gcc: xtensa: reorder movsi_internal patterns for better code generation during LRA

After switching to LRA xtensa backend generates the following code for
saving/loading registers:

    movi     a9, 0x190
    add      a9, a9, sp
    s32i.n   a3, a9, 0

instead of the shorter and more efficient

    s32i     a3, a9, 0x190

E.g. the following code can be used to reproduce it:

    int f1(int a, int b, int c, int d, int e, int f, int *p);
    int f2(int a, int b, int c, int d, int e, int f, int *p);
    int f3(int a, int b, int c, int d, int e, int f, int *p);

    int foo(int a, int b, int c, int d, int e, int f)
    {
        int g[100];
        return
            f1(a, b, c, d, e, f, g) +
            f2(a, b, c, d, e, f, g) +
            f3(a, b, c, d, e, f, g);
    }

This happens in the LRA pass because s32i.n and l32i.n are listed before
the s32i and l32i in the movsi_internal pattern and alternative
consideration loop stops early.

gcc/

	* config/xtensa/xtensa.md (movsi_internal): Move l32i and s32i
	patterns ahead of the l32i.n and s32i.n.

0 files changed, 0 insertions, 0 deletions