The attached series of patches improve code-generation for MSP430 shift instructions. The first two patches are changes to generic areas of GCC, required for the 3rd patch to have the desired effect.
Successfully regtested on trunk for x86_64-pc-linux-gnu (for the generic changes) and msp430-elf. Ok to apply? Jozef Lawrynowicz (3): expr: Allow scalar_int_mode target mode when converting a constant expmed: Fix possible use of NULL_RTX return value from emit_store_flag MSP430: Simplify and extend shift instruction patterns gcc/config/msp430/constraints.md | 10 +- gcc/config/msp430/msp430-protos.h | 6 +- gcc/config/msp430/msp430.c | 272 +++++++++---- gcc/config/msp430/msp430.md | 381 +++++------------- gcc/config/msp430/msp430.opt | 6 + gcc/config/msp430/predicates.md | 13 +- gcc/doc/invoke.texi | 15 +- gcc/expmed.c | 34 +- gcc/expr.c | 2 +- .../gcc.target/msp430/emulate-srli.c | 2 +- .../msp430/max-inline-shift-430-no-opt.c | 52 +++ .../gcc.target/msp430/max-inline-shift-430.c | 50 +++ .../gcc.target/msp430/max-inline-shift-430x.c | 48 +++ libgcc/config/msp430/slli.S | 15 + libgcc/config/msp430/srai.S | 15 + libgcc/config/msp430/srli.S | 16 + 16 files changed, 548 insertions(+), 389 deletions(-) create mode 100644 gcc/testsuite/gcc.target/msp430/max-inline-shift-430-no-opt.c create mode 100644 gcc/testsuite/gcc.target/msp430/max-inline-shift-430.c create mode 100644 gcc/testsuite/gcc.target/msp430/max-inline-shift-430x.c -- 2.27.0
