Add a mechanism to skip a pass by name (#5448)

For example,

-O3 --skip-pass=vacuum

will run -O3 normally but it will not run the vacuum pass at all
(which normally runs more than once in -O3).

1 files changed, 8 insertions, 0 deletions

diff --git a/src/tools/optimization-options.h b/src/tools/optimization-options.h
index 698d3305e..c87530536 100644
--- a/src/tools/optimization-options.h
+++ b/src/tools/optimization-options.h
@@ -277,6 +277,14 @@ struct OptimizationOptions : public ToolOptions {
            Options::Arguments::Zero,
            [this](Options*, const std::string&) {
              passOptions.zeroFilledMemory = true;
+           })
+      .add("--skip-pass",
+           "-sp",
+           "Skip a pass (do not run it)",
+           OptimizationOptionsCategory,
+           Options::Arguments::One,
+           [this](Options*, const std::string& pass) {
+             passOptions.passesToSkip.insert(pass);
            });
 
     // add passes in registry