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[X86] Enable compilation of user interrupt handlers.

Authored by pengfei on Apr 22 2021, 8:12 PM.

Description

[X86] Enable compilation of user interrupt handlers.

Add __uintr_frame structure and use UIRET instruction for functions with
x86 interrupt calling convention when UINTR is present.

Reviewed By: LuoYuanke

Differential Revision: https://reviews.llvm.org/D99708

Details

Committed
pengfeiApr 22 2021, 8:43 PM
Reviewer
LuoYuanke
Differential Revision
D99708: [X86] Enable compilation of user interrupt handlers.
Parents
rG14cc1cb22230: [RISCV] Implement the vneg.v builtin.
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