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