[llvm] [RISCV] Support Push/Pop with Xqci (PR #134191)

[Sam Elliott via llvm-commits]

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@@ -1435,8 +1414,7 @@ define void @test_spill_nest() "interrupt"="qci-nest" {
 ; QCI-PUSH-POP-NEXT:    .cfi_restore s9
 ; QCI-PUSH-POP-NEXT:    .cfi_restore s10
 ; QCI-PUSH-POP-NEXT:    .cfi_restore s11
-; QCI-PUSH-POP-NEXT:    addi sp, sp, 80
-; QCI-PUSH-POP-NEXT:    .cfi_def_cfa_offset 96
+; QCI-PUSH-POP-NEXT:    .cfi_def_cfa_offset 0
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lenary wrote:

This looks wrong. I'll inspect this in the morning.

https://github.com/llvm/llvm-project/pull/134191