forked from OSchip/llvm-project
66 lines
1.9 KiB
LLVM
66 lines
1.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s \
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; RUN: | FileCheck %s -check-prefix=RV32I
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declare void @notdead(i8*)
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; These tests must ensure the stack pointer is restored using the frame
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; pointer
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define void @simple_alloca(i32 %n) nounwind {
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; RV32I-LABEL: simple_alloca:
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; RV32I: # %bb.0:
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; RV32I-NEXT: addi sp, sp, -16
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; RV32I-NEXT: sw ra, 12(sp)
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; RV32I-NEXT: sw s0, 8(sp)
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; RV32I-NEXT: addi s0, sp, 16
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; RV32I-NEXT: addi a0, a0, 15
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; RV32I-NEXT: andi a0, a0, -16
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; RV32I-NEXT: sub a0, sp, a0
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; RV32I-NEXT: mv sp, a0
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; RV32I-NEXT: lui a1, %hi(notdead)
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; RV32I-NEXT: addi a1, a1, %lo(notdead)
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; RV32I-NEXT: jalr a1
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; RV32I-NEXT: addi sp, s0, -16
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; RV32I-NEXT: lw s0, 8(sp)
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; RV32I-NEXT: lw ra, 12(sp)
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; RV32I-NEXT: addi sp, sp, 16
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; RV32I-NEXT: ret
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%1 = alloca i8, i32 %n
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call void @notdead(i8* %1)
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ret void
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}
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declare i8* @llvm.stacksave()
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declare void @llvm.stackrestore(i8*)
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define void @scoped_alloca(i32 %n) nounwind {
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; RV32I-LABEL: scoped_alloca:
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; RV32I: # %bb.0:
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; RV32I-NEXT: addi sp, sp, -16
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; RV32I-NEXT: sw ra, 12(sp)
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; RV32I-NEXT: sw s0, 8(sp)
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; RV32I-NEXT: sw s1, 4(sp)
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; RV32I-NEXT: addi s0, sp, 16
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; RV32I-NEXT: mv s1, sp
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; RV32I-NEXT: addi a0, a0, 15
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; RV32I-NEXT: andi a0, a0, -16
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; RV32I-NEXT: sub a0, sp, a0
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; RV32I-NEXT: mv sp, a0
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; RV32I-NEXT: lui a1, %hi(notdead)
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; RV32I-NEXT: addi a1, a1, %lo(notdead)
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; RV32I-NEXT: jalr a1
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; RV32I-NEXT: mv sp, s1
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; RV32I-NEXT: addi sp, s0, -16
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; RV32I-NEXT: lw s1, 4(sp)
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; RV32I-NEXT: lw s0, 8(sp)
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; RV32I-NEXT: lw ra, 12(sp)
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; RV32I-NEXT: addi sp, sp, 16
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; RV32I-NEXT: ret
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%sp = call i8* @llvm.stacksave()
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%addr = alloca i8, i32 %n
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call void @notdead(i8* %addr)
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call void @llvm.stackrestore(i8* %sp)
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ret void
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}
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