Add support for the 'h' constraint.
Part of rdar://9119939
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134203 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 092ff17..1b9bcc9 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -7482,6 +7482,7 @@
default: break;
case 'l': return C_RegisterClass;
case 'w': return C_RegisterClass;
+ case 'h': return C_RegisterClass;
}
} else if (Constraint.size() == 2) {
switch (Constraint[0]) {
@@ -7534,11 +7535,16 @@
if (Constraint.size() == 1) {
// GCC ARM Constraint Letters
switch (Constraint[0]) {
- case 'l':
+ case 'l': // Low regs or general regs.
if (Subtarget->isThumb())
return Pair(0U, ARM::tGPRRegisterClass);
else
return Pair(0U, ARM::GPRRegisterClass);
+ case 'h': // High regs or no regs.
+ if (Subtarget->isThumb())
+ return Pair(0U, ARM::hGPRRegisterClass);
+ else
+ return Pair(0u, static_cast<const TargetRegisterClass*>(0));
case 'r':
return Pair(0U, ARM::GPRRegisterClass);
case 'w':