1097ee61bf
Rather than materializing the 0xffff immediate for the AND, use a shift left to remove the upper bits and then shift in zeros from the right. This pattern occurs when type legalizing an i16 right shift. I've implemented this with custom selection code for a number of reasons. I've limited this to the AND having a single use. We need to compensate for SimplifyDemandedBits altering the AND mask. I'm using *W opcodes on RV64. We may want to generlize this in the future. For all these reason it seemed easiest to do it this way. Reviewed By: luismarques Differential Revision: https://reviews.llvm.org/D95774
321 lines
6.9 KiB
LLVM
321 lines
6.9 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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; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s \
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; RUN: | FileCheck %s -check-prefix=RV64I
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; These tests are identical to those in alu32.ll but operate on i16. They check
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; that legalisation of these non-native types doesn't introduce unnecessary
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; inefficiencies.
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define i16 @addi(i16 %a) nounwind {
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; RV32I-LABEL: addi:
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; RV32I: # %bb.0:
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; RV32I-NEXT: addi a0, a0, 1
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: addi:
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; RV64I: # %bb.0:
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; RV64I-NEXT: addi a0, a0, 1
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; RV64I-NEXT: ret
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%1 = add i16 %a, 1
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ret i16 %1
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}
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define i16 @slti(i16 %a) nounwind {
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; RV32I-LABEL: slti:
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; RV32I: # %bb.0:
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; RV32I-NEXT: slli a0, a0, 16
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; RV32I-NEXT: srai a0, a0, 16
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; RV32I-NEXT: slti a0, a0, 2
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: slti:
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; RV64I: # %bb.0:
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; RV64I-NEXT: slli a0, a0, 48
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; RV64I-NEXT: srai a0, a0, 48
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; RV64I-NEXT: slti a0, a0, 2
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; RV64I-NEXT: ret
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%1 = icmp slt i16 %a, 2
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%2 = zext i1 %1 to i16
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ret i16 %2
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}
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define i16 @sltiu(i16 %a) nounwind {
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; RV32I-LABEL: sltiu:
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; RV32I: # %bb.0:
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; RV32I-NEXT: lui a1, 16
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; RV32I-NEXT: addi a1, a1, -1
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; RV32I-NEXT: and a0, a0, a1
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; RV32I-NEXT: sltiu a0, a0, 3
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: sltiu:
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; RV64I: # %bb.0:
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; RV64I-NEXT: lui a1, 16
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; RV64I-NEXT: addiw a1, a1, -1
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; RV64I-NEXT: and a0, a0, a1
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; RV64I-NEXT: sltiu a0, a0, 3
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; RV64I-NEXT: ret
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%1 = icmp ult i16 %a, 3
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%2 = zext i1 %1 to i16
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ret i16 %2
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}
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define i16 @xori(i16 %a) nounwind {
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; RV32I-LABEL: xori:
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; RV32I: # %bb.0:
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; RV32I-NEXT: xori a0, a0, 4
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: xori:
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; RV64I: # %bb.0:
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; RV64I-NEXT: xori a0, a0, 4
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; RV64I-NEXT: ret
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%1 = xor i16 %a, 4
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ret i16 %1
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}
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define i16 @ori(i16 %a) nounwind {
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; RV32I-LABEL: ori:
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; RV32I: # %bb.0:
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; RV32I-NEXT: ori a0, a0, 5
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: ori:
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; RV64I: # %bb.0:
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; RV64I-NEXT: ori a0, a0, 5
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; RV64I-NEXT: ret
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%1 = or i16 %a, 5
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ret i16 %1
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}
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define i16 @andi(i16 %a) nounwind {
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; RV32I-LABEL: andi:
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; RV32I: # %bb.0:
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; RV32I-NEXT: andi a0, a0, 6
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: andi:
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; RV64I: # %bb.0:
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; RV64I-NEXT: andi a0, a0, 6
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; RV64I-NEXT: ret
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%1 = and i16 %a, 6
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ret i16 %1
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}
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define i16 @slli(i16 %a) nounwind {
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; RV32I-LABEL: slli:
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; RV32I: # %bb.0:
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; RV32I-NEXT: slli a0, a0, 7
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: slli:
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; RV64I: # %bb.0:
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; RV64I-NEXT: slli a0, a0, 7
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; RV64I-NEXT: ret
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%1 = shl i16 %a, 7
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ret i16 %1
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}
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define i16 @srli(i16 %a) nounwind {
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; RV32I-LABEL: srli:
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; RV32I: # %bb.0:
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; RV32I-NEXT: slli a0, a0, 16
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; RV32I-NEXT: srli a0, a0, 22
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: srli:
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; RV64I: # %bb.0:
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; RV64I-NEXT: slliw a0, a0, 16
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; RV64I-NEXT: srliw a0, a0, 22
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; RV64I-NEXT: ret
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%1 = lshr i16 %a, 6
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ret i16 %1
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}
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define i16 @srai(i16 %a) nounwind {
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; RV32I-LABEL: srai:
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; RV32I: # %bb.0:
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; RV32I-NEXT: slli a0, a0, 16
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; RV32I-NEXT: srai a0, a0, 25
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: srai:
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; RV64I: # %bb.0:
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; RV64I-NEXT: slli a0, a0, 48
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; RV64I-NEXT: srai a0, a0, 57
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; RV64I-NEXT: ret
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%1 = ashr i16 %a, 9
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ret i16 %1
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}
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define i16 @add(i16 %a, i16 %b) nounwind {
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; RV32I-LABEL: add:
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; RV32I: # %bb.0:
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; RV32I-NEXT: add a0, a0, a1
