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llvm-project/llvm/test/CodeGen/RISCV/indirectbr.ll

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[RISCV] Support and tests for a variety of additional LLVM IR constructs Previous patches primarily ensured that codegen was possible for the standard RISC-V instructions. However, there are a number of IR inputs that wouldn't be appropriately lowered. This patch both adds test cases and supports lowering for a number of these cases: * Improved sext/zext/trunc support * Support for setcc variants that don't map directly to RISC-V instructions * Lowering mul, and hence support for external symbols * addc, adde, subc, sube * mulhs, srem, mulhu, urem, udiv, sdiv * {srl,sra,shl}_parts * brind * br_jt * bswap, ctlz, cttz, ctpop * rotl, rotr * BlockAddress operands Differential Revision: https://reviews.llvm.org/D29938 llvm-svn: 318737
2017-11-21 16:11:03 +08:00
; 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
define i32 @indirectbr(i8* %target) nounwind {
; RV32I-LABEL: indirectbr:
; RV32I: # BB#0:
; RV32I-NEXT: sw ra, 0(s0)
; RV32I-NEXT: jalr zero, a0, 0
; RV32I-NEXT: .LBB0_1: # %ret
; RV32I-NEXT: addi a0, zero, 0
; RV32I-NEXT: lw ra, 0(s0)
; RV32I-NEXT: jalr zero, ra, 0
indirectbr i8* %target, [label %test_label]
test_label:
br label %ret
ret:
ret i32 0
}
define i32 @indirectbr_with_offset(i8* %a) nounwind {
; RV32I-LABEL: indirectbr_with_offset:
; RV32I: # BB#0:
; RV32I-NEXT: sw ra, 0(s0)
; RV32I-NEXT: jalr zero, a0, 1380
; RV32I-NEXT: .LBB1_1: # %ret
; RV32I-NEXT: addi a0, zero, 0
; RV32I-NEXT: lw ra, 0(s0)
; RV32I-NEXT: jalr zero, ra, 0
%target = getelementptr inbounds i8, i8* %a, i32 1380
indirectbr i8* %target, [label %test_label]
test_label:
br label %ret
ret:
ret i32 0
}