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authorAlexey Bataev <a.bataev@hotmail.com>2015-12-17 07:34:39 +0000
committerAlexey Bataev <a.bataev@hotmail.com>2015-12-17 07:34:39 +0000
commit7b72b658cc9bf083d413fa34863eee956c3d03eb (patch)
tree50bbcccf60a1ac2757620f4143c2a98e118083af /llvm/lib/Target
parent8fbad24d1820d18b8929d28d73a20be0fea31028 (diff)
downloadbcm5719-llvm-7b72b658cc9bf083d413fa34863eee956c3d03eb.tar.gz
bcm5719-llvm-7b72b658cc9bf083d413fa34863eee956c3d03eb.zip
[X86] Add option for enabling LEA optimization pass, by Andrey Turetsky
Add option to enable/disable LEA optimization pass. By default the pass is disabled. Differential Revision: http://reviews.llvm.org/D15573 llvm-svn: 255881
Diffstat (limited to 'llvm/lib/Target')
-rw-r--r--llvm/lib/Target/X86/X86OptimizeLEAs.cpp6
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/X86OptimizeLEAs.cpp b/llvm/lib/Target/X86/X86OptimizeLEAs.cpp
index da83c8ad824..58020d909a4 100644
--- a/llvm/lib/Target/X86/X86OptimizeLEAs.cpp
+++ b/llvm/lib/Target/X86/X86OptimizeLEAs.cpp
@@ -33,6 +33,10 @@ using namespace llvm;
#define DEBUG_TYPE "x86-optimize-LEAs"
+static cl::opt<bool> EnableX86LEAOpt("enable-x86-lea-opt", cl::Hidden,
+ cl::desc("X86: Enable LEA optimizations."),
+ cl::init(false));
+
STATISTIC(NumSubstLEAs, "Number of LEA instruction substitutions");
namespace {
@@ -296,7 +300,7 @@ bool OptimizeLEAPass::runOnMachineFunction(MachineFunction &MF) {
bool Changed = false;
// Perform this optimization only if we care about code size.
- if (!MF.getFunction()->optForSize())
+ if (!EnableX86LEAOpt || !MF.getFunction()->optForSize())
return false;
MRI = &MF.getRegInfo();
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