On Sun, 2022-07-10 at 10:20 +0800, Lulu Cheng wrote:
>
> 在 2022/7/7 上午10:23, Xi Ruoyao 写道:
> > We were generating some unnecessary instructions for integer
> > division.
> > These two patches improve the code generation to compile
> >
> > template <class T> T div(T a, T b) { return a / b; }
> >
> > into a single division instruction (along with a return instruction
> > of
> > course) as we expected for T in {int32_t, uint32_t, int64_t}.
> >
> > Bootstrapped and regtested on loongarch64-linux-gnu. Ok for trunk?
> >
> > Xi Ruoyao (2):
> > loongarch: add alternatives for idiv insns to improve code
> > generation
> > loongarch: avoid unnecessary sign-extend after 32-bit division
> >
> > gcc/config/loongarch/loongarch-protos.h | 1 +
> > gcc/config/loongarch/loongarch.cc | 2 +-
> > gcc/config/loongarch/loongarch.md | 34 ++++++++++++++++--
> > ----
> > gcc/testsuite/gcc.target/loongarch/div-1.c | 9 ++++++
> > gcc/testsuite/gcc.target/loongarch/div-2.c | 9 ++++++
> > gcc/testsuite/gcc.target/loongarch/div-3.c | 9 ++++++
> > gcc/testsuite/gcc.target/loongarch/div-4.c | 9 ++++++
> > 7 files changed, 63 insertions(+), 10 deletions(-)
> > create mode 100644 gcc/testsuite/gcc.target/loongarch/div-1.c
> > create mode 100644 gcc/testsuite/gcc.target/loongarch/div-2.c
> > create mode 100644 gcc/testsuite/gcc.target/loongarch/div-3.c
> > create mode 100644 gcc/testsuite/gcc.target/loongarch/div-4.c
> >
> LGTM and spec has been tested.
>
> Thanks!
Pushed r13-1592 and r13-1593.
--
Xi Ruoyao <xry...@xry111.site>
School of Aerospace Science and Technology, Xidian University
