https://bugs.kde.org/show_bug.cgi?id=404843
--- Comment #1 from Andreas Arnez <ar...@linux.ibm.com> ---
The assembly of fun_b from the sample program above starts like this:
ldgr %f2,%r11
.cfi_register 11, 17
ldgr %f0,%r15
.cfi_register 15, 16
Which means that the entry values of r11 (frame pointer) and r15 (stack
pointer) must be retrieved from floating-point registers f2 and f0,
respectively. In leaf functions like this it is pretty common for newer GCCs
to spill general-purpose registers into floating-point registers.
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