================
@@ -1125,6 +1130,10 @@ Register SparcTargetLowering::getRegisterByName(const
char* RegName, LLT VT,
.Case("g4", SP::G4).Case("g5", SP::G5).Case("g6", SP::G6).Case("g7",
SP::G7)
.Default(0);
+ const SparcRegisterInfo *TRI = Subtarget->getRegisterInfo();
+ if (!TRI->isReservedReg(MF, Reg))
+ Reg = 0;
----------------
koachan wrote:
The intention is to make explicit register references (e.g GCC-style `register
int r asm("g1");`) to fail unless we also pass the corresponding `-ffixed`
flags to reserve it (unless, of course, the target register is already marked
as reserved by the ABI).
I've made a test case, but I am not sure how to put it in the .ll files since
the expected result is a `report_fatal_error` crash... any idea how to test for
this?
https://github.com/llvm/llvm-project/pull/74927
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