diff options
| -rw-r--r-- | lib/Transforms/Scalar/LICM.cpp | 12 | ||||
| -rw-r--r-- | test/Transforms/LICM/2008-07-22-LoadGlobalConstant.ll | 2 |
2 files changed, 2 insertions, 12 deletions
diff --git a/lib/Transforms/Scalar/LICM.cpp b/lib/Transforms/Scalar/LICM.cpp index 104c8739c0..a71b3e31e2 100644 --- a/lib/Transforms/Scalar/LICM.cpp +++ b/lib/Transforms/Scalar/LICM.cpp @@ -63,15 +63,6 @@ static cl::opt<bool> DisablePromotion("disable-licm-promotion", cl::Hidden, cl::desc("Disable memory promotion in LICM pass")); -// This feature is currently disabled by default because CodeGen is not yet -// capable of rematerializing these constants in PIC mode, so it can lead to -// degraded performance. Compile test/CodeGen/X86/remat-constant.ll with -// -relocation-model=pic to see an example of this. -static cl::opt<bool> -EnableLICMConstantMotion("enable-licm-constant-variables", cl::Hidden, - cl::desc("Enable hoisting/sinking of constant " - "global variables")); - namespace { struct LICM : public LoopPass { static char ID; // Pass identification, replacement for typeid @@ -383,8 +374,7 @@ bool LICM::canSinkOrHoistInst(Instruction &I) { // Loads from constant memory are always safe to move, even if they end up // in the same alias set as something that ends up being modified. - if (EnableLICMConstantMotion && - AA->pointsToConstantMemory(LI->getOperand(0))) + if (AA->pointsToConstantMemory(LI->getOperand(0))) return true; // Don't hoist loads which have may-aliased stores in loop. diff --git a/test/Transforms/LICM/2008-07-22-LoadGlobalConstant.ll b/test/Transforms/LICM/2008-07-22-LoadGlobalConstant.ll index 723440f101..10b00bab8f 100644 --- a/test/Transforms/LICM/2008-07-22-LoadGlobalConstant.ll +++ b/test/Transforms/LICM/2008-07-22-LoadGlobalConstant.ll @@ -1,4 +1,4 @@ -; RUN: opt < %s -licm -enable-licm-constant-variables -S | FileCheck %s +; RUN: opt < %s -licm -S | FileCheck %s @a = external constant float* |