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stage2: sparc64: Proper handling of compare flags

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This commit is contained in:
Koakuma 2022-05-28 09:05:57 +07:00
parent 9db81fee5d
commit 3220e0b61c
1 changed files with 6 additions and 0 deletions
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6
src/arch/sparc64/CodeGen.zig
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@ -2029,6 +2029,7 @@ fn binOpImmediate(
defer if (new_lhs_lock) |reg| self.register_manager.unlockReg(reg);
const dest_reg = switch (mir_tag) {
.cmp => undefined, // cmp has no destination register
else => if (metadata) |md| blk: {
if (lhs_is_register and self.reuseOperand(
md.inst,
@ -2148,6 +2149,7 @@ fn binOpRegister(
defer if (new_rhs_lock) |reg| self.register_manager.unlockReg(reg);
const dest_reg = switch (mir_tag) {
.cmp => undefined, // cmp has no destination register
else => if (metadata) |md| blk: {
if (lhs_is_register and self.reuseOperand(md.inst, md.lhs, 0, lhs)) {
break :blk lhs_reg;
@ -3064,6 +3066,10 @@ fn processDeath(self: *Self, inst: Air.Inst.Index) void {
.register => |reg| {
self.register_manager.freeReg(reg);
},
.register_with_overflow => |rwo| {
self.register_manager.freeReg(rwo.reg);
self.compare_flags_inst = null;
},
.compare_flags_signed, .compare_flags_unsigned => {
self.compare_flags_inst = null;
},