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[RISCV] Handle globals and block addresses in asm operands 

Summary: These seem to be the machine operand types currently needed by the
RISC-V target.

Reviewers: asb, lenary
Reviewed By: lenary
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D72275
This commit is contained in:
Luís Marques 2020-01-13 15:33:07 +00:00
parent b11027a086
commit 043c5eafa8
2 changed files with 52 additions and 2 deletions
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8
llvm/lib/Target/RISCV/RISCVAsmPrinter.cpp
View File

@ -121,6 +121,14 @@ bool RISCVAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
case MachineOperand::MO_Register:
OS << RISCVInstPrinter::getRegisterName(MO.getReg());
return false;
case MachineOperand::MO_GlobalAddress:
PrintSymbolOperand(MO, OS);
return false;
case MachineOperand::MO_BlockAddress: {
MCSymbol *Sym = GetBlockAddressSymbol(MO.getBlockAddress());
Sym->print(OS, MAI);
return false;
}
default:
break;
}

46
llvm/test/CodeGen/RISCV/inline-asm.ll
View File

@ -78,7 +78,7 @@ define i32 @constraint_m2(i32* %a) nounwind {
; RV64I-NEXT: lw a0, 0(a0)
; RV64I-NEXT: #NO_APP
; RV64I-NEXT: ret
%1 = tail call i32 asm "lw $0, $1", "=r,*m"(i32* %a) nounwind
%1 = tail call i32 asm "lw $0, $1", "=r,*m"(i32* %a)
ret i32 %1
}
@ -249,4 +249,46 @@ define i32 @modifier_i_reg(i32 %a, i32 %b) nounwind {
ret i32 %1
}
; TODO: expend tests for more complex constraints, out of range immediates etc
define void @operand_global() nounwind {
; RV32I-LABEL: operand_global:
; RV32I: # %bb.0:
; RV32I-NEXT: #APP
; RV32I-NEXT: .8byte gi
; RV32I-NEXT: #NO_APP
; RV32I-NEXT: ret
;
; RV64I-LABEL: operand_global:
; RV64I: # %bb.0:
; RV64I-NEXT: #APP
; RV64I-NEXT: .8byte gi
; RV64I-NEXT: #NO_APP
; RV64I-NEXT: ret
tail call void asm sideeffect ".8byte $0", "i"(i32* @gi)
ret void
}
define void @operand_block_address() nounwind {
; RV32I-LABEL: operand_block_address:
; RV32I: # %bb.0:
; RV32I-NEXT: #APP
; RV32I-NEXT: j .Ltmp0
; RV32I-NEXT: #NO_APP
; RV32I-NEXT: .Ltmp0: # Block address taken
; RV32I-NEXT: # %bb.1: # %bb
; RV32I-NEXT: ret
;
; RV64I-LABEL: operand_block_address:
; RV64I: # %bb.0:
; RV64I-NEXT: #APP
; RV64I-NEXT: j .Ltmp0
; RV64I-NEXT: #NO_APP
; RV64I-NEXT: .Ltmp0: # Block address taken
; RV64I-NEXT: # %bb.1: # %bb
; RV64I-NEXT: ret
call void asm sideeffect "j $0", "i"(i8* blockaddress(@operand_block_address, %bb))
br label %bb
bb:
ret void
}
; TODO: expand tests for more complex constraints, out of range immediates etc