PhysRegState[PhysReg] = NewState;
for (const unsigned *AS = TRI->getAliasSet(PhysReg);
unsigned Alias = *AS; ++AS) {
- UsedInInstr.set(Alias);
switch (unsigned VirtReg = PhysRegState[Alias]) {
case regDisabled:
break;
if (!Reg || !TargetRegisterInfo::isPhysicalRegister(Reg)) continue;
DEBUG(dbgs() << "\tSetting reg " << Reg << " as used in instr\n");
UsedInInstr.set(Reg);
- for (const unsigned *AS = TRI->getAliasSet(Reg); *AS; ++AS) {
- DEBUG(dbgs() << "\tSetting alias reg " << *AS << " as used in instr\n");
- UsedInInstr.set(*AS);
- }
}
// Also mark PartialDefs as used to avoid reallocation.
--- /dev/null
+; RUN: llc < %s -O0 -verify-machineinstrs -regalloc=fast
+; Previously we'd crash as out of registers on this input by clobbering all of
+; the aliases.
+target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:32:64-v128:32:128-a0:0:32-n32"
+target triple = "thumbv7-apple-darwin10.0.0"
+
+define void @_Z8TestCasev() nounwind ssp {
+entry:
+ %a = alloca float, align 4
+ %tmp = load float* %a, align 4
+ call void asm sideeffect "", "w,~{s0},~{s16}"(float %tmp) nounwind, !srcloc !0
+ ret void
+}
+
+!0 = metadata !{i32 109}