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Move some of the test information to TIP lines (#4007)
This has is a nice-to-have for me. Frequently I want to run a specific test, and end up digging through output to be able to copy-paste the run line. This uses TIP lines to inject the command into the file when using AUTOUPDATE. Note, one of the reasons I want this is because "bazel test //toolchain/testing:file_test --test_output=all" has been regularly exceeding bazel's output limit for me (workaround is either opening the output file or specifying an obscure output limit flag), making it a little harder for me to get the commands. However, frequently I'm adding a file and want to iterate on it, so that's really the use case I have in mind here.
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@@ -3,6 +3,10 @@
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/function/declaration/param_same_name.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/function/declaration/param_same_name.carbon
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fn F(a: i32);
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@@ -29,19 +33,19 @@ fn G(a: i32);
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// CHECK:STDOUT: %Core: <namespace> = namespace [template] {}
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// CHECK:STDOUT: %import_ref.1: Int32 = import_ref ir3, inst+3, loaded [template = constants.%struct.1]
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// CHECK:STDOUT: %F.decl: F = fn_decl @F [template = constants.%struct.2] {
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// CHECK:STDOUT: %int.make_type_32.loc7: init type = call constants.%struct.1() [template = i32]
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// CHECK:STDOUT: %.loc7_9.1: type = value_of_initializer %int.make_type_32.loc7 [template = i32]
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// CHECK:STDOUT: %.loc7_9.2: type = converted %int.make_type_32.loc7, %.loc7_9.1 [template = i32]
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// CHECK:STDOUT: %a.loc7_6.1: i32 = param a
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// CHECK:STDOUT: @F.%a: i32 = bind_name a, %a.loc7_6.1
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// CHECK:STDOUT: %int.make_type_32.loc11: init type = call constants.%struct.1() [template = i32]
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// CHECK:STDOUT: %.loc11_9.1: type = value_of_initializer %int.make_type_32.loc11 [template = i32]
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// CHECK:STDOUT: %.loc11_9.2: type = converted %int.make_type_32.loc11, %.loc11_9.1 [template = i32]
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// CHECK:STDOUT: %a.loc11_6.1: i32 = param a
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// CHECK:STDOUT: @F.%a: i32 = bind_name a, %a.loc11_6.1
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %import_ref.2: Int32 = import_ref ir3, inst+3, loaded [template = constants.%struct.1]
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// CHECK:STDOUT: %G.decl: G = fn_decl @G [template = constants.%struct.3] {
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// CHECK:STDOUT: %int.make_type_32.loc9: init type = call constants.%struct.1() [template = i32]
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// CHECK:STDOUT: %.loc9_9.1: type = value_of_initializer %int.make_type_32.loc9 [template = i32]
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// CHECK:STDOUT: %.loc9_9.2: type = converted %int.make_type_32.loc9, %.loc9_9.1 [template = i32]
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// CHECK:STDOUT: %a.loc9_6.1: i32 = param a
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// CHECK:STDOUT: @G.%a: i32 = bind_name a, %a.loc9_6.1
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// CHECK:STDOUT: %int.make_type_32.loc13: init type = call constants.%struct.1() [template = i32]
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// CHECK:STDOUT: %.loc13_9.1: type = value_of_initializer %int.make_type_32.loc13 [template = i32]
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// CHECK:STDOUT: %.loc13_9.2: type = converted %int.make_type_32.loc13, %.loc13_9.1 [template = i32]
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// CHECK:STDOUT: %a.loc13_6.1: i32 = param a
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// CHECK:STDOUT: @G.%a: i32 = bind_name a, %a.loc13_6.1
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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