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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s \
; RUN: | FileCheck %s -check-prefix=RV32I
declare void @notdead(i8*)
; These tests must ensure the stack pointer is restored using the frame
; pointer
define void @simple_alloca(i32 %n) nounwind {
; RV32I-LABEL: simple_alloca:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp)
; RV32I-NEXT: sw s0, 8(sp)
; RV32I-NEXT: addi s0, sp, 16
; RV32I-NEXT: addi a0, a0, 15
; RV32I-NEXT: andi a0, a0, -16
; RV32I-NEXT: sub a0, sp, a0
; RV32I-NEXT: mv sp, a0
; RV32I-NEXT: call notdead
; RV32I-NEXT: addi sp, s0, -16
; RV32I-NEXT: lw s0, 8(sp)
; RV32I-NEXT: lw ra, 12(sp)
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
%1 = alloca i8, i32 %n
call void @notdead(i8* %1)
ret void
}
declare i8* @llvm.stacksave()
declare void @llvm.stackrestore(i8*)
define void @scoped_alloca(i32 %n) nounwind {
; RV32I-LABEL: scoped_alloca:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp)
; RV32I-NEXT: sw s0, 8(sp)
; RV32I-NEXT: sw s1, 4(sp)
; RV32I-NEXT: addi s0, sp, 16
; RV32I-NEXT: mv s1, sp
; RV32I-NEXT: addi a0, a0, 15
; RV32I-NEXT: andi a0, a0, -16
; RV32I-NEXT: sub a0, sp, a0
; RV32I-NEXT: mv sp, a0
; RV32I-NEXT: call notdead
; RV32I-NEXT: mv sp, s1
; RV32I-NEXT: addi sp, s0, -16
; RV32I-NEXT: lw s1, 4(sp)
; RV32I-NEXT: lw s0, 8(sp)
; RV32I-NEXT: lw ra, 12(sp)
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
%sp = call i8* @llvm.stacksave()
%addr = alloca i8, i32 %n
call void @notdead(i8* %addr)
call void @llvm.stackrestore(i8* %sp)
ret void
}
declare void @func(i8*, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32)
; Check that outgoing arguments passed on the stack do not corrupt a
; variable-sized stack object.
define void @alloca_callframe(i32 %n) nounwind {
; RV32I-LABEL: alloca_callframe:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp)
; RV32I-NEXT: sw s0, 8(sp)
; RV32I-NEXT: addi s0, sp, 16
; RV32I-NEXT: addi a0, a0, 15
; RV32I-NEXT: andi a0, a0, -16
; RV32I-NEXT: sub a0, sp, a0
; RV32I-NEXT: mv sp, a0
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: addi a1, zero, 12
; RV32I-NEXT: sw a1, 12(sp)
; RV32I-NEXT: addi a1, zero, 11
; RV32I-NEXT: sw a1, 8(sp)
; RV32I-NEXT: addi a1, zero, 10
; RV32I-NEXT: sw a1, 4(sp)
; RV32I-NEXT: addi t0, zero, 9
; RV32I-NEXT: addi a1, zero, 2
; RV32I-NEXT: addi a2, zero, 3
; RV32I-NEXT: addi a3, zero, 4
; RV32I-NEXT: addi a4, zero, 5
; RV32I-NEXT: addi a5, zero, 6
; RV32I-NEXT: addi a6, zero, 7
; RV32I-NEXT: addi a7, zero, 8
; RV32I-NEXT: sw t0, 0(sp)
; RV32I-NEXT: call func
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: addi sp, s0, -16
; RV32I-NEXT: lw s0, 8(sp)
; RV32I-NEXT: lw ra, 12(sp)
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
%1 = alloca i8, i32 %n
call void @func(i8* %1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8,
i32 9, i32 10, i32 11, i32 12)
ret void
}
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