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llvm-project/llvm/test/CodeGen/RISCV/interrupt-attr-ret-error.ll

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[RISCV] Add support for _interrupt attribute - Save/restore only registers that are used. This includes Callee saved registers and Caller saved registers (arguments and temporaries) for integer and FP registers. - If there is a call in the interrupt handler, save/restore all Caller saved registers (arguments and temporaries) and all FP registers. - Emit special return instructions depending on "interrupt" attribute type. Based on initial patch by Zhaoshi Zheng. Reviewers: asb Reviewed By: asb Subscribers: rkruppe, the_o, MartinMosbeck, brucehoult, rbar, johnrusso, simoncook, sabuasal, niosHD, kito-cheng, shiva0217, zzheng, edward-jones, mgrang, rogfer01, llvm-commits Differential Revision: https://reviews.llvm.org/D48411 llvm-svn: 338047
2018-07-27 01:49:43 +08:00
; RUN: not llc -mtriple riscv32-unknown-elf -o - %s \
; RUN: 2>&1 | FileCheck %s
; RUN: not llc -mtriple riscv64-unknown-elf -o - %s \
; RUN: 2>&1 | FileCheck %s
; CHECK: LLVM ERROR: Functions with the interrupt attribute must have void return type!
define i32 @isr1_user() #0 {
ret i32 0
}
attributes #0 = { "interrupt"="user" }