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[ARM] Handle the inline asm constraint type 'o'

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This means "memory with offset" and requires very little plumbing to get working. This fixes PR25317.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251280 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
James Molloy 2015-10-26 10:04:52 +00:00
parent 6f975c928c
commit 82ace96a30
3 changed files with 14 additions and 0 deletions
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1
lib/Target/ARM/ARMISelDAGToDAG.cpp
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@ -3924,6 +3924,7 @@ SelectInlineAsmMemoryOperand(const SDValue &Op, unsigned ConstraintID,
// be an immediate and not a memory constraint.
// Fallthrough.
case InlineAsm::Constraint_m:
case InlineAsm::Constraint_o:
case InlineAsm::Constraint_Q:
case InlineAsm::Constraint_Um:
case InlineAsm::Constraint_Un:

2
lib/Target/ARM/ARMISelLowering.h
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@ -348,6 +348,8 @@ namespace llvm {
getInlineAsmMemConstraint(StringRef ConstraintCode) const override {
if (ConstraintCode == "Q")
return InlineAsm::Constraint_Q;
else if (ConstraintCode == "o")
return InlineAsm::Constraint_o;
else if (ConstraintCode.size() == 2) {
if (ConstraintCode[0] == 'U') {
switch(ConstraintCode[1]) {

11
test/CodeGen/ARM/pr25317.ll Normal file
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@ -0,0 +1,11 @@
; RUN: llc < %s | FileCheck %s
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "armv7--linux-gnueabihf"
; CHECK-LABEL: f:
; CHECK: str lr, [r0]
define void @f(i32* %p) {
call void asm sideeffect "str lr, $0", "=*o"(i32* %p)
ret void
}