jrtc27 added inline comments.

================
Comment at: clang/test/C/C2x/n2683_2.c:7-15
+// CHECK:    %result64 = alloca i64, align 8
+// CHECK:    %flag_add = alloca i8, align 1
+// CHECK:    store i64 0, ptr %result64, align 8
+// CHECK:    %0 = call { i64, i1 } @llvm.sadd.with.overflow.i64(i64 
2147483647, i64 1)
+// CHECK:    %1 = extractvalue { i64, i1 } %0, 1 
+// CHECK:    %2 = extractvalue { i64, i1 } %0, 0
+// CHECK:    store i64 %2, ptr %result64, align 8
----------------
aaron.ballman wrote:
> Sorry for not spotting this sooner, but when emitting LLVM IR, these `%ident` 
> identifiers are sometimes replaced with different text depending on how the 
> bot is set up. e.g., one bot may use `%result64` while another bot may decide 
> to name it `%0`. The way we usually handle this is to use a feature from 
> FileCheck that lets you name a regex pattern and then use that. I showed some 
> examples of how to capture the name and how to use the name as a replacement 
> above, but I'll leave it to you to do the rest of the changes. You should do 
> this for anything starting with `%` in this file and in 
> clang/test/Headers/stdckdint.c.
Or just use update_cc_test_checks.py and let it do that for you? These tests 
don't look like they do anything weird that the UTC scripts won't like.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D157331/new/

https://reviews.llvm.org/D157331

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