Imported Upstream version 5.18.0.179

Former-commit-id: 67aa10e65b237e1c4537630979ee99ebe1374215

external/llvm/test/CodeGen/RISCV/alloca.ll

@@ -0,0 +1,65 @@
+; 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:    lui a1, %hi(notdead)
+; RV32I-NEXT:    addi a1, a1, %lo(notdead)
+; RV32I-NEXT:    jalr a1
+; 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:    lui a1, %hi(notdead)
+; RV32I-NEXT:    addi a1, a1, %lo(notdead)
+; RV32I-NEXT:    jalr a1
+; 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
+}