For inline asm:
- recognize string "{memory}" in the MI generation
- mark as mayload/maystore when there's a memory clobber constraint.
PR14859.
Patch by Krzysztof Parzyszek
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172228 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index d2da9b7..35a11b4 100644
--- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -3068,7 +3068,9 @@
TargetLowering::ConstraintType
TargetLowering::getConstraintType(const std::string &Constraint) const {
- if (Constraint.size() == 1) {
+ unsigned S = Constraint.size();
+
+ if (S == 1) {
switch (Constraint[0]) {
default: break;
case 'r': return C_RegisterClass;
@@ -3097,9 +3099,11 @@
}
}
- if (Constraint.size() > 1 && Constraint[0] == '{' &&
- Constraint[Constraint.size()-1] == '}')
+ if (S > 1 && Constraint[0] == '{' && Constraint[S-1] == '}') {
+ if (S == 8 && !Constraint.compare(1, 6, "memory", 6)) // "{memory}"
+ return C_Memory;
return C_Register;
+ }
return C_Unknown;
}