x86_64: spill eflags when initializing bool vector

mlugg · mlugg · commit df004887210c · 2025-10-31T13:02:16.000Z
diff --git a/src/codegen/x86_64/CodeGen.zig b/src/codegen/x86_64/CodeGen.zig
@@ -180028,6 +180028,8 @@ fn airAggregateInitBoolVec(self: *CodeGen, inst: Air.Inst.Index) !void {
     {
         const dst_lock = self.register_manager.lockRegAssumeUnused(dst_reg);
         defer self.register_manager.unlockReg(dst_lock);
+
+        try self.spillEflagsIfOccupied();
         try self.asmRegisterRegister(
             .{ ._, .xor },
             registerAlias(dst_reg, @min(result_size, 4)),

Original file line number	Diff line number	Diff line change
`@@ -180028,6 +180028,8 @@ fn airAggregateInitBoolVec(self: *CodeGen, inst: Air.Inst.Index) !void {`
`180028`	`180028`	`{`
`180029`	`180029`	`const dst_lock = self.register_manager.lockRegAssumeUnused(dst_reg);`
`180030`	`180030`	`defer self.register_manager.unlockReg(dst_lock);`
	`180031`	`+`
	`180032`	`+ try self.spillEflagsIfOccupied();`
`180031`	`180033`	`try self.asmRegisterRegister(`
`180032`	`180034`	`.{ ._, .xor },`
`180033`	`180035`	`registerAlias(dst_reg, @min(result_size, 4)),`