[mips][microMIPS] Adding code size reduction pass for MicroMIPS

Author: milena.vujosevic.janicic
Reviewers: sdardis
The code implements size reduction pass for MicroMIPS.
Load and store instructions are examined and transformed, if possible.
lw32 instruction is transformed into 16-bit instruction lwsp
sw32 instruction is transformed into 16-bit instruction swsp
Arithmetic instrcutions are examined and transformed, if possible.
addu32 instruction is transformed into 16-bit instruction addu16
subu32 instruction is transformed into 16-bit instruction subu16
Differential Revision: https://reviews.llvm.org/D15144

llvm-svn: 301540

1 files changed, 1 insertions, 0 deletions

diff --git a/llvm/lib/Target/Mips/Mips.h b/llvm/lib/Target/Mips/Mips.h
index d9faf3325ca..7553f3972f5 100644
--- a/llvm/lib/Target/Mips/Mips.h
+++ b/llvm/lib/Target/Mips/Mips.h
@@ -32,6 +32,7 @@ namespace llvm {
   FunctionPass *createMipsHazardSchedule();
   FunctionPass *createMipsLongBranchPass(MipsTargetMachine &TM);
   FunctionPass *createMipsConstantIslandPass();
+  FunctionPass *createMicroMipsSizeReductionPass();
 } // end namespace llvm;
 
 #endif