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: add:
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; RV64I: # %bb.0:
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; RV64I-NEXT: add a0, a0, a1
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; RV64I-NEXT: ret
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%1 = add i16 %a, %b
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ret i16 %1
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}
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define i16 @sub(i16 %a, i16 %b) nounwind {
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; RV32I-LABEL: sub:
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; RV32I: # %bb.0:
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; RV32I-NEXT: sub a0, a0, a1
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: sub:
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; RV64I: # %bb.0:
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; RV64I-NEXT: sub a0, a0, a1
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; RV64I-NEXT: ret
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%1 = sub i16 %a, %b
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ret i16 %1
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}
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define i16 @sll(i16 %a, i16 %b) nounwind {
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; RV32I-LABEL: sll:
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; RV32I: # %bb.0:
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; RV32I-NEXT: sll a0, a0, a1
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: sll:
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; RV64I: # %bb.0:
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; RV64I-NEXT: sll a0, a0, a1
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; RV64I-NEXT: ret
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%1 = shl i16 %a, %b
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ret i16 %1
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}
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define i16 @slt(i16 %a, i16 %b) nounwind {
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; RV32I-LABEL: slt:
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; RV32I: # %bb.0:
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; RV32I-NEXT: slli a1, a1, 16
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; RV32I-NEXT: srai a1, a1, 16
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; RV32I-NEXT: slli a0, a0, 16
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; RV32I-NEXT: srai a0, a0, 16
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; RV32I-NEXT: slt a0, a0, a1
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: slt:
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; RV64I: # %bb.0:
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; RV64I-NEXT: slli a1, a1, 48
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; RV64I-NEXT: srai a1, a1, 48
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; RV64I-NEXT: slli a0, a0, 48
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; RV64I-NEXT: srai a0, a0, 48
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; RV64I-NEXT: slt a0, a0, a1
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; RV64I-NEXT: ret
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%1 = icmp slt i16 %a, %b
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%2 = zext i1 %1 to i16
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ret i16 %2
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}
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define i16 @sltu(i16 %a, i16 %b) nounwind {
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; RV32I-LABEL: sltu:
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; RV32I: # %bb.0:
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; RV32I-NEXT: lui a2, 16
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; RV32I-NEXT: addi a2, a2, -1
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; RV32I-NEXT: and a1, a1, a2
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; RV32I-NEXT: and a0, a0, a2
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; RV32I-NEXT: sltu a0, a0, a1
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: sltu:
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; RV64I: # %bb.0:
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; RV64I-NEXT: lui a2, 16
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; RV64I-NEXT: addiw a2, a2, -1
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; RV64I-NEXT: and a1, a1, a2
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; RV64I-NEXT: and a0, a0, a2
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; RV64I-NEXT: sltu a0, a0, a1
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; RV64I-NEXT: ret
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%1 = icmp ult i16 %a, %b
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%2 = zext i1 %1 to i16
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ret i16 %2
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}
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define i16 @xor(i16 %a, i16 %b) nounwind {
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; RV32I-LABEL: xor:
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; RV32I: # %bb.0:
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; RV32I-NEXT: xor a0, a0, a1
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: xor:
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; RV64I: # %bb.0:
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; RV64I-NEXT: xor a0, a0, a1
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; RV64I-NEXT: ret
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%1 = xor i16 %a, %b
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ret i16 %1
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}
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define i16 @srl(i16 %a, i16 %b) nounwind {
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; RV32I-LABEL: srl:
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; RV32I: # %bb.0:
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; RV32I-NEXT: lui a2, 16
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; RV32I-NEXT: addi a2, a2, -1
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; RV32I-NEXT: and a0, a0, a2
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; RV32I-NEXT: srl a0, a0, a1
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: srl:
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; RV64I: # %bb.0:
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; RV64I-NEXT: lui a2, 16
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; RV64I-NEXT: addiw a2, a2, -1
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; RV64I-NEXT: and a0, a0, a2
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; RV64I-NEXT: srl a0, a0, a1
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; RV64I-NEXT: ret
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%1 = lshr i16 %a, %b
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ret i16 %1
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}
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define i16 @sra(i16 %a, i16 %b) nounwind {
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; RV32I-LABEL: sra:
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; RV32I: # %bb.0:
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; RV32I-NEXT: slli a0, a0, 16
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; RV32I-NEXT: srai a0, a0, 16
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; RV32I-NEXT: sra a0, a0, a1
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: sra:
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; RV64I: # %bb.0:
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; RV64I-NEXT: slli a0, a0, 48
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; RV64I-NEXT: srai a0, a0, 48
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; RV64I-NEXT: sra a0, a0, a1
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; RV64I-NEXT: ret
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%1 = ashr i16 %a, %b
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ret i16 %1
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}
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define i16 @or(i16 %a, i16 %b) nounwind {
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; RV32I-LABEL: or:
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; RV32I: # %bb.0:
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; RV32I-NEXT: or a0, a0, a1
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: or:
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; RV64I: # %bb.0:
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; RV64I-NEXT: or a0, a0, a1
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; RV64I-NEXT: ret
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%1 = or i16 %a, %b
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ret i16 %1
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}
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define i16 @and(i16 %a, i16 %b) nounwind {
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; RV32I-LABEL: and:
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; RV32I: # %bb.0:
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; RV32I-NEXT: and a0, a0, a1
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: and:
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; RV64I: # %bb.0:
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; RV64I-NEXT: and a0, a0, a1
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; RV64I-NEXT: ret
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%1 = and i16 %a, %b
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ret i16 %1
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}
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