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stage2: fix bug in genArg

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When an argument is unused in the function body, still increment
arg_index so we still select the correct arguments in the args slice.
This commit is contained in:
joachimschmidt557 2021-01-08 22:11:49 +01:00 committed by Andrew Kelley
parent 29928af600
commit a7da90071e
1 changed files with 4 additions and 2 deletions
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6
src/codegen.zig
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@ -1480,6 +1480,9 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type {
}
fn genArg(self: *Self, inst: *ir.Inst.Arg) !MCValue {
const arg_index = self.arg_index;
self.arg_index += 1;
if (FreeRegInt == u0) {
return self.fail(inst.base.src, "TODO implement Register enum for {}", .{self.target.cpu.arch});
}
@ -1488,8 +1491,7 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type {
try self.registers.ensureCapacity(self.gpa, self.registers.count() + 1);
const result = self.args[self.arg_index];
self.arg_index += 1;
const result = self.args[arg_index];
const name_with_null = inst.name[0 .. mem.lenZ(inst.name) + 1];
switch (result) {