[llvm] 995b61c - [SelectOpti] Auto-disable other cmov optis when the new select-opti pass is enabled
Sotiris Apostolakis via llvm-commits
llvm-commits at lists.llvm.org
Mon Aug 1 17:27:15 PDT 2022
Author: Sotiris Apostolakis
Date: 2022-08-02T00:19:59Z
New Revision: 995b61cdacaa944dd3021b3dd23a91da90136e07
URL: https://github.com/llvm/llvm-project/commit/995b61cdacaa944dd3021b3dd23a91da90136e07
DIFF: https://github.com/llvm/llvm-project/commit/995b61cdacaa944dd3021b3dd23a91da90136e07.diff
LOG: [SelectOpti] Auto-disable other cmov optis when the new select-opti pass is enabled
Reviewed By: davidxl
Differential Revision: https://reviews.llvm.org/D129817
Added:
Modified:
llvm/lib/CodeGen/CodeGenPrepare.cpp
llvm/lib/Target/X86/X86CmovConversion.cpp
Removed:
################################################################################
diff --git a/llvm/lib/CodeGen/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp
index b8f6fc9bbcde9..d5d08f04d4cd8 100644
--- a/llvm/lib/CodeGen/CodeGenPrepare.cpp
+++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp
@@ -6741,6 +6741,10 @@ bool CodeGenPrepare::optimizeSelectInst(SelectInst *SI) {
if (DisableSelectToBranch)
return false;
+ // If the SelectOptimize pass is enabled, selects have already been optimized.
+ if (!getCGPassBuilderOption().DisableSelectOptimize)
+ return false;
+
// Find all consecutive select instructions that share the same condition.
SmallVector<SelectInst *, 2> ASI;
ASI.push_back(SI);
diff --git a/llvm/lib/Target/X86/X86CmovConversion.cpp b/llvm/lib/Target/X86/X86CmovConversion.cpp
index f32891552a820..8016960681966 100644
--- a/llvm/lib/Target/X86/X86CmovConversion.cpp
+++ b/llvm/lib/Target/X86/X86CmovConversion.cpp
@@ -67,6 +67,7 @@
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/CGPassBuilderOption.h"
#include <algorithm>
#include <cassert>
#include <iterator>
@@ -167,6 +168,10 @@ bool X86CmovConverterPass::runOnMachineFunction(MachineFunction &MF) {
if (!EnableCmovConverter)
return false;
+ // If the SelectOptimize pass is enabled, cmovs have already been optimized.
+ if (!getCGPassBuilderOption().DisableSelectOptimize)
+ return false;
+
LLVM_DEBUG(dbgs() << "********** " << getPassName() << " : " << MF.getName()
<< "**********\n");
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