[Bug target/91769] [9 regression] wrong code with -O2 on MIPS

[aurelien at aurel32 dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91769

--- Comment #3 from Aurelien Jarno <aurelien at aurel32 dot net> ---
This is the change introduced by the commit:

--- gnuplot-testcase.s.r269878
+++ gnuplot-testcase.s.r269880
@@ -73,8 +73,7 @@
        lw      $3,12($3)
        .loc 1 37 15 view $LVU16
        ldc1    $f2,64($sp)
-       mtc1    $2,$f0
-       mtc1    $3,$f1
+       ldc1    $f0,8($3)
        c.le.d  $fcc5,$f0,$f2
        bc1t    $fcc5,$L28
        mov.d   $f0,$f2