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With the 32-bit SVR4 ABI we don't have a red zone, so we have to restore the callee-saved registers before we restore the stack pointer. The previous fix for this PR failed in two ways, for huge frames: first, we use a negative offset from r11 in that case, so the (mem:BLK 11) access does no good; second, sched does not handle accesses to mem:BLK correctly in this case (does not make dependencies). This patch fixes it by doing a store to (mem:BLK (scratch)) instead. This means no unrelated (not to stack) loads/stores can be moved over the stack restore either, but so be it. PR target/77687 * config/rs6000/rs6000.md (stack_restore_tie): Store to a scratch address instead of to r1 and r11. gcc/testsuite/ PR target/77687 * gcc.target/powerpc/pr77687.c: New testcase. From-SVN: r253033
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