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Implement 'm' memory operand properly

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83785 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov 2009-10-11 19:14:21 +00:00
parent c4be951ddc
commit 95eb470ce1
2 changed files with 40 additions and 11 deletions
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20
lib/Target/MSP430/MSP430ISelDAGToDAG.cpp
View File

@ -52,6 +52,10 @@ namespace {
return "MSP430 DAG->DAG Pattern Instruction Selection";
}
virtual bool
SelectInlineAsmMemoryOperand(const SDValue &Op, char ConstraintCode,
std::vector<SDValue> &OutOps);
// Include the pieces autogenerated from the target description.
#include "MSP430GenDAGISel.inc"
@ -122,6 +126,22 @@ bool MSP430DAGToDAGISel::SelectAddr(SDValue Op, SDValue Addr,
}
bool MSP430DAGToDAGISel::
SelectInlineAsmMemoryOperand(const SDValue &Op, char ConstraintCode,
std::vector<SDValue> &OutOps) {
SDValue Op0, Op1;
switch (ConstraintCode) {
default: return true;
case 'm': // memory
if (!SelectAddr(Op, Op, Op0, Op1))
return true;
break;
}
OutOps.push_back(Op0);
OutOps.push_back(Op1);
return false;
}
/// InstructionSelect - This callback is invoked by
/// SelectionDAGISel when it has created a SelectionDAG for us to codegen.

31
test/CodeGen/MSP430/inline-asm.ll
View File

@ -1,16 +1,25 @@
; RUN: llc < %s
; PR4778
target datalayout = "e-p:16:8:8-i8:8:8-i16:8:8-i32:8:8"
target triple = "msp430-generic-generic"
define signext i8 @__nesc_atomic_start() nounwind {
entry:
%0 = tail call i16 asm sideeffect "mov r2, $0", "=r"() nounwind ; <i16> [#uses=1]
%1 = trunc i16 %0 to i8 ; <i8> [#uses=1]
%and3 = lshr i8 %1, 3 ; <i8> [#uses=1]
%conv1 = and i8 %and3, 1 ; <i8> [#uses=1]
tail call void asm sideeffect "dint", ""() nounwind
tail call void asm sideeffect "nop", ""() nounwind
tail call void asm sideeffect "", "~{memory}"() nounwind
ret i8 %conv1
define void @imm() nounwind {
call void asm sideeffect "bic\09$0,r2", "i"(i16 32) nounwind
ret void
}
define void @reg(i16 %a) nounwind {
call void asm sideeffect "bic\09$0,r2", "r"(i16 %a) nounwind
ret void
}
@foo = global i16 0, align 2
define void @immmem() nounwind {
call void asm sideeffect "bic\09$0,r2", "i"(i16* getelementptr(i16* @foo, i32 1)) nounwind
ret void
}
define void @mem() nounwind {
call void asm sideeffect "bic\09$0,r2", "m"(i16* @foo) nounwind
ret void
}