[Bug target/96015] [10/11 Regression] gcc-10.1.0 miscompiles Python on hppa

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96015

--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
There's ASM diff in between GCC 9 and 10 version:

diff -u good.s bad.s
--- good.s      2020-07-01 15:04:58.315839436 +0200
+++ bad.s       2020-07-01 15:04:30.684040487 +0200
@@ -30,7 +30,7 @@
 .L15:
        ldi 0,%r28
 .L3:
-.L25:
+.L26:
        ldw -84(%r30),%r2
        ldw -60(%r30),%r4
        ldw -56(%r30),%r3
@@ -39,16 +39,14 @@
 .L22:
        bl yes,%r2
        nop
-       comib,=,n 0,%r28,.L25
+       comib,=,n 0,%r28,.L26
        ldi 0,%r28
-       comclr,<> %r4,%r5,%r0
-       b,n .L23
        comiclr,<< 5,%r3,%r0
-       b,n .L24
-.L6:
-.L23:
-       comib,<< 5,%r3,.L26
+       b,n .L25
+.L12:
+       b .L3
        ldi 1,%r28
+.L25:
        ldil L'.L8,%r28
        ldo R'.L8(%r28),%r28
        ldwx,s %r3(%r28),%r28
@@ -65,34 +63,6 @@
        .word .L12
        .end_brtab
        .text
-.L12:
-       ldi 1,%r28
-.L26:
-       ldw -84(%r30),%r2
-       ldw -60(%r30),%r4
-       ldw -56(%r30),%r3
-       bv %r0(%r2)
-       ldwm -64(%r30),%r5
-.L24:
-       ldil L'.L11,%r28
-       ldo R'.L11(%r28),%r28
-       ldwx,s %r3(%r28),%r28
-       bv,n %r0(%r28)
-       .section        .rodata
-       .align 4
-.L11:
-       .begin_brtab
-       .word .L14
-       .word .L15
-       .word .L6
-       .word .L15
-       .word .L6
-       .word .L15
-       .end_brtab
-       .text
-.L14:
-       b .L3
-       copy %r3,%r28
        .EXIT
        .PROCEND
        .size   long_richcompare, .-long_richcompare
@@ -143,4 +113,4 @@
        .EXIT
        .PROCEND
        .size   main, .-main
-       .ident  "GCC: (SUSE Linux) 9.3.1 20200406 [revision
6db837a5288ee3ca5ec504fbd5a765817e556ac2]"
+       .ident  "GCC: (SUSE Linux) 10.1.1 20200625 [revision
c91e43e9363bd119a695d64505f96539fa451bf2]"