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| author | Jacob Young <jacobly0@users.noreply.github.com> | 2023-03-13 20:25:13 -0400 |
|---|---|---|
| committer | Jacob Young <jacobly0@users.noreply.github.com> | 2023-03-15 00:01:44 -0400 |
| commit | 5ab426a3020614dcc8640a4019c8d93c6c917ea0 (patch) | |
| tree | dfc57bb2bbe4f14256cf3a7e760cc6ffe7347931 /src | |
| parent | 9a4e9215fcd91cc75e569195834ba1428a736fa0 (diff) | |
| download | zig-5ab426a3020614dcc8640a4019c8d93c6c917ea0.tar.gz zig-5ab426a3020614dcc8640a4019c8d93c6c917ea0.zip | |
x86_64: fix store of undefined
Diffstat (limited to 'src')
| -rw-r--r-- | src/arch/x86_64/CodeGen.zig | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/arch/x86_64/CodeGen.zig b/src/arch/x86_64/CodeGen.zig index a547b1222d..12c5071462 100644 --- a/src/arch/x86_64/CodeGen.zig +++ b/src/arch/x86_64/CodeGen.zig @@ -2861,7 +2861,13 @@ fn store(self: *Self, ptr: MCValue, value: MCValue, ptr_ty: Type, value_ty: Type .unreach => unreachable, .eflags => unreachable, .undef => { - try self.genSetReg(value_ty, reg, value); + switch (abi_size) { + 1 => try self.store(ptr, .{ .immediate = 0xaa }, ptr_ty, value_ty), + 2 => try self.store(ptr, .{ .immediate = 0xaaaa }, ptr_ty, value_ty), + 4 => try self.store(ptr, .{ .immediate = 0xaaaaaaaa }, ptr_ty, value_ty), + 8 => try self.store(ptr, .{ .immediate = 0xaaaaaaaaaaaaaaaa }, ptr_ty, value_ty), + else => try self.genInlineMemset(ptr, .{ .immediate = 0xaa }, .{ .immediate = abi_size }, .{}), + } }, .immediate => |imm| { switch (abi_size) { |