From 83f176ba8a3bae5533470aed6a90663653f894b8 Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Wed, 29 May 2024 11:14:22 -0700
Subject: Add options to speedup compilation. (#4240)

* Add options to speedup compilation.

* Fix.

* Plumb options to DCE pass.

* Revert debug change.

* Fix regressions.

* More optimizations.

* more cleanup and fixes.

* remove comment.

* Fixes.

* Another fix.

* Fix errors.

* Fix errors.

* Add comments.
---
 source/slang/slang-ir-dce.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'source/slang/slang-ir-dce.cpp')

diff --git a/source/slang/slang-ir-dce.cpp b/source/slang/slang-ir-dce.cpp
index ec4c749fa..4eefeabd5 100644
--- a/source/slang/slang-ir-dce.cpp
+++ b/source/slang/slang-ir-dce.cpp
@@ -307,7 +307,11 @@ bool shouldInstBeLiveIfParentIsLive(IRInst* inst, IRDeadCodeEliminationOptions o
     // First, if `inst` is an instruction that might have some effects
     // when it is executed, then we should keep it around.
     //
-    if (inst->mightHaveSideEffects(SideEffectAnalysisOptions::UseDominanceTree))
+    SideEffectAnalysisOptions sideEffectOptions = options.useFastAnalysis
+        ? SideEffectAnalysisOptions::None
+        : SideEffectAnalysisOptions::UseDominanceTree;
+
+    if (inst->mightHaveSideEffects(sideEffectOptions))
     {
         return true;
     }
-- 
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