Author: Craig Topper Date: 2020-11-25T21:57:48-08:00 New Revision: 2254e014a9019bf17c3f5cb27c1dc40ca0f2ffce
URL: https://github.com/llvm/llvm-project/commit/2254e014a9019bf17c3f5cb27c1dc40ca0f2ffce DIFF: https://github.com/llvm/llvm-project/commit/2254e014a9019bf17c3f5cb27c1dc40ca0f2ffce.diff LOG: [RISCV] Add isel pattern to match (i64 (sra (shl X, 32), C)) to SRAIW if C > 32. Added: Modified: llvm/lib/Target/RISCV/RISCVInstrInfo.td llvm/test/CodeGen/RISCV/alu64.ll Removed: ################################################################################ diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfo.td b/llvm/lib/Target/RISCV/RISCVInstrInfo.td index 6a3bd3fa1109..8c3409487806 100644 --- a/llvm/lib/Target/RISCV/RISCVInstrInfo.td +++ b/llvm/lib/Target/RISCV/RISCVInstrInfo.td @@ -1144,6 +1144,8 @@ def : Pat<(srl (shl GPR:$rs1, (i64 32)), uimm6gt32:$shamt), (SRLIW GPR:$rs1, (ImmSub32 uimm6gt32:$shamt))>; def : Pat<(sra (sext_inreg GPR:$rs1, i32), uimm5:$shamt), (SRAIW GPR:$rs1, uimm5:$shamt)>; +def : Pat<(sra (shl GPR:$rs1, (i64 32)), uimm6gt32:$shamt), + (SRAIW GPR:$rs1, (ImmSub32 uimm6gt32:$shamt))>; def : PatGprGpr<riscv_sllw, SLLW>; def : PatGprGpr<riscv_srlw, SRLW>; diff --git a/llvm/test/CodeGen/RISCV/alu64.ll b/llvm/test/CodeGen/RISCV/alu64.ll index 1160b4055674..197420d58106 100644 --- a/llvm/test/CodeGen/RISCV/alu64.ll +++ b/llvm/test/CodeGen/RISCV/alu64.ll @@ -431,6 +431,23 @@ define signext i32 @sraiw(i32 %a) nounwind { ret i32 %1 } +define i64 @sraiw_i64(i64 %a) nounwind { +; RV64I-LABEL: sraiw_i64: +; RV64I: # %bb.0: +; RV64I-NEXT: sraiw a0, a0, 9 +; RV64I-NEXT: ret +; +; RV32I-LABEL: sraiw_i64: +; RV32I: # %bb.0: +; RV32I-NEXT: srai a2, a0, 9 +; RV32I-NEXT: srai a1, a0, 31 +; RV32I-NEXT: mv a0, a2 +; RV32I-NEXT: ret + %1 = shl i64 %a, 32 + %2 = ashr i64 %1, 41 + ret i64 %2 +} + define signext i32 @sextw(i32 zeroext %a) nounwind { ; RV64I-LABEL: sextw: ; RV64I: # %bb.0: _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
