[PATCH] D55616: Emit ASM input in a constant context

Bill Wendling via Phabricator via cfe-commits cfe-commits at lists.llvm.org
Tue Dec 18 14:57:38 PST 2018

void marked an inline comment as done.
void 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:
> 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.
I think think that works. The thing is that there should rarely be common lines between `O2` and `O0`. I understand what you're going for here, but I don't think it's beneficial to this testcase. However, I don't need to change all of the `CHECK`s either. I came up with a compromise...

  rC Clang



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