; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple riscv32-unknown-elf -o - %s \
; RUN: 2>&1 | FileCheck %s -check-prefix CHECK-RV32
; RUN: llc -mtriple riscv32-unknown-elf -mattr=+f -o - %s \
; RUN: 2>&1 | FileCheck %s -check-prefix CHECK-RV32-F
; RUN: llc -mtriple riscv32-unknown-elf -mattr=+f,+d -o - %s \
; RUN: 2>&1 | FileCheck %s -check-prefix CHECK-RV32-FD
;
; The test case check that the function call in an interrupt handler will use
; the correct CallPreservedMask as normal function. So only callee saved
; registers could live through the function call.
define dso_local void @handler() nounwind {
; CHECK-RV32-LABEL: handler:
; CHECK-RV32: # %bb.0: # %entry
; CHECK-RV32-NEXT: addi sp, sp, -16
; CHECK-RV32-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; CHECK-RV32-NEXT: sw s0, 8(sp) # 4-byte Folded Spill
; CHECK-RV32-NEXT: lui a0, 2
; CHECK-RV32-NEXT: addi a0, a0, 4
; CHECK-RV32-NEXT: call read
; CHECK-RV32-NEXT: mv s0, a0
; CHECK-RV32-NEXT: call callee
; CHECK-RV32-NEXT: mv a0, s0
; CHECK-RV32-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; CHECK-RV32-NEXT: lw s0, 8(sp) # 4-byte Folded Reload
; CHECK-RV32-NEXT: addi sp, sp, 16
; CHECK-RV32-NEXT: tail write
;
; CHECK-RV32-F-LABEL: handler:
; CHECK-RV32-F: # %bb.0: # %entry
; CHECK-RV32-F-NEXT: addi sp, sp, -16
; CHECK-RV32-F-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; CHECK-RV32-F-NEXT: sw s0, 8(sp) # 4-byte Folded Spill
; CHECK-RV32-F-NEXT: lui a0, 2
; CHECK-RV32-F-NEXT: addi a0, a0, 4
; CHECK-RV32-F-NEXT: call read
; CHECK-RV32-F-NEXT: mv s0, a0
; CHECK-RV32-F-NEXT: call callee
; CHECK-RV32-F-NEXT: mv a0, s0
; CHECK-RV32-F-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; CHECK-RV32-F-NEXT: lw s0, 8(sp) # 4-byte Folded Reload
; CHECK-RV32-F-NEXT: addi sp, sp, 16
; CHECK-RV32-F-NEXT: tail write
;
; CHECK-RV32-FD-LABEL: handler:
; CHECK-RV32-FD: # %bb.0: # %entry
; CHECK-RV32-FD-NEXT: addi sp, sp, -16
; CHECK-RV32-FD-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; CHECK-RV32-FD-NEXT: sw s0, 8(sp) # 4-byte Folded Spill
; CHECK-RV32-FD-NEXT: lui a0, 2
; CHECK-RV32-FD-NEXT: addi a0, a0, 4
; CHECK-RV32-FD-NEXT: call read
; CHECK-RV32-FD-NEXT: mv s0, a0
; CHECK-RV32-FD-NEXT: call callee
; CHECK-RV32-FD-NEXT: mv a0, s0
; CHECK-RV32-FD-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; CHECK-RV32-FD-NEXT: lw s0, 8(sp) # 4-byte Folded Reload
; CHECK-RV32-FD-NEXT: addi sp, sp, 16
; CHECK-RV32-FD-NEXT: tail write
entry:
%call = tail call i32 @read(i32 8196)
tail call void @callee()
tail call void @write(i32 %call)
ret void
}
declare i32 @read(i32)
declare void @callee(...)
declare void @write(i32)
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