efriedma added inline comments.

================
Comment at: test/CodeGen/builtin-constant-p.c:2
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s -O2 | 
FileCheck --check-prefix=O2 %s
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s -O0 | 
FileCheck --check-prefix=O0 %s
 
----------------
efriedma wrote:
> void wrote:
> > efriedma wrote:
> > > Given this code doesn't check the optimization level anymore, do you 
> > > still need separate check prefixes for `O2` and `O0`.  Or if that doesn't 
> > > work for everything, maybe you could share a check prefix for some of the 
> > > tests? (Maybe it would make sense to check IR generated using 
> > > `-disable-llvm-passes`.)
> > The bug only triggered at `O0`, so I still want to test it without 
> > optimizations. Note that we do check optimization levels during code 
> > generation to determine if we should generate an `is.constant` intrinsic.
> You can use something like "-check-prefixes=CHECK,O0" to reduce the 
> duplication.
That doesn't pass.

More specifically, I was thinking something more along the lines of using 
"--check-prefixes=CHECK,O2" for the first run, and "--check-prefixes=CHECK,O0" 
for the second run; then you can use "CHECK:" for the common lines and 
"O2:"/"O0:" for the lines that are different.


Repository:
  rC Clang

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D55616/new/

https://reviews.llvm.org/D55616



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