Cdebuginfo=0" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui-fulldeps/pprust-expr-roundtrip/auxiliary"
2020-03-20T21:56:05.1570273Z ------------------------------------------
2020-03-20T21:56:05.1570477Z 
2020-03-20T21:56:05.1570851Z ------------------------------------------
2020-03-20T21:56:05.1571065Z stderr:
---
2020-03-20T21:56:05.1578384Z test result: FAILED. 63 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out
2020-03-20T21:56:05.1578666Z 
2020-03-20T21:56:05.1578959Z 
2020-03-20T21:56:05.1579142Z 
2020-03-20T21:56:05.1583164Z command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/compiletest" "--compile-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib" "--run-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/x86_64-unknown-linux-gnu/lib" "--rustc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "--src-base" "/checkout/src/test/ui-fulldeps" "--build-base" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui-fulldeps" "--stage-id" "stage2-x86_64-unknown-linux-gnu" "--mode" "ui" "--target" "x86_64-unknown-linux-gnu" "--host" "x86_64-unknown-linux-gnu" "--llvm-filecheck" "/usr/lib/llvm-7/bin/FileCheck" "--nodejs" "/usr/bin/node" "--host-rustcflags" "-Crpath -O -Cdebuginfo=0 -Zunstable-options  -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--target-rustcflags" "-Crpath -O -Cdebuginfo=0 -Zunstable-options  -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--docck-python" "/usr/bin/python2.7" "--lldb-python" "/usr/bin/python2.7" "--gdb" "/usr/bin/gdb" "--quiet" "--llvm-version" "7.0.0\n" "--system-llvm" "--cc" "" "--cxx" "" "--cflags" "" "--llvm-components" "" "--adb-path" "adb" "--adb-test-dir" "/data/tmp/work" "--android-cross-path" "" "--color" "always"
2020-03-20T21:56:05.1587503Z 
2020-03-20T21:56:05.1587611Z 
2020-03-20T21:56:05.1588206Z thread 'main' panicked at 'Some tests failed', src/tools/compiletest/src/main.rs:348:22
2020-03-20T21:56:05.1588665Z note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
2020-03-20T21:56:05.1588665Z note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
2020-03-20T21:56:05.1593969Z failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test --exclude src/tools/tidy
2020-03-20T21:56:05.1594615Z Build completed unsuccessfully in 1:04:00
2020-03-20T21:56:05.1622782Z == clock drift check ==
2020-03-20T21:56:05.1644103Z   local time: Fri Mar 20 21:56:05 UTC 2020
2020-03-20T21:56:05.4605649Z   network time: Fri, 20 Mar 2020 21:56:05 GMT
2020-03-20T21:56:05.4606225Z == end clock drift check ==
2020-03-20T21:56:06.3810911Z 
2020-03-20T21:56:06.3920058Z ##[error]Bash exited with code '1'.
2020-03-20T21:56:06.3944146Z ##[section]Finishing: Run build
2020-03-20T21:56:06.4006718Z ##[section]Starting: Checkout rust-lang/rust@refs/pull/70200/merge to s
2020-03-20T21:56:06.4012763Z Task         : Get sources
2020-03-20T21:56:06.4013152Z Description  : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
2020-03-20T21:56:06.4013493Z Version      : 1.0.0
2020-03-20T21:56:06.4013737Z Author       : Microsoft
2020-03-20T21:56:06.4013737Z Author       : Microsoft
2020-03-20T21:56:06.4014148Z Help         : [More Information](https://go.microsoft.com/fwlink/?LinkId=798199)
2020-03-20T21:56:06.4014583Z ==============================================================================
2020-03-20T21:56:06.7425481Z Cleaning any cached credential from repository: rust-lang/rust (GitHub)
2020-03-20T21:56:06.7488702Z ##[section]Finishing: Checkout rust-lang/rust@refs/pull/70200/merge to s
2020-03-20T21:56:06.7585244Z Cleaning up task key
2020-03-20T21:56:06.7586608Z Start cleaning up orphan processes.
2020-03-20T21:56:06.7766746Z Terminate orphan process: pid (3590) (python)
2020-03-20T21:56:06.7995636Z ##[section]Finishing: Finalize Job

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[bors]

☀️ Try build successful - checks-azure
Build commit: 438cf5fb7712745ef2c9d46c390725d57c31d532 (438cf5fb7712745ef2c9d46c390725d57c31d532)

[rust-timer]

Queued 438cf5fb7712745ef2c9d46c390725d57c31d532 with parent 2835ca6, future comparison URL.

[Aaron1011]

@petrochenkov: This looks like noise. It seems as though the calls to collect_tokens are causing the slowdown in #70091