LEA code size optimization pass (Part 2): Remove redundant LEA instructions.
Make x86 OptimizeLEAs pass remove LEA instruction if there is another LEA
(in the same basic block) which calculates address differing only be a
displacement. Works only for -Oz.
Differential Revision: http://reviews.llvm.org/D13295
llvm-svn: 257589
diff --git a/llvm/lib/Target/X86/X86.h b/llvm/lib/Target/X86/X86.h
index e3d9528..01e65b8 100644
--- a/llvm/lib/Target/X86/X86.h
+++ b/llvm/lib/Target/X86/X86.h
@@ -54,7 +54,8 @@
/// instructions, in order to eliminate execution delays in some processors.
FunctionPass *createX86FixupLEAs();
-/// Return a pass that removes redundant address recalculations.
+/// Return a pass that removes redundant LEA instructions and redundant address
+/// recalculations.
FunctionPass *createX86OptimizeLEAs();
/// Return a pass that optimizes the code-size of x86 call sequences. This is