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[arm] Distinguish the /U[qytnms]/, 'Uv', 'Q', and 'm' inline assembly memory constraints.

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Summary:
But still handle them the same way since I don't know how they differ on
this target.

Of these, /U[qytnms]/ do not have backend tests but are accepted by clang.

No functional change intended.

Reviewers: t.p.northover

Reviewed By: t.p.northover

Subscribers: t.p.northover, aemerson, llvm-commits

Differential Revision: http://reviews.llvm.org/D8203


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238921 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Sanders
2015-06-03 12:33:56 +00:00
parent fc28da72f0
commit b0e7aeb694
3 changed files with 51 additions and 9 deletions
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27
lib/Target/ARM/ARMISelLowering.h
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@@ -351,8 +351,31 @@ namespace llvm {
unsigned getInlineAsmMemConstraint(
const std::string &ConstraintCode) const override {
// FIXME: Map different constraints differently.
return InlineAsm::Constraint_m;
if (ConstraintCode == "Q")
return InlineAsm::Constraint_Q;
else if (ConstraintCode.size() == 2) {
if (ConstraintCode[0] == 'U') {
switch(ConstraintCode[1]) {
default:
break;
case 'm':
return InlineAsm::Constraint_Um;
case 'n':
return InlineAsm::Constraint_Un;
case 'q':
return InlineAsm::Constraint_Uq;
case 's':
return InlineAsm::Constraint_Us;
case 't':
return InlineAsm::Constraint_Ut;
case 'v':
return InlineAsm::Constraint_Uv;
case 'y':
return InlineAsm::Constraint_Uy;
}
}
}
return TargetLowering::getInlineAsmMemConstraint(ConstraintCode);
}
const ARMSubtarget* getSubtarget() const {