From f02b8a9cca4bf991146dab44ef8707b987ce7a1d Mon Sep 17 00:00:00 2001 From: Jacob Young Date: Wed, 2 Nov 2022 22:58:55 -0400 Subject: cbe: fix padding bits after a bitcast --- src/codegen/c.zig | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'src/codegen/c.zig') diff --git a/src/codegen/c.zig b/src/codegen/c.zig index 980dfb5ff2..e9dcbd8435 100644 --- a/src/codegen/c.zig +++ b/src/codegen/c.zig @@ -3703,7 +3703,6 @@ fn airBitcast(f: *Function, inst: Air.Inst.Index) !CValue { const local = try f.allocLocal(inst_ty, .Const); try writer.writeAll(" = ("); try f.renderTypecast(writer, inst_ty); - try writer.writeByte(')'); try f.writeCValue(writer, operand, .Other); try writer.writeAll(";\n"); @@ -3721,6 +3720,17 @@ fn airBitcast(f: *Function, inst: Air.Inst.Index) !CValue { try f.renderTypecast(writer, inst_ty); try writer.writeAll("));\n"); + // Ensure padding bits have the expected value. + if (inst_ty.isAbiInt()) { + try f.writeCValue(writer, local, .Other); + try writer.writeAll(" = zig_wrap_"); + try f.object.dg.renderTypeForBuiltinFnName(writer, inst_ty); + try writer.writeByte('('); + try f.writeCValue(writer, local, .Other); + try f.object.dg.renderBuiltinInfo(writer, inst_ty, .Bits); + try writer.writeAll(");\n"); + } + return local; } -- cgit v1.2.3