https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93876
Bug ID: 93876
Summary: [9 10 Regression] [SH] webkit2gtk fails to build with
"error: unable to find a register to spill in class
'R0_REGS'"
Product: gcc
Version: 9.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: glaubitz at physik dot fu-berlin.de
CC: gcc-bugzilla at mkarcher dot dialup.fu-berlin.de,
jrtc27 at jrtc27 dot com, kkojima at gcc dot gnu.org,
olegendo at gcc dot gnu.org
Target Milestone: ---
Target: sh*-*-*
Trying to build webkit2gtk on Debian sh4 with gcc-9/gcc-10 fails with:
../Source/JavaScriptCore/runtime/JSArrayBufferView.cpp: In member function
'JSC::ArrayBuffer* JSC::JSArrayBufferView::slowDownAndWasteMemory()':
../Source/JavaScriptCore/runtime/JSArrayBufferView.cpp:298:1: error: unable to
find a register to spill in class 'R0_REGS'
298 | }
| ^
../Source/JavaScriptCore/runtime/JSArrayBufferView.cpp:298:1: error: this is
the insn:
(insn 419 418 425 47 (parallel [
(set (subreg:SI (reg:QI 433) 0)
(unspec_volatile:SI [
(mem/v:QI (reg/f:SI 3 r3 [orig:487 _347 ] [487]) [-1
S1 A8])
(reg:QI 7 r7 [425])
(subreg:QI (reg:SI 5 r5 [432]) 0)
] UNSPECV_CMPXCHG_1))
(set (mem/v:QI (reg/f:SI 3 r3 [orig:487 _347 ] [487]) [-1 S1 A8])
(unspec_volatile:QI [
(const_int 0 [0])
] UNSPECV_CMPXCHG_2))
(set (reg:SI 147 t)
(unspec_volatile:SI [
(const_int 0 [0])
] UNSPECV_CMPXCHG_3))
(clobber (scratch:SI))
(clobber (reg:SI 0 r0))
(clobber (reg:SI 1 r1))
]) "/usr/include/c++/10/bits/atomic_base.h":464:36 405
{atomic_compare_and_swapqi_soft_gusa}
(expr_list:REG_DEAD (reg:SI 5 r5 [432])
(expr_list:REG_DEAD (reg:QI 7 r7 [425])
(expr_list:REG_UNUSED (reg:QI 433)
(expr_list:REG_UNUSED (reg:SI 1 r1)
(expr_list:REG_UNUSED (reg:SI 0 r0)
(nil)))))))
../Source/JavaScriptCore/runtime/JSArrayBufferView.cpp:298: confused by earlier
errors, bailing out
